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  1. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  2. ;;                                                              ;;
  3. ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;
  4. ;; Distributed under terms of the GNU General Public License    ;;
  5. ;;                                                              ;;
  6. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  7.  
  8. SYSTEM FUNCTIONS of OS Kolibri 0.7.7.0
  9.  
  10. Number of the function is located in the register eax.
  11. The call of the system function is executed by "int 0x40" command.
  12. All registers except explicitly declared in the returned value,
  13.     including eflags, are preserved.
  14.  
  15.  
  16. ======================================================================
  17. ============== Function 0 - define and draw the window. ==============
  18. ======================================================================
  19. Defines an application window. Draws a frame of the window, header and
  20. working area. For skinned windows defines standard close and minimize
  21. buttons.
  22. Parameters:
  23.   * eax = 0 - function number
  24.   * ebx = [coordinate on axis x]*65536 + [size on axis x]
  25.   * ecx = [coordinate on axis y]*65536 + [size on axis y]
  26.   * edx = 0xXYRRGGBB, where:
  27.     * Y = style of the window:
  28.       * Y=0 - type I - fixed-size window
  29.       * Y=1 - only define window area, draw nothing
  30.       * Y=2 - type II - variable-size window
  31.       * Y=3 - skinned window
  32.       * Y=4 - skinned fixed-size window
  33.       * other possible values (from 5 up to 15) are reserved,
  34.         function call with such Y is ignored
  35.     * RR, GG, BB = accordingly red, green, blue components of a color
  36.       of the working area of the window (are ignored for style Y=2)
  37.     * X = DCBA (bits)
  38.       * A = 1 - window has caption; for styles Y=3,4 caption string
  39.                   must be passed in edi, for other styles use
  40.                   subfunction 1 of function 71
  41.       * B = 1 - coordinates of all graphics primitives are relative to
  42.                   window client area
  43.       * C = 1 - don't fill working area on window draw
  44.       * D = 0 - normal filling of the working area, 1 - gradient
  45.     The following parameters are intended for windows
  46.     of a type I and II, and ignored for styles Y=1,3:
  47.   * esi = 0xXYRRGGBB - color of the header
  48.     * RR, GG, BB define color
  49.     * Y=0 - usual window, Y=1 - unmovable window
  50.     * X defines a gradient of header: X=0 - no gradient,
  51.       X=8 - usual gradient,
  52.       for windows of a type II X=4 - negative gradient
  53.     * other values of X and Y are reserved
  54.   * edi = 0x00RRGGBB - color of the frame
  55. Returned value:
  56.   * function does not return value
  57. Remarks:
  58.   * Position and sizes of the window are installed by the first
  59.     call of this function and are ignored at subsequent; to change
  60.     position and/or sizes of already created window use function 67.
  61.   * For windows with styles Y=3,4 and caption (A=1) caption string
  62.     is set by the first call of this function and is ignored
  63.     at subsequent (strictly speaking, is ignored after a call to
  64.     subfunction 2 of function 12 - end redraw); to change caption of
  65.     already created window use subfunction 1 of function 71.
  66.   * If the window has appropriate styles, position and/or sizes can be
  67.     changed by user. Current position and sizes can be obtained
  68.     by function 9.
  69.   * The window must fit on the screen. If the transferred
  70.     coordinates and sizes do not satisfy to this condition,
  71.     appropriate coordinate (or, probably, both) is considered as zero,
  72.     and if it does not help too, the appropriate size
  73.     (or, probably, both) is installed in a size of the screen.
  74.  
  75.     Further let us designate xpos,ypos,xsize,ysize - values passed
  76.     in ebx,ecx. The coordinates are resulted concerning
  77.     the left upper corner of the window, which, thus, is set as (0,0),
  78.     coordinates of the right lower corner essence (xsize,ysize).
  79.   * The sizes of the window are understood in sence of coordinates
  80.     of the right lower corner. This concerns all other functions too.
  81.     It means, that the real sizes are on 1 pixel more.
  82.   * The window of type I looks as follows:
  83.     * draw external frame of color indicated in edi, 1 pixel in width
  84.     * draw header - rectangle with the left upper corner (1,1) and
  85.       right lower (xsize-1,min(25,ysize)) color indicated in esi
  86.       (taking a gradient into account)
  87.     * if ysize>=26, fill the working area of the window -
  88.       rectangle with the left upper corner (1,21) and right lower
  89.       (xsize-1,ysize-1) (sizes (xsize-1)*(ysize-21)) with color
  90.       indicated in edx (taking a gradient into account)
  91.     * if A=1 and caption has been already set by subfunction 1
  92.       of function 71, it is drawn in the corresponding place of header
  93.   * The window of style Y=1 looks as follows:
  94.     * completely defined by the application
  95.   * The window of type II looks as follows:
  96.     * draw external frame of width 1 pixel with the "shaded" color
  97.       edi (all components of the color decrease twice)
  98.     * draw intermediate frame of width 3 pixels with color edi
  99.     * draw internal frame of width 1 pixel with the "shaded" color edi
  100.     * draw header - rectangle with the left upper corner (4,4)
  101.       and right lower (xsize-4,min(20,ysize)) color, indicated in esi
  102.       (taking a gradient into account)
  103.     * if ysize>=26, fill the working area of the window -
  104.       rectangle with the left upper corner (5,20) and right lower
  105.       (xsize-5,ysize-5) with color indicated in edx
  106.       (taking a gradient into account)
  107.     * if A=1 and caption has been already set by subfunction 1
  108.       of function 71, it is drawn in the corresponding place of header
  109.   * The skinned window looks as follows:
  110.     * draw external frame of width 1 pixel
  111.       with color 'outer' from the skin
  112.     * draw intermediate frame of width 3 pixel
  113.       with color 'frame' from the skin
  114.     * draw internal frame of width 1 pixel
  115.       with color 'inner' from the skin
  116.     * draw header (on bitmaps from the skin) in a rectangle
  117.       (0,0) - (xsize,_skinh-1)
  118.     * if ysize>=26, fill the working area of the window -
  119.       rectangle with the left upper corner (5,_skinh) and right lower
  120.       (xsize-5,ysize-5) with color indicated in edx
  121.       (taking a gradient into account)
  122.     * define two standard buttons: close and minimize
  123.       (see function 8)
  124.     * if A=1 and edi contains (nonzero) pointer to caption string,
  125.       it is drawn in place in header defined in the skin
  126.     * value _skinh is accessible as the result of call
  127.       subfunction 4 of function 48
  128.  
  129. ======================================================================
  130. ================ Function 1 - put pixel in the window. ===============
  131. ======================================================================
  132. Parameters:
  133.   * eax = 1 - function number
  134.   * ebx = x-coordinate (relative to the window)
  135.   * ecx = y-coordinate (relative to the window)
  136.   * edx = 0x00RRGGBB - color of a pixel
  137.     edx = 0x01xxxxxx - invert color of a pixel
  138.           (low 24 bits are ignored)
  139. Returned value:
  140.   * function does not return value
  141.  
  142. ======================================================================
  143. ============ Function 2 - get the code of the pressed key. ===========
  144. ======================================================================
  145. Takes away the code of the pressed key from the buffer.
  146. Parameters:
  147.   * eax = 2 - function number
  148. Returned value:
  149.   * if the buffer is empty, function returns eax=1
  150.   * if the buffer is not empty, function returns al=0,
  151.     ah=code of the pressed key, high word of eax is zero
  152.   * if there is "hotkey", function returns al=2,
  153.     ah=scancode of the pressed key (0 for control keys),
  154.     high word of eax contains a status of control keys at the moment
  155.     of pressing a hotkey
  156. Remarks:
  157.   * There is a common system buffer of the pressed keys
  158.     by a size of 120 bytes, organized as queue.
  159.   * There is one more common system buffer on 120 "hotkeys".
  160.   * If the application with the inactive window calls this function,
  161.     the buffer of the pressed keys is considered to be empty.
  162.   * By default this function returns ASCII-codes; to switch
  163.     to the scancodes mode (and back) use function 66.
  164.     However, hotkeys are always notificated as scancodes.
  165.   * To find out, what keys correspond to what codes, start
  166.     the application keyascii and scancode.
  167.   * Scancodes come directly from keyboard and are fixed;
  168.     ASCII-codes turn out with usage of the conversion tables,
  169.     which can be set by subfunction 2 of function 21
  170.     and get by subfunction 2 of function 26.
  171.   * As a consequence, ASCII-codes take into account current
  172.     keyboard layout (rus/en) as opposed to scancodes.
  173.   * This function notifies only about those hotkeys, which were
  174.     defined by this thread by subfunction 4 of function 66.
  175.  
  176. ======================================================================
  177. ==================== Function 3 - get system time. ===================
  178. ======================================================================
  179. Parameters:
  180.   * eax = 3 - function number
  181. Returned value:
  182.   * eax = 0x00SSMMHH, where HH:MM:SS = Hours:Minutes:Seconds
  183.   * each item is BCD-number, for example,
  184.     for time 23:59:59 function returns 0x00595923
  185. Remarks:
  186.   * See also subfunction 9 of function 26 - get time from
  187.     the moment of start of the system; it is more convenient, because
  188.     returns simply DWORD-value of the time counter.
  189.   * System time can be set by function 22.
  190.  
  191. ======================================================================
  192. ============ Function 4 - draw text string in the window. ============
  193. ======================================================================
  194. Parameters:
  195.   * eax = 4 - function number
  196.   * ebx = [coordinate on axis x]*65536 + [coordinate on axis y]
  197.   * ecx = 0xXYRRGGBB, where
  198.     * RR, GG, BB specify text color
  199.     * X=ABnn (bits):
  200.       * nn specifies the used font: 0=system monospaced,
  201.         1=system font of variable width
  202.       * A=0 - output esi characters, A=1 - output ASCIIZ-string
  203.       * B=1 - fill background with the color edi
  204.     * Y = Cnnn
  205.       * C=1 redirect the output to the user area, specified in edi
  206.       * nnn - not used in the current, must be 0 (zero)
  207.   * edx = pointer to the beginning of the string
  208.   * esi = for A=0 length of the string, must not exceed 255;
  209.           for A=1 is ignored
  210.   * edi = color to fill background, if B=1
  211.   * edi = pointer to user area, for redirect, if C=1
  212.  
  213. Returned value:
  214.   * function does not return value
  215. Remarks:
  216.   * First system font is read out at loading from the file char.mt,
  217.     second - from char2.mt.
  218.   * Both fonts have height 9 pixels, width of the monospaced font
  219.     is equal to 6 pixels.
  220.   * C=1, pixel depth = 32 bits, user area is as follows:
  221.     dword Xsize
  222.     dword Ysize
  223.     rest of the area = Xsize * Y size * 4
  224.   * You can not use B = 1 and C = 1, at the same time. Since in both
  225.     cases, the register edi is used for different purposes.
  226.  
  227. ======================================================================
  228. ========================= Function 5 - delay. ========================
  229. ======================================================================
  230. Delays execution of the program on the given time.
  231. Parameters:
  232.   * eax = 5 - function number
  233.   * ebx = time in the 1/100 of second
  234. Returned value:
  235.   * function does not return value
  236. Remarks:
  237.   * Passing ebx=0 does not transfer control to the next process
  238.     and does not make any operations at all. If it is really required
  239.     to transfer control to the next process (to complete a current
  240.     time slice), use subfunction 1 of function 68.
  241.  
  242. ======================================================================
  243. ============== Function 6 - read the file from ramdisk. ==============
  244. ======================================================================
  245. Parameters:
  246.   * eax = 6 - function number
  247.   * ebx = pointer to the filename
  248.   * ecx = number of start block, beginning from 1;
  249.     ecx=0 - read from the beginning of the file (same as ecx=1)
  250.   * edx = number of blocks to read;
  251.     edx=0 - read one block (same as edx=1)
  252.   * esi = pointer to memory area for the data
  253. Returned value:
  254.   * eax = file size in bytes, if the file was successfully read
  255.   * eax = -1, if the file was not found
  256. Remarks:
  257.   * This function is out-of-date; function 70 allows
  258.     to fulfil the same operations with the extended possibilities.
  259.   * Block = 512 bytes.
  260.   * For reading all file you can specify the certainly large value
  261.     in edx, for example, edx = -1; but in this case be ready that
  262.     the program will "fall", if the file will appear too large and can
  263.     not be placed in the program memory.
  264.   * The filename must be either in the format 8+3 characters
  265.     (first 8 characters - name itself, last 3 - extension,
  266.     the short names and extensions are supplemented with spaces),
  267.     or in the format 8.3 characters "FILE.EXT"/"FILE.EX "
  268.     (name no more than 8 characters, dot, extension 3 characters
  269.     supplemented if necessary by spaces).
  270.     The filename must be written with capital letters. The terminating
  271.     character with code 0 is not necessary (not ASCIIZ-string).
  272.   * This function does not support folders on the ramdisk.
  273.  
  274. ======================================================================
  275. =============== Function 7 - draw image in the window. ===============
  276. ======================================================================
  277. Paramters:
  278.   * eax = 7 - function number
  279.   * ebx = pointer to the image in the format BBGGRRBBGGRR...
  280.   * ecx = [size on axis x]*65536 + [size on axis y]
  281.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  282. Returned value:
  283.   * function does not return value
  284. Remarks:
  285.   * Coordinates of the image are coordinates of the upper left corner
  286.     of the image relative to the window.
  287.   * Size of the image in bytes is 3*xsize*ysize.
  288.  
  289. ======================================================================
  290. =============== Function 8 - define/delete the button. ===============
  291. ======================================================================
  292. Parameters for button definition:
  293.   * eax = 8 - function number
  294.   * ebx = [coordinate on axis x]*65536 + [size on axis x]
  295.   * ecx = [coordinate on axis y]*65536 + [size on axis y]
  296.   * edx = 0xXYnnnnnn, where:
  297.     * nnnnnn = identifier of the button
  298.     * high (31st) bit of edx is cleared
  299.     * if 30th bit of edx is set - do not draw the button
  300.     * if 29th bit of edx is set - do not draw a frame
  301.       at pressing the button
  302.   * esi = 0x00RRGGBB - color of the button
  303. Parameters for button deleting:
  304.   * eax = 8 - function number
  305.   * edx = 0x80nnnnnn, where nnnnnn - identifier of the button
  306. Returned value:
  307.   * function does not return value
  308. Remarks:
  309.   * Sizes of the button must be more than 0 and less than 0x8000.
  310.   * For skinned windows definition of the window
  311.     (call of 0th function) creates two standard buttons -
  312.     for close of the window with identifier 1 and
  313.     for minimize of the window with identifier 0xffff.
  314.   * The creation of two buttons with same identifiers is admitted.
  315.   * The button with the identifier 0xffff at pressing is interpreted
  316.     by the system as the button of minimization, the system handles
  317.     such pressing independently, not accessing to the application.
  318.     In rest it is usual button.
  319.   * Total number of buttons for all applications is limited to 4095.
  320.  
  321. ======================================================================
  322. ============ Function 9 - information on execution thread. ===========
  323. ======================================================================
  324. Parameters:
  325.   * eax = 9 - function number
  326.   * ebx = pointer to 1-Kb buffer
  327.   * ecx = number of the slot of the thread
  328.     ecx = -1 - get information on the current thread
  329. Returned value:
  330.   * eax = maximum number of the slot of a thread
  331.   * buffer pointed to by ebx contains the following information:
  332.     * +0: dword: usage of the processor (how many time units
  333.       per second leaves on execution of this thread)
  334.     * +4: word: position of the window of thread in the window stack
  335.     * +6: word: (has no relation to the specified thread)
  336.       number of the thread slot, which window has in the window stack
  337.       position ecx
  338.     * +8: word: reserved
  339.     * +10 = +0xA: 11 bytes: name of the process
  340.       (name of the started file - executable file without extension)
  341.     * +21 = +0x15: byte: reserved, this byte is not changed
  342.     * +22 = +0x16: dword: address of the process in memory
  343.     * +26 = +0x1A: dword: size of used memory - 1
  344.     * +30 = +0x1E: dword: identifier (PID/TID)
  345.     * +34 = +0x22: dword: coordinate of the thread window on axis x
  346.     * +38 = +0x26: dword: coordinate of the thread window on axis y
  347.     * +42 = +0x2A: dword: size of the thread window on axis x
  348.     * +46 = +0x2E: dword: size of the thread window on axis y
  349.     * +50 = +0x32: word: status of the thread slot:
  350.       * 0 = thread is running
  351.       * 1 = thread is suspended
  352.       * 2 = thread is suspended while waiting for event
  353.       * 3 = thread is terminating as a result of call to function -1
  354.         or under duress as a result of call to subfunction 2
  355.         of function 18 or termination of the system
  356.       * 4 = thread is terminating as a result of exception
  357.       * 5 = thread waits for event
  358.       * 9 = requested slot is free, all other information on the slot
  359.         is not meaningful
  360.     * +52 = +0x34: word: reserved, this word is not changed
  361.     * +54 = +0x36: dword: coordinate of the client area on axis x
  362.     * +58 = +0x3A: dword: coordinate of the client area on axis y
  363.     * +62 = +0x3E: dword: width of the client area
  364.     * +66 = +0x42: dword: height of the client area
  365.     * +70 = +0x46: byte: state of the window - bitfield
  366.       * bit 0 (mask 1): window is maximized
  367.       * bit 1 (mask 2): window is minimized to panel
  368.       * bit 2 (mask 4): window is rolled up
  369.     * +71 = +0x47: dword: event mask
  370. Remarks:
  371.   * Slots are numbered starting from 1.
  372.   * Returned value is not a total number of threads, because there
  373.     can be free slots.
  374.   * When process is starting, system automatically creates
  375.     execution thread.
  376.   * Function gives information on the thread. Each process has
  377.     at least one thread. One process can create many threads,
  378.     in this case each thread has its own slot and the fields
  379.     +10, +22, +26 in these slots coincide.
  380.     Applications have no common way to define whether two threads
  381.     belong to one process.
  382.   * The active window - window on top of the window stack -
  383.     receives the messages on a keyboard input. For such window
  384.     the position in the window stack coincides with returned value.
  385.   * Slot 1 corresponds to special system thread, for which:
  386.     * the window is in the bottom of the window stack, the fields
  387.       +4 and +6 contain value 1
  388.     * name of the process - "OS/IDLE" (supplemented by spaces)
  389.     * address of the process in memory is 0, size of used memory is
  390.       16 Mb (0x1000000)
  391.     * PID=1
  392.     * coordinates and sizes of the window and the client area are by
  393.       convention set to 0
  394.     * status of the slot is always 0 (running)
  395.     * the execution time adds of time leaving on operations itself
  396.       and idle time in waiting for interrupt (which can be got by call
  397.       to subfunction 4 of function 18).
  398.   * Beginning from slot 2, the normal applications are placed.
  399.   * The normal applications are placed in memory at the address
  400.     0 (kernel constant 'std_application_base_address').
  401.     There is no intersection, as each process has its own page table.
  402.   * At creation of the thread it is assigned the slot
  403.     in the system table and identifier (Process/Thread IDentifier =
  404.     PID/TID), which do not vary with time for given thread.
  405.     After completion of the thread its slot can be anew used
  406.     for another thread. The thread identifier can not be assigned
  407.     to other thread even after completion of this thread.
  408.     Identifiers, assigned to new threads, grow monotonously.
  409.   * If the thread has not yet defined the window by call to
  410.     function 0, the position and the sizes
  411.     of its window are considered to be zero.
  412.   * Coordinates of the client area are relative to the window.
  413.   * At the moment only the part of the buffer by a size
  414.     71 = 0x37 bytes is used. Nevertheless it is recommended to use
  415.     1-Kb buffer for the future compatibility, in the future
  416.     some fields can be added.
  417.  
  418. ======================================================================
  419. ==================== Function 10 - wait for event. ===================
  420. ======================================================================
  421. If the message queue is empty, waits for appearance of the message
  422. in queue. In this state thread does not consume CPU time.
  423. Then reads out the message from queue.
  424.  
  425. Parameters:
  426.   * eax = 10 - function number
  427. Returned value:
  428.   * eax = event (see the list of events)
  429. Remarks:
  430.   * Those events are taken into account only which enter into
  431.     a mask set by function 40. By default it is
  432.     redraw, key and button events.
  433.   * To check, whether there is a message in queue, use function 11.
  434.     To wait for no more than given time, use function 23.
  435.  
  436. ======================================================================
  437. =============== Function 11 - check for event, no wait. ==============
  438. ======================================================================
  439. If the message queue contains event, function reads out
  440. and return it. If the queue is empty, function returns 0.
  441. Parameters:
  442.   * eax = 11 - function number
  443. Returned value:
  444.   * eax = 0 - message queue is empty
  445.   * else eax = event (see the list of events)
  446. Remarks:
  447.   * Those events are taken into account only, which enter into
  448.     a mask set by function 40. By default it is
  449.     redraw, key and button events.
  450.   * To wait for event, use function 10.
  451.     To wait for no more than given time, use function 23.
  452.  
  453. ======================================================================
  454. =============== Function 12 - begin/end window redraw. ===============
  455. ======================================================================
  456.  
  457. ---------------- Subfunction 1 - begin window redraw. ----------------
  458. Parameters:
  459.   * eax = 12 - function number
  460.   * ebx = 1 - subfunction number
  461. Returned value:
  462.   * function does not return value
  463.  
  464. ----------------- Subfunction 2 - end window redraw. -----------------
  465. Parameters:
  466.   * eax = 12 - function number
  467.   * ebx = 2 - subfunction number
  468. Returned value:
  469.   * function does not return value
  470. Remarks:
  471.   * Subfunction 1 deletes all buttons defined with
  472.     function 8, they must be defined again.
  473.  
  474. ======================================================================
  475. ============ Function 13 - draw a rectangle in the window. ===========
  476. ======================================================================
  477. Parameters:
  478.   * eax = 13 - function number
  479.   * ebx = [coordinate on axis x]*65536 + [size on axis x]
  480.   * ecx = [coordinate on axis y]*65536 + [size on axis y]
  481.   * edx = color 0xRRGGBB or 0x80RRGGBB for gradient fill
  482. Returned value:
  483.   * function does not return value
  484. Remarks:
  485.   * Coordinates are understood as coordinates of the left upper corner
  486.     of a rectangle relative to the window.
  487.  
  488. ======================================================================
  489. =================== Function 14 - get screen size. ===================
  490. ======================================================================
  491. Parameters:
  492.   * eax = 14 - function number
  493. Returned value:
  494.   * eax = [xsize]*65536 + [ysize], where
  495.   * xsize = x-coordinate of the right lower corner of the screen =
  496.             horizontal size - 1
  497.   * ysize = y-coordinate of the right lower corner of the screen =
  498.             vertical size - 1
  499. Remarks:
  500.   * See also subfunction 5 of function 48 - get sizes of
  501.     working area of the screen.
  502.  
  503. ======================================================================
  504. == Function 15, subfunction 1 - set a size of the background image. ==
  505. ======================================================================
  506. Parameters:
  507.   * eax = 15 - function number
  508.   * ebx = 1 - subfunction number
  509.   * ecx = width of the image
  510.   * edx = height of the image
  511. Returned value:
  512.   * function does not return value
  513. Remarks:
  514.   * Before calling subfunctions 2 and 5 you should call this function
  515.     to set image size!
  516.   * For update of the screen (after completion of a series of commands
  517.     working with a background) call subfunction 3.
  518.   * There is a pair function for get size of the background image -
  519.     subfunction 1 of function 39.
  520.  
  521. ======================================================================
  522. === Function 15, subfunction 2 - put pixel on the background image. ==
  523. ======================================================================
  524. Parameters:
  525.   * eax = 15 - function number
  526.   * ebx = 2 - subfunction number
  527.   * ecx = offset
  528.   * edx = color of a pixel 0xRRGGBB
  529. Returned value:
  530.   * function does not return value
  531. Remarks:
  532.   * Offset for a pixel with coordinates (x,y) is calculated as
  533.     (x+y*xsize)*3.
  534.   * If the given offset exceeds size set by subfunction 1,
  535.     the call is ignored.
  536.   * For update of the screen (after completion of a series of commands
  537.     working with a background) call subfunction 3.
  538.   * There is a pair function for get pixel on the background image -
  539.     subfunction 2 of function 39.
  540.  
  541. ======================================================================
  542. =========== Function 15, subfunction 3 - redraw background. ==========
  543. ======================================================================
  544. Parameters:
  545.   * eax = 15 - function number
  546.   * ebx = 3 - subfunction number
  547. Returned value:
  548.   * function does not return value
  549.  
  550. ======================================================================
  551. == Function 15, subfunction 4 - set drawing mode for the background. =
  552. ======================================================================
  553. Parameters:
  554.   * eax = 15 - function number
  555.   * ebx = 4 - subfunction number
  556.   * ecx = drawing mode:
  557.     * 1 = tile
  558.     * 2 = stretch
  559. Returned value:
  560.   * function does not return value
  561. Remarks:
  562.   * For update of the screen (after completion of a series of commands
  563.     working with a background) call subfunction 3.
  564.   * There is a pair function for get drawing mode of the background -
  565.     subfunction 4 of function 39.
  566.  
  567. ======================================================================
  568. ===================== Function 15, subfunction 5 =====================
  569. ============ Put block of pixels on the background image. ============
  570. ======================================================================
  571. Parameters:
  572.   * eax = 15 - function number
  573.   * ebx = 5 - subfunction number
  574.   * ecx = pointer to the data in the format BBGGRRBBGGRR...
  575.   * edx = offset in data of the background image
  576.   * esi = size of data in bytes = 3 * number of pixels
  577. Returned value:
  578.   * function does not return value
  579. Remarks:
  580.   * Offset and size are not checked for correctness.
  581.   * Color of each pixel is stored as 3-bytes value BBGGRR.
  582.   * Pixels of the background image are written sequentially
  583.     from left to right, from up to down.
  584.   * Offset of pixel with coordinates (x,y) is (x+y*xsize)*3.
  585.   * For update of the screen (after completion of a series of commands
  586.     working with a background) call subfunction 3.
  587.  
  588. ======================================================================
  589. ===================== Function 15, subfunction 6 =====================
  590. ======== Map background data to the address space of process. ========
  591. ======================================================================
  592. Parameters:
  593.   * eax = 15 - function number
  594.   * ebx = 6 - subfunction number
  595. Returned value:
  596.   * eax = pointer to background data, 0 if error
  597. Remarks:
  598.   * Mapped data are available for read and write.
  599.   * Size of background data is 3*xsize*ysize. The system blocks
  600.     changes of background sizes while process works with mapped data.
  601.   * Color of each pixel is stored as 3-bytes value BBGGRR.
  602.   * Pixels of the background image are written sequentially
  603.     from left to right, from up to down.
  604.  
  605. ======================================================================
  606. ===== Function 15, subfunction 7 - close mapped background data. =====
  607. ======================================================================
  608. Parameters:
  609.   * eax = 15 - function number
  610.   * ebx = 7 - subfunction number
  611.   * ecx = pointer to mapped data
  612. Returned value:
  613.   * eax = 1 - success, 0 - error
  614.  
  615. ======================================================================
  616. ===================== Function 15, subfunction 8 =====================
  617. ============= Get coordinates of last draw the background ============
  618. ======================================================================
  619. Parameters:
  620.   * eax = 15 - function number
  621.   * ebx = 8 - subfunction number
  622. Returned value:
  623.   * eax = [left]*65536 + [right]
  624.   * ebx = [top]*65536 + [bottom]
  625. Remarks:
  626.   * (left,top) are coordinates of the left upper corner,
  627.     (right,bottom) are coordinates of the right lower one.
  628.   * For receiving more reliable information, call the function
  629.     immediately after the event:
  630.              5 = kernel finished redrawing of the desktop background
  631.  
  632. ======================================================================
  633. ===================== Function 15, subfunction 9 =====================
  634. ============= Redraws a rectangular part of the background ===========
  635. ======================================================================
  636. Parameters:
  637.   * eax = 15 - function number
  638.   * ebx = 9 - subfunction number
  639.   * ecx = [left]*65536 + [right]
  640.   * edx = [top]*65536 + [bottom]
  641. Returned value:
  642.   * function does not return value
  643. Remarks:
  644.   * (left,top) are coordinates of the left upper corner,
  645.     (right,bottom) are coordinates of the right lower one.
  646.   * If parameters are set incorrectly then background is not redrawn.
  647.  
  648. ======================================================================
  649. =============== Function 16 - save ramdisk on a floppy. ==============
  650. ======================================================================
  651. Parameters:
  652.   * eax = 16 - function number
  653.   * ebx = 1 or ebx = 2 - on which floppy save
  654. Returned value:
  655.   * eax = 0 - success
  656.   * eax = 1 - error
  657.  
  658. ======================================================================
  659. ======= Function 17 - get the identifier of the pressed button. ======
  660. ======================================================================
  661. Takes away the code of the pressed button from the buffer.
  662. Parameters:
  663.   * eax = 17 - function number
  664. Returned value:
  665.   * if the buffer is empty, function returns eax=1
  666.   * if the buffer is not empty:
  667.     * high 24 bits of eax contain button identifier (in particular,
  668.       ah contains low byte of the identifier; if all buttons have
  669.       the identifier less than 256, ah is enough to distinguish)
  670.     * al = 0 - the button was pressed with left mouse button
  671.     * al = bit corresponding to used mouse button otherwise
  672. Remarks:
  673.   * "Buffer" keeps only one button, at pressing the new button the
  674.     information about old is lost.
  675.   * The call of this function by an application with inactive window
  676.     will return answer "buffer is empty".
  677.   * Returned value for al corresponds to the state of mouse buttons
  678.     as in subfunction 2 of function 37 at the beginning
  679.     of button press, excluding lower bit, which is cleared.
  680.  
  681. ======================================================================
  682. ===================== Function 18, subfunction 1 =====================
  683. ============= Make deactive the window of the given thread. ==========
  684. ======================================================================
  685. Parameters:
  686.   * eax = 18 - function number
  687.   * ebx = 1 - subfunction number
  688.   * ecx = number of the thread slot
  689. Returned value:
  690.   * function does not return value
  691.  
  692. ======================================================================
  693. = Function 18, subfunction 2 - terminate process/thread by the slot. =
  694. ======================================================================
  695. Parameters:
  696.   * eax = 18 - function number
  697.   * ebx = 2 - subfunction number
  698.   * ecx = number of the slot of process/thread
  699. Returned value:
  700.   * function does not return value
  701. Remarks:
  702.   * It is impossible to terminate system thread OS/IDLE (with
  703.     number of the slot 1),
  704.     it is possible to terminate any normal process/thread.
  705.   * See also subfunction 18 - terminate
  706.     process/thread by the identifier.
  707.  
  708. ======================================================================
  709. ===================== Function 18, subfunction 3 =====================
  710. ============= Make active the window of the given thread. ============
  711. ======================================================================
  712. Parameters:
  713.   * eax = 18 - function number
  714.   * ebx = 3 - subfunction number
  715.   * ecx = number of the thread slot
  716. Returned value:
  717.   * function does not return value
  718. Remarks:
  719.   * If correct, but nonexistent slot is given,
  720.     some window is made active.
  721.   * To find out, which window is active, use subfunction 7.
  722.  
  723. ======================================================================
  724. ===================== Function 18, subfunction 4 =====================
  725. =========== Get counter of idle time units per one second. ===========
  726. ======================================================================
  727. Idle time units are units, in which the processor stands idle
  728. in waiting for interrupt (in the command 'hlt').
  729.  
  730. Parameters:
  731.   * eax = 18 - function number
  732.   * ebx = 4 - subfunction number
  733. Returned value:
  734.   * eax = value of the counter of idle time units per one second
  735.  
  736. ======================================================================
  737. ========== Function 18, subfunction 5 - get CPU clock rate. ==========
  738. ======================================================================
  739. Parameters:
  740.   * eax = 18 - function number
  741.   * ebx = 5 - subfunction number
  742. Returned value:
  743.   * eax = clock rate (modulo 2^32 clock ticks = 4GHz)
  744.  
  745. ======================================================================
  746.  Function 18, subfunction 6 - save ramdisk to the file on hard drive.
  747. ======================================================================
  748. Parameters:
  749.   * eax = 18 - function number
  750.   * ebx = 6 - subfunction number
  751.   * ecx = pointer to the full path to file
  752.     (for example, "/hd0/1/kolibri/kolibri.img")
  753. Returned value:
  754.   * eax = 0 - success
  755.   * else eax = error code of the file system
  756. Remarks:
  757.   * All folders in the given path must exist, otherwise function
  758.     returns value 5, "file not found".
  759.  
  760. ======================================================================
  761. =========== Function 18, subfunction 7 - get active window. ==========
  762. ======================================================================
  763. Parameters:
  764.   * eax = 18 - function number
  765.   * ebx = 7 - subfunction number
  766. Returned value:
  767.   * eax = number of the active window
  768.     (number of the slot of the thread with active window)
  769. Remarks:
  770.   * Active window is at the top of the window stack and receives
  771.     messages on all keyboard input.
  772.   * To make a window active, use subfunction 3.
  773.  
  774. ======================================================================
  775. == Function 18, subfunction 8 - disable/enable the internal speaker. =
  776. ======================================================================
  777. If speaker sound is disabled, all calls to subfunction 55 of
  778. function 55 are ignored. If speaker sound is enabled,
  779. they are routed on builtin speaker.
  780.  
  781. ------------------- Subsubfunction 1 - get status. -------------------
  782. Parameters:
  783.   * eax = 18 - function number
  784.   * ebx = 8 - subfunction number
  785.   * ecx = 1 - number of the subsubfunction
  786. Returned value:
  787.   * eax = 0 - speaker sound is enabled; 1 - disabled
  788.  
  789. ----------------- Subsubfunction 2 - toggle status. ------------------
  790. Toggles states of disable/enable.
  791. Parameters:
  792.   * eax = 18 - function number
  793.   * ebx = 8 - subfunction number
  794.   * ecx = 2 - number of the subsubfunction
  795. Returned value:
  796.   * function does not return value
  797.  
  798. ======================================================================
  799. == Function 18, subfunction 9 - system shutdown with the parameter. ==
  800. ======================================================================
  801. Parameters:
  802.   * eax = 18 - function number
  803.   * ebx = 9 - subfunction number
  804.   * ecx = parameter:
  805.     * 2 = turn off computer
  806.     * 3 = reboot computer
  807.     * 4 = restart the kernel from the file 'kernel.mnt' on ramdisk
  808. Returned value:
  809.   * at incorrect ecx the registers do not change (i.e. eax=18)
  810.   * by correct call function always returns eax=0
  811.     as the tag of success
  812. Remarks:
  813.   * Do not rely on returned value by incorrect call, it can be
  814.     changed in future versions of the kernel.
  815.  
  816. ======================================================================
  817. ===== Function 18, subfunction 10 - minimize application window. =====
  818. ======================================================================
  819. Minimizes the own window.
  820. Parameters:
  821.   * eax = 18 - function number
  822.   * ebx = 10 - subfunction number
  823. Returned value:
  824.   * function does not return value
  825. Remarks:
  826.   * The minimized window from the point of view of function 9
  827.     keeps position and sizes.
  828.   * Restoring of an application window occurs at its activation by
  829.     subfunction 3.
  830.   * Usually there is no necessity to minimize/restire a window
  831.     obviously: minimization of a window is carried out by the system
  832.     at pressing the minimization button (for skinned windows
  833.     it is defined automatically by function 0,
  834.     for other windows it can be defined manually by function 8),
  835.     restore of a window is done by the application '@panel'.
  836.  
  837. ======================================================================
  838.  Function 18, subfunction 11 - get information on the disk subsystem.
  839. ======================================================================
  840. Parameters:
  841.   * eax = 18 - function number
  842.   * ebx = 11 - subfunction number
  843.   * ecx = type of the table:
  844.     * 1 = short version, 10 bytes
  845.     * 2 = full version, 65536 bytes
  846.   * edx = pointer to the buffer (in the application) for the table
  847. Returned value:
  848.   * function does not return value
  849. Format of the table: short version:
  850.   * +0: byte: information about FDD's (drives for floppies),
  851.     AAAABBBB, where AAAA gives type of the first drive, BBBB -
  852.     of the second regarding to the following list:
  853.     * 0 = there is no drive
  854.     * 1 = 360Kb, 5.25''
  855.     * 2 = 1.2Mb, 5.25''
  856.     * 3 = 720Kb, 3.5''
  857.     * 4 = 1.44Mb, 3.5''
  858.     * 5 = 2.88Mb, 3.5'' (such drives are not used anymore)
  859.     For example, for the standard configuration from one 1.44-drive
  860.     here will be 40h, and for the case 1.2Mb on A: and 1.44Mb on B:
  861.     the value is 24h.
  862.   * +1: byte: information about hard disks and CD-drives, AABBCCDD,
  863.     where AA corresponds to the controller IDE0, ..., DD - IDE3:
  864.     * 0 = device is absent
  865.     * 1 = hard drive
  866.     * 2 = CD-drive
  867.     For example, in the case HD on IDE0 and CD on IDE2
  868.     this field contains 48h.
  869.   * +2: 4 db: number of the retrieved partitions on hard disks
  870.     at accordingly IDE0,...,IDE3.
  871.     If the hard disk on IDEx is absent, appropriate byte is zero,
  872.     otherwise it shows number of the recognized partitions, which
  873.     can be not presented (if the drive is not formatted or if
  874.     the file system is not supported). Current version of the kernel
  875.     supports only FAT16, FAT32 and NTFS for hard disks.
  876.   * +6: 4 db: reserved
  877. Format of the table: full version:
  878.   * +0: 10 db: same as for the short version
  879.   * +10: 100 db: data for the first partition
  880.   * +110: 100 db: data for the second partition
  881.   * ...
  882.   * +10+100*(n-1): 100 db: data for the last partition
  883. The partitions are located as follows: at first sequentially all
  884. recoginzed partitions on HD on IDE0 (if present),
  885. then on HD on IDE1 (if present) and so on up to IDE3.
  886. Format of the information about partition
  887. (at moment only FAT is supported):
  888.   * +0: dword: first physical sector of the partition
  889.   * +4: dword: last physical sector of the partition
  890.     (belongs to the partition)
  891.   * +8: byte: file system type:
  892.     16=FAT16, 32=FAT32, 1=NTFS
  893.   * other data are dependent on file system, are modified with
  894.     kernel modifications and therefore are not described
  895. Remarks:
  896.   * The short table can be used for obtaining the information about
  897.     available devices.
  898.  
  899. ======================================================================
  900. ========== Function 18, subfunction 13 - get kernel version. =========
  901. ======================================================================
  902. Parameters:
  903.   * eax = 18 - function number
  904.   * ebx = 13 - subfunction number
  905.   * ecx = pointer to the buffer (not less than 16 bytes), where
  906.     the information will be placed
  907. Returned value:
  908.   * function does not return value
  909. Structure of the buffer:
  910. db a,b,c,d for version a.b.c.d
  911. db 0: reserved
  912. dd REV - kernel SVN revision number
  913. For Kolibri 0.7.7.0+ kernel:
  914. db 0,7,7,0
  915. db 0
  916. dd 1675
  917.  
  918. ======================================================================
  919. ======= Function 18, subfunction 14 - wait for screen retrace. =======
  920. ======================================================================
  921. Waits for the beginning of retrace of the scanning ray of the screen
  922. monitor.
  923. Parameters:
  924.   * eax = 18 - function number
  925.   * ebx = 14 - subfunction number
  926. Returned value:
  927.   * eax = 0 as the tag of success
  928. Remarks:
  929.   * Function is intended only for active high-efficiency graphics
  930.     applications; is used for smooth output of a graphics.
  931.  
  932. ======================================================================
  933. == Function 18, subfunction 15 - center mouse cursor on the screen. ==
  934. ======================================================================
  935. Parameters:
  936.   * eax = 18 - function number
  937.   * ebx = 15 - subfunction number
  938. Returned value:
  939.   * eax = 0 as the tag of success
  940.  
  941. ======================================================================
  942. ========= Function 18, subfunction 16 - get size of free RAM. ========
  943. ======================================================================
  944. Parameters:
  945.   * eax = 18 - function number
  946.   * ebx = 16 - subfunction number
  947. Returned value:
  948.   * eax = size of free memory in kilobytes
  949.  
  950. ======================================================================
  951. ======== Function 18, subfunction 17 - get full amount of RAM. =======
  952. ======================================================================
  953. Parameters:
  954.   * eax = 18 - function number
  955.   * ebx = 17 - subfunction number
  956. Returned value:
  957.   * eax = total size of existing memory in kilobytes
  958.  
  959. ======================================================================
  960. ===================== Function 18, subfunction 18 ====================
  961. ============= Terminate process/thread by the identifier. ============
  962. ======================================================================
  963. Parameters:
  964.   * eax = 18 - function number
  965.   * ebx = 18 - subfunction number
  966.   * ecx = identifer of process/thread (PID/TID)
  967. Returned value:
  968.   * eax = 0 - success
  969.   * eax = -1 - error (process is not found or is system)
  970. Remarks:
  971.   * It is impossible to terminate system thread OS/IDLE (identifier
  972.     1), it is possible to terminate any normal process/thread.
  973.   * See also subfunction 2 - terminate
  974.     process/thread by given slot.
  975.  
  976. ======================================================================
  977. ======== Function 18, subfunction 19 - get/set mouse features. =======
  978. ======================================================================
  979.  
  980. ---------------- Subsubfunction 0 - get mouse speed. -----------------
  981. Parameters:
  982.   * eax = 18 - function number
  983.   * ebx = 19 - subfunction number
  984.   * ecx = 0 - subsubfunction number
  985. Returned value:
  986.   * eax = current mouse speed
  987.  
  988. ---------------- Subsubfunction 1 - set mouse speed. -----------------
  989. Parameters:
  990.   * eax = 18 - function number
  991.   * ebx = 19 - subfunction number
  992.   * ecx = 1 - subsubfunction number
  993.   * edx = new value for speed
  994. Returned value:
  995.   * function does not return value
  996.  
  997. ---------------- Subsubfunction 2 - get mouse delay. -----------------
  998. Parameters:
  999.   * eax = 18 - function number
  1000.   * ebx = 19 - subfunction number
  1001.   * ecx = 2 - subsubfunction number
  1002. Returned value:
  1003.   * eax = current mouse delay
  1004.  
  1005. ---------------- Subsubfunction 3 - set mouse delay. -----------------
  1006. Parameters:
  1007.   * eax = 18 - function number
  1008.   * ebx = 19 - subfunction number
  1009.   * ecx = 3 - subsubfunction number
  1010.   * edx = new value for mouse delay
  1011. Returned value:
  1012.   * function does not return value
  1013.  
  1014. ----------- Subsubfunction 4 - set mouse pointer position. -----------
  1015. Parameters:
  1016.   * eax = 18 - function number
  1017.   * ebx = 19 - subfunction number
  1018.   * ecx = 4 - subsubfunction number
  1019.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  1020. Returned value:
  1021.   * function does not return value
  1022.  
  1023. -------- Subsubfunction 5 - simulate state of mouse buttons. ---------
  1024. Parameters:
  1025.   * eax = 18 - function number
  1026.   * ebx = 19 - subfunction number
  1027.   * ecx = 5 - subsubfunction number
  1028.   * edx = information about emulated state of mouse buttons:
  1029.     (same as return value in subfunction 2 of function 37)
  1030.     * bit 0 is set = left button is pressed
  1031.     * bit 1 is set = right button is pressed
  1032.     * bit 2 is set = middle button is pressed
  1033.     * bit 3 is set = 4th button is pressed
  1034.     * bit 4 is set = 5th button is pressed
  1035. Returned value:
  1036.   * function does not return value
  1037. Remarks:
  1038.   * It is recommended to set speed of the mouse (in subsubfunction 1)
  1039.     from 1 up to 9. The installed value is not inspected by the kernel
  1040.     code, so set it carefully, at incorrect value the cursor
  1041.     can "freeze". Speed of the mouse can be regulated through the
  1042.     application SETUP.
  1043.   * Recommended delay of the mouse (in subsubfunction 3) = 10. Lower
  1044.     value is not handled by COM mice. At the very large values the
  1045.     movement of the mouse on 1 pixel is impossible and the cursor will
  1046.     jump on the value of installed speed (subsubfunction 1). The
  1047.     installed value is not inspected by the kernel code.
  1048.     Mouse delay can be regulated through the application SETUP.
  1049.   * The subsubfunction 4 does not check the passed value. Before
  1050.     its call find out current screen resolution (with function 14)
  1051.     and check that the value of position is inside the limits of the
  1052.     screen.
  1053.  
  1054. ======================================================================
  1055. ======== Function 18, subfunction 20 - get information on RAM. =======
  1056. ======================================================================
  1057. Parameters:
  1058.   * eax = 18 - function number
  1059.   * ebx = 20 - subfunction number
  1060.   * ecx = pointer to the buffer for information (36 bytes)
  1061. Returned value:
  1062.   * eax = total size of existing RAM in pages
  1063.     or -1 if error has occured
  1064.   * buffer pointed to by ecx contains the following information:
  1065.     * +0:  dword: total size of existing RAM in pages
  1066.     * +4:  dword: size of free RAM in pages
  1067.     * +8:  dword: number of page faults (exceptions #PF)
  1068.                  in applications
  1069.     * +12: dword: size of kernel heap in bytes
  1070.     * +16: dword: free in kernel heap in bytes
  1071.     * +20: dword: total number of memory blocks in kernel heap
  1072.     * +24: dword: number of free memory blocks in kernel heap
  1073.     * +28: dword: size of maximum free block in kernel heap
  1074.                  (reserved)
  1075.     * +32: dword: size of maximum allocated block in kernel heap
  1076.                  (reserved)
  1077.  
  1078. ======================================================================
  1079. ===================== Function 18, subfunction 21 ====================
  1080. ======== Get slot number of process/thread by the identifier. ========
  1081. ======================================================================
  1082. Parameters:
  1083.   * eax = 18 - function number
  1084.   * ebx = 21 - subfunction number
  1085.   * ecx = identifer of process/thread (PID/TID)
  1086. Returned value:
  1087.   * eax = 0 - error (invalid identifier)
  1088.   * otherwise eax = slot number
  1089.  
  1090. ======================================================================
  1091. ===================== Function 18, subfunction 22 ====================
  1092. ============== Operations with window of another thread. =============
  1093. ======================================================================
  1094. Parameters:
  1095.   * eax = 18 - function number
  1096.   * ebx = 22 - subfunction number
  1097.   * ecx = operation type:
  1098.     * 0 = minimize window of the thread with given slot number
  1099.     * 1 = minimize window of the thread with given identifier
  1100.     * 2 = restore window of the thread with given slot number
  1101.     * 3 = restore window of the thread with given identifier
  1102.   * edx = parameter (slot number or PID/TID)
  1103. Returned value:
  1104.   * eax = 0 - success
  1105.   * eax = -1 - error (invalid identifier)
  1106. Remarks:
  1107.   * The thread can minimize its window with subfunction 10.
  1108.   * One can restore and activate window simultaneously with
  1109.     subfunction 3 (which requires slot number).
  1110.  
  1111. ======================================================================
  1112. ==================== Function 20 - MIDI interface. ===================
  1113. ======================================================================
  1114.  
  1115. ----------------------- Subfunction 1 - reset ------------------------
  1116. Parameters:
  1117.   * eax = 20 - function number
  1118.   * ebx = 1 - subfunction number
  1119.  
  1120. -------------------- Subfunction 2 - output byte ---------------------
  1121. Parameters:
  1122.   * eax = 20 - function number
  1123.   * ebx = 2 - subfunction number
  1124.   * cl = byte for output
  1125. Returned value (is the same for both subfunctions):
  1126.   * eax = 0 - success
  1127.   * eax = 1 - base port is not defined
  1128. Remarks:
  1129.   * Previously the base port must be defined by
  1130.     subfunction 1 of function 21.
  1131.  
  1132. ======================================================================
  1133. ======== Function 21, subfunction 1 - set MPU MIDI base port. ========
  1134. ======================================================================
  1135. Parameters:
  1136.   * eax = 21 - function number
  1137.   * ebx = 1 - subfunction number
  1138.   * ecx = number of base port
  1139. Returned value
  1140.   * eax = 0 - success
  1141.   * eax = -1 - erratic number of a port
  1142. Remarks:
  1143.   * Number of a port must satisfy to conditions 0x100<=ecx<=0xFFFF.
  1144.   * The installation of base is necessary for function 20.
  1145.   * To get base port use subfunction 1 of function 26.
  1146.  
  1147. ======================================================================
  1148. ========== Function 21, subfunction 2 - set keyboard layout. =========
  1149. ======================================================================
  1150. Keyboard layout is used to convert keyboard scancodes to ASCII-codes,
  1151. which will be read by function 2.
  1152. Parameters:
  1153.   * eax = 21 - function number
  1154.   * ebx = 2 - subfunction number
  1155.   * ecx = which layout to set:
  1156.     * 1 = normal layout
  1157.     * 2 = layout at pressed Shift
  1158.     * 3 = layout at pressed Alt
  1159.   * edx = pointer to layout - table of length 128 bytes
  1160. Or:
  1161.   * ecx = 9
  1162.   * dx = country identifier (1=eng, 2=fi, 3=ger, 4=rus)
  1163. Returned value:
  1164.   * eax = 0 - success
  1165.   * eax = 1 - incorrect parameter
  1166. Remarks:
  1167.   * If Alt is pressed, the layout with Alt is used;
  1168.     if Alt is not pressed, but Shift is pressed,
  1169.     the layout with Shift is used;
  1170.     if Alt and Shift are not pressed, but Ctrl is pressed, the normal
  1171.     layout is used and then from the code is subtracted 0x60;
  1172.     if no control key is pressed, the normal layout is used.
  1173.   * To get layout and country identifier use
  1174.     subfunction 2 of function 26.
  1175.   * Country identifier is global system variable, which is not used
  1176.     by the kernel itself; however the application '@panel' displays
  1177.     the corresponding icon.
  1178.   * The application @panel switches layouts on user request.
  1179.  
  1180. ======================================================================
  1181. ============== Function 21, subfunction 3 - set CD base. =============
  1182. ======================================================================
  1183. Parameters:
  1184.   * eax = 21 - function number
  1185.   * ebx = 3 - subfunction number
  1186.   * ecx = CD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1187. Returned value:
  1188.   * eax = 0
  1189. Remarks:
  1190.   * CD base is used by function 24.
  1191.   * To get CD base use subfunction 3 of function 26.
  1192.  
  1193. ======================================================================
  1194. ========== Function 21, subfunction 5 - set system language. =========
  1195. ======================================================================
  1196. Parameters:
  1197.   * eax = 21 - function number
  1198.   * ebx = 5 - subfunction number
  1199.   * ecx = system language (1=eng, 2=fi, 3=ger, 4=rus)
  1200. Returned value:
  1201.   * eax = 0
  1202. Remarks:
  1203.   * System language is global system variable and is not used
  1204.     by the kernel itself, however application @panel draws the
  1205.     appropriate icon.
  1206.   * Function does not check for correctness, as the kernel does not
  1207.     use this variable.
  1208.   * To get system language use subfunction 5 of function 26.
  1209.  
  1210. ======================================================================
  1211. ============== Function 21, subfunction 7 - set HD base. =============
  1212. ======================================================================
  1213. The HD base defines hard disk to write with usage of obsolete
  1214. syntax /HD in obsolete function 58; at usage of modern syntax
  1215. /HD0,/HD1,/HD2,/HD3 base is set automatically.
  1216. Parameters:
  1217.   * eax = 21 - function number
  1218.   * ebx = 7 - subfunction number
  1219.   * ecx = HD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1220. Returned value:
  1221.   * eax = 0
  1222. Remarks:
  1223.   * Any application at any time can change the base.
  1224.   * Do not change base, when any application works with hard disk.
  1225.     If you do not want system bugs.
  1226.   * To get HD base use subfunction 7 of function 26.
  1227.   * It is also necessary to define used partition of hard disk by
  1228.     subfunction 8.
  1229.  
  1230. ======================================================================
  1231. ========= Function 21, subfunction 8 - set used HD partition. ========
  1232. ======================================================================
  1233. The HD partition defines partition of the hard disk to write with
  1234. usage of obsolete syntax /HD and obsolete function 58;
  1235. at usage of functions 58 and 70 and modern syntax /HD0,/HD1,/HD2,/HD3
  1236. base and partition are set automatically.
  1237. Parameters:
  1238.   * eax = 21 - function number
  1239.   * ebx = 8 - subfunction number
  1240.   * ecx = HD partition (beginning from 1)
  1241. Return value:
  1242.   * eax = 0
  1243. Remarks:
  1244.   * Any application at any time can change partition.
  1245.   * Do not change partition when any application works with hard disk.
  1246.     If you do not want system bugs.
  1247.   * To get used partition use subfunction 8 of function 26.
  1248.   * There is no correctness checks.
  1249.   * To get the number of partitions of a hard disk use
  1250.     subfunction 11 of function 18.
  1251.   * It is also necessary to define used HD base by subfunction 7.
  1252.  
  1253. ======================================================================
  1254.  Function 21, subfunction 11 - enable/disable low-level access to HD.
  1255. ======================================================================
  1256. Parameters:
  1257.   * eax = 21 - function number
  1258.   * ebx = 11 - subfunction number
  1259.   * ecx = 0/1 - disable/enable
  1260. Returned value:
  1261.   * eax = 0
  1262. Remarks:
  1263.   * Is used in LBA-read (subfunction 8 of function 58).
  1264.   * The current implementation uses only low bit of ecx.
  1265.   * To get current status use subfunction 11 of function 26.
  1266.  
  1267. ======================================================================
  1268.  Function 21, subfunction 12 - enable/disable low-level access to PCI.
  1269. ======================================================================
  1270. Parameters:
  1271.   * eax = 21 - function number
  1272.   * ebx = 12 - subfunction number
  1273.   * ecx = 0/1 - disable/enable
  1274. Returned value:
  1275.   * eax = 0
  1276. Remarks:
  1277.   * Is used in operations with PCI bus (function 62).
  1278.   * The current implementation uses only low bit of ecx.
  1279.   * To get current status use subfunction 12 of function 26.
  1280.  
  1281. ======================================================================
  1282. ============ Function 21, subfunction 13, subsubfunction 1 ===========
  1283. ======== Initialize + get information on the driver vmode.mdr. =======
  1284. ======================================================================
  1285. Parameters:
  1286.   * eax = 21 - function number
  1287.   * ebx = 13 - subfunction number
  1288.   * ecx = 1 - number of the driver function
  1289.   * edx = pointer to 512-bytes buffer
  1290. Returned value:
  1291.   * if driver is not loaded
  1292.     (never happens in the current implementation):
  1293.     * eax = -1
  1294.     * ebx, ecx destroyed
  1295.   * if driver is loaded:
  1296.     * eax = 'MDAZ' (in fasm style, that is 'M' - low byte, 'Z' - high)
  1297.       - signature
  1298.     * ebx = current frequency of the scanning (in Hz)
  1299.     * ecx destroyed
  1300.     * buffer pointed to by edx is filled
  1301. Format of the buffer:
  1302.   * +0: 32*byte: driver name, "Trans VideoDriver"
  1303.     (without quotes, supplemented by spaces)
  1304.   * +32 = +0x20: dword: driver version (version x.y is encoded as
  1305.     y*65536+x), for the current implementation is 1 (1.0)
  1306.   * +36 = +0x24: 7*dword: reserved (0 in the current implementation)
  1307.   * +64 = +0x40: 32*word: list of supported videomodes (each word
  1308.     is number of a videomode, after list itself there are zeroes)
  1309.   * +128 = +0x80: 32*(5*word): list of supported frequences of the
  1310.     scannings for videomodes: for each videomode listed in the
  1311.     previous field up to 5 supported frequences are given
  1312.     (unused positions contain zeroes)
  1313. Remarks:
  1314.   * Function initializes the driver (if it is not initialized yet)
  1315.     and must be called first, before others (otherwise they will do
  1316.     nothing and return -1).
  1317.   * The current implementation supports only one frequency
  1318.     of the scanning on videomode.
  1319.  
  1320. ======================================================================
  1321. ============ Function 21, subfunction 13, subsubfunction 2 ===========
  1322. ================ Get information on current videomode. ===============
  1323. ======================================================================
  1324. Parameters:
  1325.   * eax = 21 - function number
  1326.   * ebx = 13 - subfunction number
  1327.   * ecx = 2 - number of the driver function
  1328. Returned value:
  1329.   * eax = -1 - driver is not loaded or not initialized;
  1330.     ebx,ecx are destroyed
  1331.   * eax = [width]*65536 + [height]
  1332.   * ebx = frequency of the vertical scanning (in Hz)
  1333.   * ecx = number of current videomode
  1334. Remarks:
  1335.   * Driver must be initialized by call to
  1336.     driver function 1.
  1337.   * If only screen sizes are required, it is more expedient to use
  1338.     function 14 taking into account that it
  1339.     returns sizes on 1 less.
  1340.  
  1341. ======================================================================
  1342. === Function 21, subfunction 13, subsubfunction 3 - set videomode. ===
  1343. ======================================================================
  1344. Parameters:
  1345.   * eax = 21 - function number
  1346.   * ebx = 13 - subfunction number
  1347.   * ecx = 3 - number of the driver function
  1348.   * edx = [scanning frequency]*65536 + [videomode number]
  1349. Returned value:
  1350.   * eax = -1 - driver is not loaded, not initialized or
  1351.     an error has occured
  1352.   * eax = 0 - success
  1353.   * ebx, ecx destroyed
  1354. Remarks:
  1355.   * Driver must be initialized by driver function 1.
  1356.   * The videomode number and frequency must be in the table
  1357.     returned by driver function 1.
  1358.  
  1359. ======================================================================
  1360. ============ Function 21, subfunction 13, subsubfunction 4 ===========
  1361. ================== Return to the initial videomode. ==================
  1362. ======================================================================
  1363. Returns the screen to the videomode set at system boot.
  1364. Parameters:
  1365.   * eax = 21 - function number
  1366.   * ebx = 13 - subfunction number
  1367.   * ecx = 4 - number of the driver function
  1368. Returned value:
  1369.   * eax = -1 - driver is not loaded or not initialized
  1370.   * eax = 0 - success
  1371.   * ebx, ecx destroyed
  1372. Remarks:
  1373.   * Driver must be initialized by call to driver function 1.
  1374.  
  1375. ======================================================================
  1376. ============ Function 21, subfunction 13, subsubfunction 5 ===========
  1377. ===== Increase/decrease the size of the visible area of monitor. =====
  1378. ======================================================================
  1379. Parameters:
  1380.   * eax = 21 - function number
  1381.   * ebx = 13 - subfunction number
  1382.   * ecx = 5 - number of the driver function
  1383.   * edx = 0/1 - decrease/increase horizontal size on 1 position
  1384.   * edx = 2/3 - is not supported in the current implementation;
  1385.     is planned as decrease/increase vertical size on 1 position
  1386. Returned value:
  1387.   * eax = -1 - driver is not loaded or not initialized
  1388.   * eax = 0 - success
  1389.   * ebx, ecx destroyed
  1390. Remarks:
  1391.   * Driver must be initialized by call to driver function 1.
  1392.   * Function influences only the physical size of the screen image;
  1393.     the logical size (number of pixels) does not change.
  1394.  
  1395. ======================================================================
  1396. ================= Function 22 - set system date/time. ================
  1397. ======================================================================
  1398. Parameters:
  1399.   * eax = 22 - function number
  1400.   * ebx = 0 - set time
  1401.     * ecx = 0x00SSMMHH - time in the binary-decimal code (BCD):
  1402.     * HH=hour 00..23
  1403.     * MM=minute 00..59
  1404.     * SS=second 00..59
  1405.   * ebx = 1 - set date
  1406.     * ecx = 0x00DDMMYY - date in the binary-decimal code (BCD):
  1407.     * DD=day 01..31
  1408.     * MM=month 01..12
  1409.     * YY=year 00..99
  1410.   * ebx = 2 - set day of week
  1411.     * ecx = 1 for Sunday, ..., 7 for Saturday
  1412.   * ebx = 3 - set alarm clock
  1413.     * ecx = 0x00SSMMHH
  1414. Returned value:
  1415.   * eax = 0 - success
  1416.   * eax = 1 - incorrect parameter
  1417.   * eax = 2 - CMOS-battery was unloaded
  1418. Remarks:
  1419.   * Value of installation of day of week seems to be doubtful,
  1420.     as it a little where is used
  1421.     (day of week can be calculated by date).
  1422.   * Alarm clock can be set on operation in the given time every day.
  1423.     But there is no existing system function to disable it.
  1424.   * Operation of alarm clock consists in generation IRQ8.
  1425.   * Generally CMOS supports for alarm clock set of value 0xFF
  1426.     as one of parameters and it means that the appropriate parameter
  1427.     is ignored. But current implementation does not allow this
  1428.     (will return 1).
  1429.   * Alarm clock is a global system resource; the set of
  1430.     an alarm clock cancels automatically the previous set.
  1431.     However, at moment no program uses it.
  1432.  
  1433. ======================================================================
  1434. ============= Function 23 - wait for event with timeout. =============
  1435. ======================================================================
  1436. If the message queue is empty, waits for new message in the queue,
  1437. but no more than given time. Then reads out a message from the queue.
  1438.  
  1439. Parameters:
  1440.   * eax = 23 - function number
  1441.   * ebx = timeout (in 1/100 of second)
  1442. Returned value:
  1443.   * eax = 0 - the message queue is empty
  1444.   * otherwise eax = event (see the list of events)
  1445. Remarks:
  1446.   * Only those events are taken into account, which enter into
  1447.     the mask set by function 40. By default it is
  1448.     redraw, key and button events.
  1449.   * To check for presence of a message in the queue use function 11.
  1450.     To wait without timeout use function 10.
  1451.   * Transmission ebx=0 results in immediate returning eax=0.
  1452.   * Current implementation returns immediately with eax=0,
  1453.     if the addition of ebx with the current value of time counter
  1454.     makes 32-bit overflow.
  1455.  
  1456. ======================================================================
  1457. ======== Function 24, subfunction 1 - begin to play CD-audio. ========
  1458. ======================================================================
  1459. Parameters:
  1460.   * eax = 24 - function number
  1461.   * ebx = 1 - subfunction number
  1462.   * ecx = 0x00FRSSMM, where
  1463.     * MM = starting minute
  1464.     * SS = starting second
  1465.     * FR = starting frame
  1466. Returned value:
  1467.   * eax = 0 - success
  1468.   * eax = 1 - CD base is not defined
  1469. Remarks:
  1470.   * Previously CD base must be defined by the call to
  1471.     subfunction 3 of function 21.
  1472.   * One second includes 75 frames, one minute includes 60 seconds.
  1473.   * The function is asynchronous (returns control, when play begins).
  1474.  
  1475. ======================================================================
  1476. ======= Function 24, subfunction 2 - get information on tracks. ======
  1477. ======================================================================
  1478. Parameters:
  1479.   * eax = 24 - function number
  1480.   * ebx = 2 - subfunction number
  1481.   * ecx = pointer to the buffer for the table
  1482.     (maximum 8*64h+4 bytes=100 tracks)
  1483. Returned value:
  1484.   * eax = 0 - success
  1485.   * eax = 1 - CD base is not defined
  1486. Remarks:
  1487.   * The format of the table with tracks information is the same as
  1488.     for ATAPI-CD command 43h (READ TOC), usual table (subcommand 00h).
  1489.     Function returns addresses in MSF.
  1490.   * Previously CD base port must be set by call to
  1491.     subfunction 3 of function 21.
  1492.   * Function returns information only about no more than 100
  1493.     first tracks. In most cases it is enough.
  1494.  
  1495. ======================================================================
  1496. ========== Function 24, subfunction 3 - stop play CD-audio. ==========
  1497. ======================================================================
  1498. Parameters:
  1499.   * eax = 24 - function number
  1500.   * ebx = 1 - subfunction number
  1501. Returned value:
  1502.   * eax = 0 - success
  1503.   * eax = 1 - CD base is not defined
  1504. Remarks:
  1505.   * Previously CD base port must be defined by call to
  1506.     subfunction 3 of function 21.
  1507.  
  1508. ======================================================================
  1509. ======= Function 24, subfunction 4 - eject tray of disk drive. =======
  1510. ======================================================================
  1511. Parameters:
  1512.   * eax = 24 - function number
  1513.   * ebx = 4 - subfunction number
  1514.   * ecx = position of CD/DVD-drive
  1515.       (from 0=Primary Master to 3=Secondary Slave)
  1516. Returned value:
  1517.   * function does not return value
  1518. Remarks:
  1519.   * The function is supported only for ATAPI devices (CD and DVD).
  1520.   * When the tray is being ejected,
  1521.     manual control of tray is unlocked.
  1522.   * When the tray is being ejected, the code clears the cache for
  1523.     corresponding device.
  1524.   * An example of usage of the function is the application CD_tray.
  1525.  
  1526. ======================================================================
  1527. ======== Function 24, subfunction 5 - load tray of disk drive. =======
  1528. ======================================================================
  1529. Parameters:
  1530.   * eax = 24 - function number
  1531.   * ebx = 5 - subfunction number
  1532.   * ecx = position of CD/DVD-drive
  1533.       (from 0=Primary Master to 3=Secondary Slave)
  1534. Returned value:
  1535.   * function does not return value
  1536. Remarks:
  1537.   * The function is supported only for ATAPI devices (CD and DVD).
  1538.   * An example of usage of the function is the application CD_tray.
  1539.  
  1540. ======================================================================
  1541. ======= Function 25 - put image area on the background layer. ========
  1542. ======================================================================
  1543. Paramters:
  1544.   * eax = 25 - function number
  1545.   * ebx = pointer to the previously allocated memory area,
  1546.         where placed the source images in a format BBGGRRTTBBGGRRTT...
  1547.   * ecx = [size on axis x]*65536 + [size on axis y]
  1548.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  1549. Returned value:
  1550.   * function does not return value
  1551. Remarks:
  1552.   * Coordinates of the image are coordinates of the upper left corner
  1553.     of the image relative to the screen.
  1554.   * Size of the image in bytes is 4*xsize*ysize
  1555.   * TT - byte pointer of transparency, at current version:
  1556.          1 to FF - opaque, 0 - transparent.
  1557.   * The function places the image directly to LFB. It is not for
  1558.     background image f.15. Options f.15 to f.25 does not make sense.
  1559.  
  1560. ======================================================================
  1561. ======== Function 26, subfunction 1 - get MPU MIDI base port. ========
  1562. ======================================================================
  1563. Parameters:
  1564.   * eax = 26 - function number
  1565.   * ebx = 1 - subfunction number
  1566. Returned value:
  1567.   * eax = port number
  1568. Parameters:
  1569.   * To set base port use subfunction 1 of function 21.
  1570.  
  1571. ======================================================================
  1572. ========== Function 26, subfunction 2 - get keyboard layout. =========
  1573. ======================================================================
  1574. The keyboard layout is used to convert keyboard scancodes to
  1575. ASCII-codes for function 2.
  1576. Parameters:
  1577.   * eax = 26 - function number
  1578.   * ebx = 2 - subfunction number
  1579.   * ecx = what layout to get:
  1580.     * 1 = normal layout
  1581.     * 2 = layout with pressed Shift
  1582.     * 3 = layout with pressed Alt
  1583.   * edx = pointer to the 128-bytes buffer, where the layout will be
  1584.     copied
  1585. Returned value:
  1586.   * function does not return value
  1587. Or:
  1588.   * eax = 26 - function number
  1589.   * ebx = 2 - subfunction number
  1590.   * ecx = 9
  1591. Returned value:
  1592.   * eax = country identifier (1=eng, 2=fi, 3=ger, 4=rus)
  1593. Remarks:
  1594.   * If Alt is pressed, the layout with Alt is used;
  1595.     if Alt is not pressed, but Shift is pressed,
  1596.     the layout with Shift is used;
  1597.     if Alt and Shift are not pressed, but Ctrl is pressed, the normal
  1598.     layout is used and then from the code is subtracted 0x60;
  1599.     if no control key is pressed, the normal layout is used.
  1600.   * To set layout and country identifier use
  1601.     subfunction 2 of function 21.
  1602.   * Country identifier is global system variable, which is not used
  1603.     by the kernel itself; however the application '@panel' displays
  1604.     the corresponding icon (using this function).
  1605.   * The application @panel switches layouts on user request.
  1606.  
  1607. ======================================================================
  1608. ============== Function 26, subfunction 3 - get CD base. =============
  1609. ======================================================================
  1610. Parameters:
  1611.   * eax = 26 - function number
  1612.   * ebx = 3 - subfunction number
  1613. Returned value:
  1614.   * eax = CD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1615. Remarks:
  1616.   * CD base is used by function 24.
  1617.   * To set CD base use subfunction 3 of function 21.
  1618.  
  1619. ======================================================================
  1620. ========== Function 26, subfunction 5 - get system language. =========
  1621. ======================================================================
  1622. Parameters:
  1623.   * eax = 26 - function number
  1624.   * ebx = 5 - subfunction number
  1625. Returned value:
  1626.   * eax = system language (1=eng, 2=fi, 3=ger, 4=rus)
  1627. Remarks:
  1628.   * System language is global system variable and is not used
  1629.     by the kernel itself, however application @panel draws the
  1630.     appropriate icon (using this function).
  1631.   * To set system language use subfunction 5 of function 21.
  1632.  
  1633. ======================================================================
  1634. ============== Function 26, subfunction 7 - get HD base. =============
  1635. ======================================================================
  1636. The HD base defines hard disk to write with usage of obsolete
  1637. syntax /HD in obsolete function 58; at usage of modern syntax
  1638. /HD0,/HD1,/HD2,/HD3 base is set automatically.
  1639. Parameters:
  1640.   * eax = 26 - function number
  1641.   * ebx = 7 - subfunction number
  1642. Returned value:
  1643.   * eax = HD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1644. Remarks:
  1645.   * Any application in any time can change HD base.
  1646.   * To set base use subfunction 7 of function 21.
  1647.   * To get used partition of hard disk use subfunction 8.
  1648.  
  1649. ======================================================================
  1650. ========= Function 26, subfunction 8 - get used HD partition. ========
  1651. ======================================================================
  1652. The HD partition defines partition of the hard disk to write with
  1653. usage of obsolete syntax /HD in obsolete function 58;
  1654. at usage of functions 58 and 70 and modern syntax /HD0,/HD1,/HD2,/HD3
  1655. base and partition are set automatically.
  1656. Parameters:
  1657.   * eax = 26 - function number
  1658.   * ebx = 8 - subfunction number
  1659. Returned value:
  1660.   * eax = HD partition (beginning from 1)
  1661. Remarks:
  1662.   * Any application in any time can change partition.
  1663.   * To set partition use subfunction 8 of function 21.
  1664.   * To get number of partitions on a hard disk use
  1665.     subfunction 11 of function 18.
  1666.   * To get base of used hard disk, use subfunction 7.
  1667.  
  1668. ======================================================================
  1669. === Function 26, subfunction 9 - get the value of the time counter. ==
  1670. ======================================================================
  1671. Parameters:
  1672.   * eax = 26 - function number
  1673.   * ebx = 9 - subfunction number
  1674. Returned value:
  1675.   * eax = number of 1/100s of second, past from the system boot time
  1676. Remarks:
  1677.   * Counter takes modulo 2^32, that correspond to a little more
  1678.     than 497 days.
  1679.   * To get system time use function 3.
  1680.  
  1681. ======================================================================
  1682. ===================== Function 26, subfunction 11 ====================
  1683. ========== Find out whether low-level HD access is enabled. ==========
  1684. ======================================================================
  1685. Parameters:
  1686.   * eax = 26 - function number
  1687.   * ebx = 11 - subfunction number
  1688. Returned value:
  1689.   * eax = 0/1 - disabled/enabled
  1690. Remarks:
  1691.   * Is used in LBA read (subfunction 8 of function 58).
  1692.   * To set current state use subfunction 11 of function 21.
  1693.  
  1694. ======================================================================
  1695. ===================== Function 26, subfunction 12 ====================
  1696. ========== Find out whether low-level PCI access is enabled. =========
  1697. ======================================================================
  1698. Parameters:
  1699.   * eax = 26 - function number
  1700.   * ebx = 12 - subfunction number
  1701. Returned value:
  1702.   * eax = 0/1 - disabled/enabled
  1703. Remarks:
  1704.   * Is used by operations with PCI bus (function 62).
  1705.   * The current implementation uses only low bit of ecx.
  1706.   * To set the current state use subfunction 12 of function 21.
  1707.  
  1708. ======================================================================
  1709. =================== Function 29 - get system date. ===================
  1710. ======================================================================
  1711. Parameters:
  1712.   * eax = 29 - function number
  1713. Returned value:
  1714.   * eax = 0x00DDMMYY, where
  1715.     (binary-decimal coding, BCD, is used)
  1716.   * YY = two low digits of year (00..99)
  1717.   * MM = month (01..12)
  1718.   * DD = day (01..31)
  1719. Remarks:
  1720.   * To set system date use function 22.
  1721.  
  1722. ======================================================================
  1723. ============= Function 30 - work with the current folder. ============
  1724. ======================================================================
  1725.  
  1726. --------- Subfunction 1 - set current folder for the thread. ---------
  1727. Parameters:
  1728.   * eax = 30 - function number
  1729.   * ebx = 1 - subfunction number
  1730.   * ecx = pointer to ASCIIZ-string with the path to new current folder
  1731. Returned value:
  1732.   * function does not return value
  1733.  
  1734. --------- Subfunction 2 - get current folder for the thread. ---------
  1735. Parameters:
  1736.   * eax = 30 - function number
  1737.   * ebx = 2 - subfunction number
  1738.   * ecx = pointer to buffer
  1739.   * edx = size of buffer
  1740. Returned value:
  1741.   * eax = size of the current folder's name (including terminating 0)
  1742. Remarks:
  1743.   * If the buffer is too small to hold all data, only first (edx-1)
  1744.     bytes are copied and than terminating 0 is inserted.
  1745.   * By default, current folder for the thread is "/rd/1".
  1746.   * At process/thread creation the current folder will be inherited
  1747.     from the parent.
  1748.  
  1749. ======================================================================
  1750. ========= Function 34 - who owner the pixel on the screen. ===========
  1751. ======================================================================
  1752. Parameters:
  1753.   * eax = 34 - function number
  1754.   * ebx = x-coordinate (relative to the display)
  1755.   * ecx = y-coordinate (relative to the display)
  1756.  
  1757. Returned value:
  1758.   * eax = 0x000000XX - owner of pixel the slot window N
  1759.     If incorrect values ebx and ecx then function returns 0
  1760.   * The function takes the value from the area [_WinMapAddress]
  1761.  
  1762. ======================================================================
  1763. ======= Function 35 - read the color of a pixel on the screen. =======
  1764. ======================================================================
  1765. Parameters:
  1766.   * eax = 35
  1767.   * ebx = y*xsize+x, where
  1768.   * (x,y) = coordinates of a pixel (beginning from 0)
  1769.   * xsize = horizontal screen size
  1770. Returned value:
  1771.   * eax = color 0x00RRGGBB
  1772. Remarks:
  1773.   * To get screen sizes use function 14. Pay attention,
  1774.     that it subtracts 1 from both sizes.
  1775.   * There is also direct access (without any system calls)
  1776.     to videomemory through the selector gs. To get parameters of
  1777.     the current videomode, use function 61.
  1778.  
  1779. ======================================================================
  1780. =================== Function 36 - read screen area. ==================
  1781. ======================================================================
  1782. Paramters:
  1783.   * eax = 36 - function number
  1784.   * ebx = pointer to the previously allocated memory area,
  1785.         where will be placed the image in the format BBGGRRBBGGRR...
  1786.   * ecx = [size on axis x]*65536 + [size on axis y]
  1787.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  1788. Returned value:
  1789.   * function does not return value
  1790. Remarks:
  1791.   * Coordinates of the image are coordinates of the upper left corner
  1792.     of the image relative to the screen.
  1793.   * Size of the image in bytes is 3*xsize*ysize.
  1794.  
  1795. ======================================================================
  1796. =================== Function 37 - work with mouse. ===================
  1797. ======================================================================
  1798.  
  1799. ---------- Subfunction 0 - screen coordinates of the mouse -----------
  1800. Parameters:
  1801.   * eax = 37 - function number
  1802.   * ebx = 0 - subfunction number
  1803. Returned value:
  1804.   * eax = x*65536 + y, (x,y)=coordinates of the mouse pointer
  1805.     (beginning from 0)
  1806.  
  1807. -- Subfunction 1 - coordinates of the mouse relative to the window ---
  1808. Parameters:
  1809.   * eax = 37 - function number
  1810.   * ebx = 1 - subfunction number
  1811. Returned value:
  1812.   * eax = x*65536 + y, (x,y)=coordinates of the mouse pointer
  1813.     relative to the application window (beginning from 0)
  1814. Remarks:
  1815.   * The value is calculated by formula (x-xwnd)*65536 + (y-ywnd).
  1816.     If y>=ywnd, the low word is non-negative and contains
  1817.     relative y-coordinate, and the high word - relative x-coordinate
  1818.     (with correct sign). Otherwise the low word is negative and still
  1819.     contains relative y-coordinate, and to the high word
  1820.     1 should be added.
  1821.  
  1822. ------------ Subfunction 2 - pressed buttons of the mouse ------------
  1823. Parameters:
  1824.   * eax = 37 - function number
  1825.   * ebx = 2 - subfunction number
  1826. Returned value:
  1827.   * eax contains information on the pressed mouse buttons:
  1828.   * bit 0 is set = left button is pressed
  1829.   * bit 1 is set = right button is pressed
  1830.   * bit 2 is set = middle button is pressed
  1831.   * bit 3 is set = 4th button is pressed
  1832.   * bit 4 is set = 5th button is pressed
  1833.   * other bits are cleared
  1834.  
  1835. -------------------- Subfunction 4 - load cursor ---------------------
  1836. Parameters:
  1837.   * eax = 37 - function number
  1838.   * ebx = 4 - subfunction number
  1839.   * dx = data source:
  1840.   * dx = LOAD_FROM_FILE = 0 - data in a file
  1841.     * ecx = pointer to full path to the cursor file
  1842.     * the file must be in the format .cur, which is standard for
  1843.       MS Windows, at that of the size 32*32 pixels
  1844.   * dx = LOAD_FROM_MEM = 1 - data of file are already loaded in memory
  1845.     * ecx = pointer to data of the cursor file
  1846.     * the data format is the same as in the previous case
  1847.   * dx = LOAD_INDIRECT = 2 - data in memory
  1848.     * ecx = pointer to cursor image in the format ARGB 32*32 pixels
  1849.     * edx = 0xXXYY0002, where
  1850.       * XX = x-coordinate of cursor hotspot
  1851.       * YY = y-coordinate
  1852.       * 0 <= XX, YY <= 31
  1853. Returned value:
  1854.   * eax = 0 - failed
  1855.   * otherwise eax = cursor handle
  1856.  
  1857. --------------------- Subfunction 5 - set cursor ---------------------
  1858. Sets new cursor for the window of the current thread.
  1859. Parameters:
  1860.   * eax = 37 - function number
  1861.   * ebx = 5 - subfunction number
  1862.   * ecx = cursor handle
  1863. Returned value:
  1864.   * eax = handle of previous cursor
  1865. Remarks:
  1866.   * If the handle is incorrect, the function restores the default
  1867.     cursor (standard arrow). In particular, ecx=0 restores it.
  1868.  
  1869. ------------------- Subfunction 6 - delete cursor --------------------
  1870. Parameters:
  1871.   * eax = 37 - function number
  1872.   * ebx = 6 - subfunction number
  1873.   * ecx = cursor handle
  1874. Returned value:
  1875.   * eax destroyed
  1876. Remarks:
  1877.   * The cursor must be loaded previously by the current thread
  1878.     (with the call to subfunction 4). The function does not delete
  1879.     system cursors and cursors, loaded by another applications.
  1880.   * If the active cursor (set by subfunction 5) is deleted,
  1881.     the system restores the default cursor (standard arrow).
  1882.  
  1883. ------------------ Subfunction 7 - get scroll data -------------------
  1884. Parameters:
  1885.   * eax = 37 - function number
  1886.   * ebx = 7 - subfunction number
  1887. Returned value:
  1888.   * eax = [horizontal offset]*65536 + [vertical offset]
  1889. Remarks:
  1890.   * Scroll data is available for active window only.
  1891.   * Values are zeroed after reading.
  1892.   * Values are signed.
  1893.  
  1894. ======================================================================
  1895. ====================== Function 38 - draw line. ======================
  1896. ======================================================================
  1897. Parameters:
  1898.   * eax = 38 - function number
  1899.   * ebx = [start coordinate on axis x]*65536 +
  1900.               [end coordinate on axis x]
  1901.   * ecx = [start coordinate on axis y]*65536 +
  1902.               [end coordinate on axis y]
  1903.   * edx = 0x00RRGGBB - color
  1904.     edx = 0x01xxxxxx - draw inversed line
  1905.           (low 24 bits are ignored)
  1906. Returned value:
  1907.   * function does not return value
  1908. Remarks:
  1909.   * Coordinates are relative to the window.
  1910.   * End point is also drawn.
  1911.  
  1912. ======================================================================
  1913. == Function 39, subfunction 1 - get a size of the background image. ==
  1914. ======================================================================
  1915. Parameters:
  1916.   * eax = 39 - function number
  1917.   * ebx = 1 - subfunction number
  1918. Returned value:
  1919.   * eax = [width]*65536 + [height]
  1920. Remarks:
  1921.   * There is a pair function to set sizes of background image -
  1922.     subfunction 1 of function 15. After which it is necessary,
  1923.     of course, anew to define image.
  1924.  
  1925. ======================================================================
  1926. == Function 39, subfunction 2 - get pixel from the background image. =
  1927. ======================================================================
  1928. Parameters:
  1929.   * eax = 39 - function number
  1930.   * ebx = 2 - subfunction number
  1931.   * ecx = offset
  1932. Returned value:
  1933.   * eax = 0x00RRGGBB - pixel color, if offset is valid
  1934.     (less than 0x160000-16)
  1935.   * eax = 2 otherwise
  1936. Remarks:
  1937.   * Do not rely on returned value for invalid offsets, it may be
  1938.     changed in future kernel versions.
  1939.   * Offset for pixel with coordinates (x,y)
  1940.     is calculated as (x+y*xsize)*3.
  1941.   * There is a pair function to set pixel on the background image -
  1942.     subfunction 2 of function 15.
  1943.  
  1944. ======================================================================
  1945. == Function 39, subfunction 4 - get drawing mode for the background. =
  1946. ======================================================================
  1947. Parameters:
  1948.   * eax = 39 - function number
  1949.   * ebx = 4 - subfunction number
  1950. Returned value:
  1951.   * eax = 1 - tile
  1952.   * eax = 2 - stretch
  1953. Remarks:
  1954.   * There is a pair function to set drawing mode -
  1955.     subfunction 4 of function 15.
  1956.  
  1957. ======================================================================
  1958. =========== Function 40 - set the mask for expected events. ==========
  1959. ======================================================================
  1960. The mask for expected events affects function working with events
  1961. 10, 11, 23 - they notify only about events allowed by this mask.
  1962. Parameters:
  1963.   * eax = 40 - function number
  1964.   * ebx = mask: bit i corresponds to event i+1 (see list of events)
  1965.     (set bit permits notice on event)
  1966.     bit 31: active/inactive filter
  1967.     bit 31 = 0 - inactive window receive mouse events
  1968.     bit 31 = 1 - inactive window does not receive mouse events
  1969.     bit 30: cursor position filter
  1970.     bit 30 = 0 = the window receive mouse events if cursor
  1971.                  outside window
  1972.     bit 30 = 1 - the window does not receive mouse events if cursor
  1973.                  outside window
  1974. Returned value:
  1975.   * eax = previous value of mask
  1976. Remarks:
  1977.   * Default mask (7=111b) enables nofices about redraw,
  1978.     keys and buttons. This is enough for many applications.
  1979.   * Events prohibited in the mask are saved anyway, when come;
  1980.     they are simply not informed with event functions.
  1981.   * Event functions take into account the mask on moment of
  1982.     function call, not on moment of event arrival.
  1983.  
  1984.  
  1985. ======================================================================
  1986. ================ Function 43 - input/output to a port. ===============
  1987. ======================================================================
  1988.  
  1989. ------------------------ Output data to port -------------------------
  1990. Parameters:
  1991.   * eax = 43 - function number
  1992.   * bl = byte for output
  1993.   * ecx = port number 0xnnnn (from 0 to 0xFFFF)
  1994. Returned value:
  1995.   * eax = 0 - success
  1996.   * eax = 1 - the thread has not reserved the selected port
  1997.  
  1998. ------------------------ Input data from port ------------------------
  1999. Parameters:
  2000.   * eax = 43 - function number
  2001.   * ebx is ignored
  2002.   * ecx = 0x8000nnnn, where nnnn = port number (from 0 to 0xFFFF)
  2003. Returned value:
  2004.   * eax = 0 - success, thus ebx = entered byte
  2005.   * eax = 1 - the thread has not reserved the selected port
  2006. Remarks:
  2007.   * Previously the thread must reserve the selected port
  2008.     for itself by function 46.
  2009.   * Instead of call to this function it is better to use
  2010.     processor instructions in/out - this is much
  2011.     faster and a bit shorter and easier.
  2012.  
  2013.  
  2014. ======================================================================
  2015. ====== Function 46 - reserve/free a group of input/output ports. =====
  2016. ======================================================================
  2017. To work with reserved ports an application can access directly by
  2018. commands in/out (recommended way) and can use function 43
  2019. (not recommended way).
  2020. Parameters:
  2021.   * eax = 46 - function number
  2022.   * ebx = 0 - reserve, 1 - free
  2023.   * ecx = start port number
  2024.   * edx = end port number (inclusive)
  2025. Returned value:
  2026.   * eax = 0 - success
  2027.   * eax = 1 - error
  2028. Remarks:
  2029.   * For ports reservation: an error occurs if and only if
  2030.     one from the following condition satisfies:
  2031.     * start port is more than end port;
  2032.     * the selected range contains incorrect port number
  2033.       (correct are from 0 to 0xFFFF);
  2034.     * limit for the total number of reserved areas is exceeded
  2035.       (maximum 255 are allowed);
  2036.     * the selected range intersects with any of earlier reserved
  2037.   * For ports free: an error is an attempt to free range,
  2038.     that was not earlier reserved by this function
  2039.     (with same ecx,edx).
  2040.   * If an error occurs (for both cases) function performs no action.
  2041.   * At booting the system reserves for itself ports
  2042.     0..0x2d, 0x30..0x4d, 0x50..0xdf, 0xe5..0xff (inclusively).
  2043.   * When a thread terminates, all reserved by it ports
  2044.     are freed automatically.
  2045.  
  2046. ======================================================================
  2047. ============= Function 47 - draw a number in the window. =============
  2048. ======================================================================
  2049. Parameters:
  2050.   * eax = 47 - function number
  2051.   * ebx = parameters of conversion number to text:
  2052.     * bl = 0 - ecx contains number
  2053.     * bl = 1 - ecx contains pointer to dword/qword-number
  2054.     * bh = 0 - display in decimal number system
  2055.     * bh = 1 - display in hexadecimal system
  2056.     * bh = 2 - display in binary system
  2057.     * bits 16-21 = how many digits to display
  2058.     * bits 22-29 reserved and must be set to 0
  2059.     * bit 30 set = display qword (64-bit) number (must be bl=1)
  2060.     * bit 31 set = do not display leading zeroes of the number
  2061.   * ecx = number (if bl=0) or pointer (if bl=1)
  2062.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  2063.   * esi = 0xX0RRGGBB:
  2064.     * RR, GG, BB specify the color
  2065.     * X = ABnn (bits)
  2066.     * nn = font (0/1)
  2067.     * A is ignored
  2068.     * B=1 - fill background with the color edi
  2069. Returned value:
  2070.   * function does not return value
  2071. Remarks:
  2072.   * The given length must not exceed 60.
  2073.   * The exactly given amount of digits is output. If number is small
  2074.     and can be written by smaller amount of digits, it is supplemented
  2075.     by leading zeroes; if the number is big and can not be written by
  2076.     given amount of digits, extra digits are not drawn.
  2077.   * Parameters of fonts are shown in the description of function 4
  2078.     (text output).
  2079.  
  2080. ======================================================================
  2081. ========= Function 48, subfunction 0 - apply screen settings. ========
  2082. ======================================================================
  2083. Parameters:
  2084.   * eax = 48 - function number
  2085.   * ebx = 0 - subfunction number
  2086.   * ecx = 0 - reserved
  2087. Returned value:
  2088.   * function does not return value
  2089. Remarks:
  2090.   * Function redraws the screen after parameters change by
  2091.     subfunctions 1 and 2.
  2092.   * Function call without prior call to one of indicated subfunctions
  2093.     is ignored.
  2094.   * Function call with nonzero ecx is ignored.
  2095.  
  2096. ======================================================================
  2097. =========== Function 48, subfunction 1 - set button style. ===========
  2098. ======================================================================
  2099. Parameters:
  2100.   * eax = 48 - function number
  2101.   * ebx = 1 - subfunction number
  2102.   * ecx = button style:
  2103.     * 0 = flat
  2104.     * 1 = 3d
  2105. Returned value:
  2106.   * function does not return value
  2107. Remarks:
  2108.   * After call to this function one should redraw the screen by
  2109.     subfunction 0.
  2110.   * Button style influences only to their draw of function 8.
  2111.  
  2112. ======================================================================
  2113. ====== Function 48, subfunction 2 - set standard window colors. ======
  2114. ======================================================================
  2115. Parameters:
  2116.   * eax = 48 - function number
  2117.   * ebx = 2 - subfunction number
  2118.   * ecx = pointer to the color table
  2119.   * edx = size of the color table
  2120.     (must be 40 bytes for future compatibility)
  2121. Format of the color table is shown in description of subfunction 3.
  2122. Returned value:
  2123.   * function does not return value
  2124. Remarks:
  2125.   * After call to this function one should redraw the screen by
  2126.     subfunction 0.
  2127.   * Table of standard colors influences only to applications,
  2128.     which receive this table obviously (by subfunction 3)
  2129.     and use it (specifying colors from it to drawing functions).
  2130.   * Table of standard colors is included in skin and is installed
  2131.     anew with skin installation (by subfunction 8).
  2132.   * Color table can be viewed/changed interactively with
  2133.     the application 'desktop'.
  2134.  
  2135. ======================================================================
  2136. ====== Function 48, subfunction 3 - get standard window colors. ======
  2137. ======================================================================
  2138. Parameters:
  2139.   * eax = 48 - function number
  2140.   * ebx = 3 - subfunction number
  2141.   * ecx = pointer to the buffer with size edx bytes,
  2142.     where table will be written
  2143.   * edx = size of color table
  2144.     (must be 40 bytes for future compatibility)
  2145. Returned value:
  2146.   * function does not return value
  2147. Format of the color table:
  2148. each item is dword-value for color 0x00RRGGBB
  2149.   * +0: dword: frames - color of frame
  2150.   * +4: dword: grab - color of header
  2151.   * +8: dword: grab_button - color of button on header bar
  2152.   * +12 = +0xC: dword: grab_button_text - color of text on button
  2153.     on header bar
  2154.   * +16 = +0x10: dword: grab_text - color of text on header
  2155.   * +20 = +0x14: dword: work - color of working area
  2156.   * +24 = +0x18: dword: work_button - color of button in working area
  2157.   * +28 = +0x1C: dword: work_button_text - color of text on button
  2158.     in working area
  2159.   * +32 = +0x20: dword: work_text - color of text in working area
  2160.   * +36 = +0x24: dword: work_graph - color of graphics in working area
  2161. Remarks:
  2162.   * Structure of the color table is described in the standard
  2163.     include file 'macros.inc' as 'system_colors'; for example,
  2164.     it is possible to write:
  2165.         sc      system_colors           ; variable declaration
  2166.         ...                             ; somewhere one must call
  2167.                                         ; this function with ecx=sc
  2168.         mov     ecx, [sc.work_button_text]      ; read text color on
  2169.                                         ; buttin in working area
  2170.   * A program itself desides to use or not to use color table.
  2171.     For usage program must simply at calls to drawing functions select
  2172.     color taken from the table.
  2173.   * At change of the table of standard colors (by subfunction 2 with
  2174.     the subsequent application of changes by subfunction 0 or
  2175.     at skin set by subfunction 8) the system sends to all windows
  2176.     redraw message (the event with code 1).
  2177.   * Color table can be viewed/changed interactively with
  2178.     the application 'desktop'.
  2179.  
  2180. ======================================================================
  2181. ============ Function 48, subfunction 4 - get skin height. ===========
  2182. ======================================================================
  2183. Parameters:
  2184.   * eax = 48 - function number
  2185.   * ebx = 4 - subfunction number
  2186. Returned value:
  2187.   * eax = skin height
  2188. Remarks:
  2189.   * Skin height is defined as the height of a header
  2190.     of skinned windows.
  2191.   * See also general structure of window in the description
  2192.     of function 0.
  2193.  
  2194. ======================================================================
  2195. ======== Function 48, subfunction 5 - get screen working area. =======
  2196. ======================================================================
  2197. Parameters:
  2198.   * eax = 48 - function number
  2199.   * ebx = 5 - subfunction number
  2200. Returned value:
  2201.   * eax = [left]*65536 + [right]
  2202.   * ebx = [top]*65536 + [bottom]
  2203. Remarks:
  2204.   * The screen working area defines position and coordinates of
  2205.     a maximized window.
  2206.   * The screen working area in view of normal work is all screen
  2207.     without system panel (the application '@panel').
  2208.   * (left,top) are coordinates of the left upper corner,
  2209.     (right,bottom) are coordinates of the right lower one.
  2210.     Thus the size of working area on x axis can be calculated by
  2211.     formula right-left+1, on y axis - by formula bottom-right+1.
  2212.   * See also function 14,
  2213.     to get sizes of all screen.
  2214.   * There is a pair function to set working area - subfunction 6.
  2215.  
  2216. ======================================================================
  2217. ======== Function 48, subfunction 6 - set screen working area. =======
  2218. ======================================================================
  2219. Parameters:
  2220.   * eax = 48 - function number
  2221.   * ebx = 6 - subfunction number
  2222.   * ecx = [left]*65536 + [right]
  2223.   * edx = [top]*65536 + [bottom]
  2224. Returned value:
  2225.   * function does not return value
  2226. Remarks:
  2227.   * The screen working area defines position and coordinates of
  2228.     a maximized window.
  2229.   * This function is used only by the application '@panel',
  2230.     which set working area to all screen without system panel.
  2231.   * (left,top) are coordinates of the left upper corner,
  2232.     (right,bottom) are coordinates of the right lower one.
  2233.     Thus the size of working area on x axis can be calculated by
  2234.     formula right-left+1, on y axis - by formula bottom-right+1.
  2235.   * If 'left'>='right', x-coordinate of working area is not changed.
  2236.     If 'left'<0, 'left' will not be set. If 'right' is greater than or
  2237.     equal to screen width, 'right' will not be set.
  2238.     Similarly on y axis.
  2239.   * See also function 14,
  2240.     to get sizes of all screen.
  2241.   * There is a pair function to get working area - subfunction 5.
  2242.   * This function redraws the screen automatically,
  2243.     updating coordinates and sizes of maximized windows.
  2244.     The system sends to all windows redraw message (the event 1).
  2245.  
  2246. ======================================================================
  2247. =========== Function 48, subfunction 7 - get skin margins. ===========
  2248. ======================================================================
  2249. Returns the area of a header of a skinned window, intended for
  2250. a text of a header.
  2251. Parameters:
  2252.   * eax = 48 - function number
  2253.   * ebx = 7 - subfunction number
  2254. Returned value:
  2255.   * eax = [left]*65536 + [right]
  2256.   * ebx = [top]*65536 + [bottom]
  2257. Remarks:
  2258.   * An application decides itself to use or not to use this function.
  2259.   * It is recommended to take into account returned value
  2260.     of this function for choice of a place for drawing header text
  2261.     (by function 4) or a substitute of header text
  2262.     (at the discretion of an application).
  2263.  
  2264. ======================================================================
  2265. ============= Function 48, subfunction 8 - set used skin. ============
  2266. ======================================================================
  2267. Parameters:
  2268.   * eax = 48 - function number
  2269.   * ebx = 8 - subfunction number
  2270.   * ecx = pointer to a block for function 58, in
  2271.     which the fields of intermediate buffer and file name are filled
  2272. Returned value:
  2273.   * eax = 0 - success
  2274.   * otherwise eax = file system error code; if file does not
  2275.     contain valid skin, function returns error 3
  2276.     (unknown file system).
  2277. Remarks:
  2278.   * After successful skin loading the system sends to all windows
  2279.     redraw message (the event 1).
  2280.   * At booting the system reads skin from file 'default.skn'
  2281.     on ramdisk.
  2282.   * User can change the skin statically by creating hisself
  2283.     'default.skn' or dynamically with the application 'desktop'.
  2284.  
  2285. ======================================================================
  2286. =========== Function 49 - Advanced Power Management (APM). ===========
  2287. ======================================================================
  2288. Parameters:
  2289.   * eax = 49 - function number
  2290.   * dx = number of the APM function
  2291.     (analogue of ax in APM specification)
  2292.   * bx, cx = parameters of the APM function
  2293. Returned value:
  2294.   * 16-bit registers ax, bx, cx, dx, si, di and carry flag CF
  2295.     are set according to the APM specification
  2296.   * high halves of 32-bit registers eax, ebx, ecx,
  2297.     edx, esi, edi are destroyed
  2298. Remarks:
  2299.   * APM 1.2 specification is described in the document
  2300.     "Advanced Power Management (APM) BIOS Specification"
  2301.     (Revision 1.2), available at
  2302.     http://www.microsoft.com/whdc/archive/amp_12.mspx;
  2303.     besides it is included in famous Interrupt List by Ralf Brown
  2304.     (http://www.pobox.com/~ralf/files.html,
  2305.     ftp://ftp.cs.cmu.edu/afs/cs/user/ralf/pub/).
  2306.  
  2307. ======================================================================
  2308. =================== Function 50 - set window shape. ==================
  2309. ======================================================================
  2310. Normal windows have rectangular shape. This function can give to
  2311. a window any shape. The shape is given by a set of points inside
  2312. the base rectangle belonging to a window. Position and coordinates
  2313. of the base rectangle are set by function 0
  2314. and changed by function 67.
  2315.  
  2316. --------------------------- Set shape data ---------------------------
  2317. Parameters:
  2318.   * eax = 50 - function number
  2319.   * ebx = 0 - subfunction number
  2320.   * ecx = pointer to shape data (array of bytes 0/1)
  2321. Returned value:
  2322.   * function does not return value
  2323.  
  2324. -------------------------- Set shape scale ---------------------------
  2325. Parameters:
  2326.   * eax = 50 - function number
  2327.   * ebx = 1 - subfunction number
  2328.   * ecx sets a scale: each byte of data defines
  2329.     (2^scale)*(2^scale) pixels
  2330. Returned value:
  2331.   * function does not return value
  2332. Remarks:
  2333.   * Default scale is 0 (scale factor is 1). If in the shape data
  2334.     one byte corresponds to one pixel, there is no necessity
  2335.     to set scale.
  2336.   * Let's designate xsize = window width (in pixels), ysize = height;
  2337.     pay attention, that they are one pixel more than defined by
  2338.     functions 0, 67.
  2339.   * On definition of scale xsize and ysize must be divisible
  2340.     on 2^scale.
  2341.   * Byte of data on offset 'a' must be 0/1 and defines belonging
  2342.     to a window of square with the side 2^scale (if scale=0,
  2343.     this is one pixel) and coordinates of the left upper corner
  2344.     (a mod (xsize shr scale), a div (xsize shr scale))
  2345.   * Data size: (xsize shr scale)*(ysize shr scale).
  2346.   * Data must be presented in the memory and not change
  2347.     after set of shape.
  2348.   * The system views the shape data at every window redraw by
  2349.     function 0.
  2350.   * The call of subfunction 0 with NULL pointer results in return
  2351.     to the rectangular shape.
  2352.  
  2353. ======================================================================
  2354. ==================== Function 51 - create thread. ====================
  2355. ======================================================================
  2356. Parameters:
  2357.   * eax = 51 - function number
  2358.   * ebx = 1 - unique subfunction
  2359.   * ecx = address of thread entry point (starting eip)
  2360.   * edx = pointer to thread stack (starting esp)
  2361. Returned value:
  2362.   * eax = -1 - error (there is too many threads)
  2363.   * otherwise eax = TID - thread identifier
  2364.     </UL>
  2365.  
  2366. ======================================================================
  2367. === Function 52, subfunction 0 - get network driver configuration. ===
  2368. ======================================================================
  2369. Parameters:
  2370.   * eax = 52 - function number
  2371.   * ebx = 0 - subfunction number
  2372. Returned value:
  2373.   * eax = configuration dword
  2374. Remarks:
  2375.   * Configuration dword can be set by subfunction 2.
  2376.   * The kernel does not use this variable. The value of this
  2377.     variable and working with it subfunctions 0 and 2 is represented
  2378.     doubtful.
  2379.  
  2380. ======================================================================
  2381. ========= Function 52, subfunction 1 - get local IP-address. =========
  2382. ======================================================================
  2383. Parameters:
  2384.   * eax = 52 - function number
  2385.   * ebx = 1 - subfunction number
  2386. Returned value:
  2387.   * eax = IP-address (4 bytes)
  2388. Remarks:
  2389.   * Local IP-address is set by subfunction 3.
  2390.  
  2391. ======================================================================
  2392. === Function 52, subfunction 2 - set network driver configuration. ===
  2393. ======================================================================
  2394. Parameters:
  2395.   * eax = 52 - function number
  2396.   * ebx = 2 - subfunction number
  2397.   * ecx = configuration dword; if low 7 bits derivate the number 3,
  2398.     function [re-]initializes Ethernet-card, otherwise
  2399.     Ethernet turns off
  2400. Returned value:
  2401.   * if Ethernet-interface is not requested, function returns eax=2,
  2402.     but this can be changed in future kernel versions
  2403.   * if Ethernet-interface is requested, eax=0 means error
  2404.     (absence of Ethernet-card), and nonzero value - success
  2405. Remarks:
  2406.   * Configuration dword can be read by subfunction 0.
  2407.   * The kernel does not use this variable. The value of this
  2408.     variable, subfunction 0 and part of subfunction 2, which set it,
  2409.     is represented doubtful.
  2410.  
  2411. ======================================================================
  2412. ========= Function 52, subfunction 3 - set local IP-address. =========
  2413. ======================================================================
  2414. Parameters:
  2415.   * eax = 52 - function number
  2416.   * ebx = 3 - subfunction number
  2417.   * ecx = IP-address (4 bytes)
  2418. Returned value:
  2419.   * the current implementation returns eax=3, but this can be changed
  2420.     in future versions
  2421. Remarks:
  2422.   * Local IP-address can be get by subfunction 1.
  2423.  
  2424. ======================================================================
  2425. = Function 52, subfunction 6 - add data to the stack of input queue. =
  2426. ======================================================================
  2427. Parameters:
  2428.   * eax = 52 - function number
  2429.   * ebx = 6 - subfunction number
  2430.   * edx = data size
  2431.   * esi = data pointer
  2432. Returned value:
  2433.   * eax = -1 - error
  2434.   * eax = 0 - success
  2435. Remarks:
  2436.   * This function is intended only for slow network drivers
  2437.     (PPP, SLIP).
  2438.   * Data size must not exceed 1500 bytes, though function
  2439.     performs no checks on correctness.
  2440.  
  2441. ======================================================================
  2442.  Function 52, subfunction 8 - read data from the network output queue.
  2443. ======================================================================
  2444. Parameters:
  2445.   * eax = 52 - function number
  2446.   * ebx = 8 - subfunction number
  2447.   * esi = pointer to 1500-byte buffer
  2448. Returned value:
  2449.   * eax = number of read bytes (in the current implementation
  2450.     either 0 = no data or 1500)
  2451.   * data was copied in buffer
  2452. Remarks:
  2453.   * This function is intended only for slow network drivers
  2454.     (PPP, SLIP).
  2455.  
  2456. ======================================================================
  2457. ============ Function 52, subfunction 9 - get gateway IP. ============
  2458. ======================================================================
  2459. Parameters:
  2460.   * eax = 52 - function number
  2461.   * ebx = 9 - subfunction number
  2462. Returned value:
  2463.   * eax = gateway IP (4 bytes)
  2464.  
  2465. ======================================================================
  2466. =========== Function 52, subfunction 10 - get subnet mask. ===========
  2467. ======================================================================
  2468. Parameters:
  2469.   * eax = 52 - function number
  2470.   * ebx = 10 - subfunction number
  2471. Returned value:
  2472.   * eax = subnet mask
  2473.  
  2474. ======================================================================
  2475. ============ Function 52, subfunction 11 - set gateway IP. ===========
  2476. ======================================================================
  2477. Parameters:
  2478.   * eax = 52 - function number
  2479.   * ebx = 11 - subfunction number
  2480.   * ecx = gateway IP (4 bytes)
  2481. Returned value:
  2482.   * the current implementation returns eax=11, but this can be changed
  2483.     in future versions
  2484.  
  2485. ======================================================================
  2486. =========== Function 52, subfunction 12 - set subnet mask. ===========
  2487. ======================================================================
  2488. Parameters:
  2489.   * eax = 52 - function number
  2490.   * ebx = 12 - subfunction number
  2491.   * ecx = subnet mask
  2492. Returned value:
  2493.   * the current implementation returns eax=12, but this can be changed
  2494.     in future versions
  2495.  
  2496. ======================================================================
  2497. ============== Function 52, subfunction 13 - get DNS IP. =============
  2498. ======================================================================
  2499. Parameters:
  2500.   * eax = 52 - function number
  2501.   * ebx = 13 - subfunction number
  2502. Returned value:
  2503.   * eax = DNS IP (4 bytes)
  2504.  
  2505. ======================================================================
  2506. ============== Function 52, subfunction 14 - set DNS IP. =============
  2507. ======================================================================
  2508. Parameters:
  2509.   * eax = 52 - function number
  2510.   * ebx = 14 - subfunction number
  2511.   * ecx = DNS IP (4 bytes)
  2512. Returned value:
  2513.   * the current implementation returns eax=14, but this can be changed
  2514.     in future versions
  2515.  
  2516. ======================================================================
  2517. ======== Function 52, subfunction 15 - get local MAC address. ========
  2518. ======================================================================
  2519. Parameters:
  2520.   * eax = 52 - function number
  2521.   * ebx = 15 - subfunction number
  2522.   * ecx = 0 - read first 4 bytes,
  2523.     ecx = 4 - read last 2 bytes
  2524. Returned value:
  2525.   * for ecx=0: eax = first 4 bytes of MAC address
  2526.   * for ecx=4: ax = last 2 bytes of MAC address,
  2527.                high half of eax is destroyed
  2528.   * for other ecx: eax = -1 indicates an error
  2529.  
  2530. ======================================================================
  2531. ============ Function 53, subfunction 0 - open UDP-socket. ===========
  2532. ======================================================================
  2533. Parameters:
  2534.   * eax = 53 - function number
  2535.   * ebx = 0 - subfunction number
  2536.   * ecx = local port (only low word is taken into account),
  2537.     ecx = 0 - let the system choose a port
  2538.   * edx = remote port (only low word is taken into account)
  2539.   * esi = remote IP
  2540. Returned value:
  2541.   * eax = -1 = 0xFFFFFFFF - error; ebx destroyed
  2542.   * eax = socket handle (some number which unambiguously identifies
  2543.     socket and have sense only for the system) - success;
  2544.     ebx destroyed
  2545.  
  2546. ======================================================================
  2547. =========== Function 53, subfunction 1 - close UDP-socket. ===========
  2548. ======================================================================
  2549. Parameters:
  2550.   * eax = 53 - function number
  2551.   * ebx = 1 - subfunction number
  2552.   * ecx = socket handle
  2553. Returned value:
  2554.   * eax = -1 - incorrect handle
  2555.   * eax = 0 - success
  2556.   * ebx destroyed
  2557. Remarks:
  2558.   * The current implementation does not close automatically all
  2559.     sockets of a thread at termination. In particular, one should not
  2560.     kill a thread with many opened sockets - there will be an outflow
  2561.     of resources.
  2562.  
  2563. ======================================================================
  2564. ============== Function 53, subfunction 2 - poll socket. =============
  2565. ======================================================================
  2566. Parameters:
  2567.   * eax = 53 - function number
  2568.   * ebx = 2 - subfunction number
  2569.   * ecx = socket handle
  2570. Returned value:
  2571.   * eax = number of read bytes, 0 for incorrect handle
  2572.   * ebx destroyed
  2573.  
  2574. ======================================================================
  2575. ========= Function 53, subfunction 3 - read byte from socket. ========
  2576. ======================================================================
  2577. Parameters:
  2578.   * eax = 53 - function number
  2579.   * ebx = 3 - subfunction number
  2580.   * ecx = socket handle
  2581. Returned value:
  2582.   * if there is no read data or handle is incorrect: eax=0, bl=0,
  2583.     other bytes of ebx are destroyed
  2584.   * if there are read data: eax=number of rest bytes
  2585.     (possibly 0), bl=read byte, other bytes of ebx are destroyed
  2586.  
  2587. ======================================================================
  2588. ========== Function 53, subfunction 4 - write to UDP-socket. =========
  2589. ======================================================================
  2590. Parameters:
  2591.   * eax = 53 - function number
  2592.   * ebx = 4 - subfunction number
  2593.   * ecx = socket handle
  2594.   * edx = number of bytes to write
  2595.   * esi = pointer to data to write
  2596. Returned value:
  2597.   * eax = 0xffffffff - error (invalid handle or not enough memory)
  2598.   * eax = 0 - success
  2599.   * ebx destroyed
  2600. Remarks:
  2601.   * Number of bytes to write must not exceed 1500-28, though
  2602.     the appropriate check is not made.
  2603.  
  2604. ======================================================================
  2605. ============ Function 53, subfunction 5 - open TCP-socket. ===========
  2606. ======================================================================
  2607. Parameters:
  2608.   * eax = 53 - function number
  2609.   * ebx = 5 - subfunction number
  2610.   * ecx = local port (only low word is taken into account),
  2611.     ecx = 0 - let the system choose a port
  2612.   * edx = remote port (only low word is taken into account)
  2613.   * esi = remote IP
  2614.   * edi = open mode: SOCKET_PASSIVE=0 or SOCKET_ACTIVE=1
  2615. Returned value:
  2616.   * eax = -1 = 0xFFFFFFFF - error; ebx destroys
  2617.   * eax = socket handle (some number which unambiguously identifies
  2618.     socket and have sense only for the system) - success;
  2619.     ebx destroyed
  2620.  
  2621. ======================================================================
  2622. ========= Function 53, subfunction 6 - get TCP-socket status. ========
  2623. ======================================================================
  2624. Parameters:
  2625.   * eax = 53 - function number
  2626.   * ebx = 6 - subfunction number
  2627.   * ecx = socket handle
  2628. Returned value:
  2629.   * eax = 0 for incorrect handle or socket status: one of
  2630.   * TCB_LISTEN = 1
  2631.   * TCB_SYN_SENT = 2
  2632.   * TCB_SYN_RECEIVED = 3
  2633.   * TCB_ESTABLISHED = 4
  2634.   * TCB_FIN_WAIT_1 = 5
  2635.   * TCB_FIN_WAIT_2 = 6
  2636.   * TCB_CLOSE_WAIT = 7
  2637.   * TCB_CLOSING = 8
  2638.   * TCB_LAST_ASK = 9
  2639.   * TCB_TIME_WAIT = 10
  2640.   * TCB_CLOSED = 11
  2641.   * ebx destroyed
  2642.  
  2643. ======================================================================
  2644. ========== Function 53, subfunction 7 - write to TCP-socket. =========
  2645. ======================================================================
  2646. Parameters:
  2647.   * eax = 53 - function number
  2648.   * ebx = 7 - subfunction number
  2649.   * ecx = socket handle
  2650.   * edx = number of bytes to write
  2651.   * esi = pointer to data to write
  2652. Returned value:
  2653.   * eax = 0xffffffff - error (invalid handle or not enough memory)
  2654.   * eax = 0 - success
  2655.   * ebx destroyed
  2656. Remarks:
  2657.   * Number of bytes to write must not exceed 1500-40, though
  2658.     the appropriate check is not made.
  2659.  
  2660. ======================================================================
  2661. =========== Function 53, subfunction 8 - close TCP-socket. ===========
  2662. ======================================================================
  2663. Parameters:
  2664.   * eax = 53 - function number
  2665.   * ebx = 8 - subfunction number
  2666.   * ecx = socket handle
  2667. Returned value:
  2668.   * eax = -1 - error (invalid handle or
  2669.     not enough memory for socket close packet)
  2670.   * eax = 0 - success
  2671.   * ebx destroyed
  2672. Remarks:
  2673.   * The current implementation does not close automatically all
  2674.     sockets of a thread at termination. In particular, one should not
  2675.     kill a thread with many opened sockets - there will be an outflow
  2676.     of resources.
  2677.  
  2678. ======================================================================
  2679. === Function 53, subfunction 9 - check whether local port is free. ===
  2680. ======================================================================
  2681. Parameters:
  2682.   * eax = 53 - function number
  2683.   * ebx = 9 - subfunction number
  2684.   * ecx = local port number (low 16 bits are used only)
  2685. Returned value:
  2686.   * eax = 0 - port is used
  2687.   * eax = 1 - port is free
  2688.   * ebx destroyed
  2689.  
  2690. ======================================================================
  2691. ===== Function 53, subfunction 10 - query Ethernet cable status. =====
  2692. ======================================================================
  2693. Parameters:
  2694.   * eax = 53 - function number
  2695.   * ebx = 10 - subfunction number
  2696. Returned value:
  2697.   * al = -1 - a network driver is not loaded or
  2698.               does not support this function
  2699.   * al = 0 - Ethernet cable is unplugged
  2700.   * al = 1 - Ethernet cable is plugged
  2701.   * ebx destroyed
  2702. Remarks:
  2703.   * The current kernel implementation supports this function
  2704.     only for RTL8139 network cards.
  2705.  
  2706. ======================================================================
  2707. ======= Function 53, subfunction 11 - read network stack data. =======
  2708. ======================================================================
  2709. Paramters:
  2710.   * eax = 53 - function number
  2711.   * ebx = 11 - subfunction number
  2712.   * ecx = socket handle
  2713.   * edx = pointer to buffer
  2714.   * esi = number of bytes to read;
  2715.   * esi = 0 - read all data (maximum 4096 bytes)
  2716. Returned value:
  2717.   * eax = number of bytes read (0 for incorrect handle)
  2718.   * ebx destroyed
  2719.  
  2720. ======================================================================
  2721. = Function 53, subfunction 255 - debug information of network driver.
  2722. ======================================================================
  2723. Parameters:
  2724.   * eax = 53 - function number
  2725.   * ebx = 255 - subfunction number
  2726.   * ecx = type of requested information (see below)
  2727. Returned value:
  2728.   * eax = requested information
  2729.   * ebx destroyed
  2730. Possible values for ecx:
  2731.   * 100: length of queue 0 (empty queue)
  2732.   * 101: length of queue 1 (ip-out queue)
  2733.   * 102: length of queue 2 (ip-in queue)
  2734.   * 103: length of queue 3 (net1out queue)
  2735.   * 200: number of items in the ARP table
  2736.   * 201: size of the ARP table (in items) (20 for current version)
  2737.   * 202: read item at edx of the ARP table to the temporary buffer,
  2738.     whence 5 following types take information;
  2739.     in this case eax is not defined
  2740.   * 203: IP-address saved by type 202
  2741.   * 204: high dword of MAC-address saved by type 202
  2742.   * 205: low word of MAC-address saved by type 202
  2743.   * 206: status word saved by type 202
  2744.   * 207: ttl word saved by type 202
  2745.   * 2: total number of received IP-packets
  2746.   * 3: total number of transferred IP-packets
  2747.   * 4: total number of dumped received packets
  2748.   * 5: total number of received ARP-packets
  2749.   * 6: status of packet driver, 0=inactive, nonzero=active
  2750.  
  2751. ======================================================================
  2752.  Function 55, subfunction 55 - begin to play data on built-in speaker.
  2753. ======================================================================
  2754. Parameters:
  2755.   * eax = 55 - function number
  2756.   * ebx = 55 - subfunction number
  2757.   * esi = pointer to data
  2758. Returned value:
  2759.   * eax = 0 - success
  2760.   * eax = 55 - error (speaker is off or busy)
  2761. Data is an array of items with variable length.
  2762. Format of each item is defined by first byte:
  2763.   * 0 = end of data
  2764.   * 1..0x80 = sets sound duration on 1/100 of second; sound note
  2765.     is defined by immediate value of frequency
  2766.     * following word (2 bytes) contains frequency divider;
  2767.       frequency is defined as 1193180/divider
  2768.   * 0x81 = invalid
  2769.   * 0x82..0xFF = note is defined by octave and number:
  2770.     * duration in 1/100 of second = (first byte)-0x81
  2771.     * there is one more byte;
  2772.     * (second byte)=0xFF - delay
  2773.     * otherwise it looks like a*0x10+b, where b=number of the note in
  2774.       an octave from 1 to 12, a=number of octave (beginning from 0)
  2775. Remarks:
  2776.   * Speaker play can be disabled/enabled by
  2777.     subfunction 8 of function 18.
  2778.   * Function returns control, having informed the system
  2779.     an information on request. Play itself goes independently from
  2780.     the program.
  2781.   * The data must be kept in the memory at least up to the end
  2782.     of play.
  2783.  
  2784. ======================================================================
  2785. ======================= Function 57 - PCI BIOS. ======================
  2786. ======================================================================
  2787. Parameters:
  2788.   * eax = 57 - function number
  2789.   * ebp corresponds to al in PCI BIOS specification
  2790.   * other registers are set according to PCI BIOS specification
  2791. Returned value:
  2792.   * CF is undefined
  2793.   * other registers are set according to PCI BIOS specification
  2794. Remarks:
  2795.   * Many effects of this function can be also achieved with
  2796.     corresponding subfunctions of function 62.
  2797.   * The function calls PCI32 BIOS extension, documented e.g. in
  2798.     http://alpha1.dyns.net/files/PCI/bios21.pdf.
  2799.   * If BIOS does not support this extension, its behavior is emulated
  2800.     (through kernel-mode analogues of subfunctions of function 62).
  2801.  
  2802. ======================================================================
  2803. ================ Function 58 - work with file system. ================
  2804. ======================================================================
  2805. Parameters:
  2806.   * eax = 58
  2807.   * ebx = pointer to the information structure
  2808. Returned value:
  2809.   * eax = 0 - success; otherwise file system error code
  2810.   * some subfunctions return value in other registers too
  2811. General format of the information structure:
  2812.   * +0: dword: subfunction number
  2813.   * +4: dword: number of block
  2814.   * +8: dword: size
  2815.   * +12 = +0xC: dword: pointer to data
  2816.   * +16 = +0x10: dword: pointer to a memory for system operations
  2817.     (4096 bytes)
  2818.   * +20 = +0x14: n db: ASCIIZ-string with the file name
  2819. Specifications - in documentation on the appropriate subfunction.
  2820. Filename is case-insensitive for latin letters, russian letters
  2821. must be capital.
  2822. Format of filename:
  2823. /base/number/dir1/dir2/.../dirn/file,
  2824. where /base/number identifies device, on which file is located:
  2825. one of
  2826.   * /RD/1 = /RAMDISK/1 to access ramdisk
  2827.   * /FD/1 = /FLOPPYDISK/1 to access first floppy drive,
  2828.     /FD/2 = /FLOPPYDISK/2 to access second one
  2829.   * /HD/x = /HARDDISK/x - obsolete variant of access to hard disk
  2830.     (in this case base is defined by subfunction 7 of function 21),
  2831.     x - partition number (beginning from 1)
  2832.   * /HD0/x, /HD1/x, /HD2/x, /HD3/x to access accordingly to devices
  2833.     IDE0 (Primary Master), IDE1 (Primary Slave),
  2834.     IDE2 (Secondary Master), IDE3 (Secondary Slave);
  2835.     x - partition number on the selected hard drive, varies from 1
  2836.     to 255 (on each hard drive the indexing starts from 1)
  2837. Remarks:
  2838.   * In the first two cases it is also possible to use FIRST
  2839.     instead of 1, SECOND instead of 2, but it is not recommended
  2840.     for convenience of transition to the future extensions.
  2841.   * Limitation n<=39 is imposed.
  2842.   * Names of folders and file dir1,...,dirn,file must have the
  2843.     format 8.3: name no more than 8 characters, dot, extension no
  2844.     more than 3 characters. Trailing spaces are ignored, no other
  2845.     spaces is allowed. If name occupies equally 8 characters,
  2846.     dot may be omitted (though it is not recommended to use this
  2847.     feature for convenience of transition to the future extensions).
  2848.   * This function does not support folders on ramdisk.
  2849. Examples:
  2850.   * '/RAMDISK/FIRST/KERNEL.ASM',0
  2851.     '/rd/1/kernel.asm',0
  2852.   * '/HD0/1/kernel.asm',0
  2853.   * '/hd0/1/menuet/pics/tanzania.bmp',0
  2854. Existing subfunctions:
  2855.   * subfunction 0 - read file/folder
  2856.   * subfunction 8 - LBA-read from device
  2857.   * subfunction 15 - get file system information
  2858.  
  2859. ======================================================================
  2860. =========== Function 58, subfunction 0 - read file/folder. ===========
  2861. ======================================================================
  2862. Parameters:
  2863.   * eax = 58
  2864.   * ebx = pointer to the information structure
  2865. Format of the information structure:
  2866.   * +0: dword: 0 = subfunction number
  2867.   * +4: dword: first block to read (beginning from 0)
  2868.   * +8: dword: amount of blocks to read
  2869.   * +12 = +0xC: dword: pointer to buffer for data
  2870.   * +16 = +0x10: dword: pointer to buffer for system operations
  2871.     (4096 bytes)
  2872.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  2873.     given in the general description
  2874. Returned value:
  2875.   * eax = 0 - success, otherwise file system error code
  2876.   * ebx = file size (in bytes) or -1=0xffffffff, if file was not found
  2877. Remarks:
  2878.   * Block size is 512 bytes.
  2879.   * This function is obsolete, for reading files use subfunction 0
  2880.     of function 70, for reading folders - subfunction 1 of
  2881.     function 70.
  2882.   * Function can read contents of a folder. Only FAT file system is
  2883.     supported. The format of FAT-folder is described
  2884.     in any FAT documentation.
  2885.   * Size of a folder is determined by size of FAT clusters chain.
  2886.   * If file was ended before last requested block was read,
  2887.     the function will read as many as it can, and after that return
  2888.     eax=6 (EOF).
  2889.   * Function can read root folders /rd/1,/fd/x,/hd[n]/x, but
  2890.     in the first two cases the current implementation does not follow
  2891.     to the declared rules:
  2892.     for /rd/1:
  2893.     * if one want to read 0 blocks, function considers,
  2894.       that he requested 1;
  2895.     * if one requests more than 14 blocks or starting block is
  2896.       not less than 14, function returns eax=5 (not found) è ebx=-1;
  2897.     * size of ramdisk root folder is 14 blocks,
  2898.       0x1C00=7168 áàéò; but function returns ebx=0
  2899.       (except of the case of previous item);
  2900.     * strangely enough, it is possible to read 14th block (which
  2901.       generally contains a garbage - I remind, the indexing begins
  2902.       from 0);
  2903.     * if some block with the number not less than 14 was requested,
  2904.       function returns eax=6(EOF); otherwise eax=0.
  2905.     For /fd/x:
  2906.     * if the start block is not less than 14, function returns
  2907.       eax=5 (not found) and ebx=0;
  2908.     * note that format of FAT12 allows floppies with the root size
  2909.       more or less than 14 blocks;
  2910.     * check for length is not performed;
  2911.     * if data was successful read, function returns
  2912.       eax=0,ebx=0; otherwise eax=10 (access denied), ebx=-1.
  2913.   * The function handles reading of special folders /,/rd,/fd,/hd[n];
  2914.     but the result does not correspond to expected (on operations with
  2915.     normal files/folders), does not follow the declared rules,
  2916.     may be changed in future versions of the kernel and consequently
  2917.     is not described. To obtain the information about the equipment
  2918.     use subfunction 11 of function 18 or
  2919.     read corresponding folder with subfunction 1 of function 70.
  2920.  
  2921. ======================================================================
  2922. ========= Function 58, subfunction 8 - LBA-read from device. =========
  2923. ======================================================================
  2924. Parameters:
  2925.   * eax = 58 - function number
  2926.   * ebx = pointer to the information structure
  2927. Format of the information structure:
  2928.   * +0: dword: 8 = subfunction number
  2929.   * +4: dword: number of block to read (beginning from 0)
  2930.   * +8: dword: ignored (set to 1)
  2931.   * +12 = +0xC: dword: pointer to buffer for data (512 bytes)
  2932.   * +16 = +0x10: dword: pointer to buffer for system operations
  2933.     (4096 bytes)
  2934.   * +20 = +0x14: ASCIIZ-name of device: case-insensitive, one of
  2935.     /rd/1 = /RamDisk/1, /hd/n = /HardDisk/n,
  2936.     1<=n<=4 - number of device: 1=IDE0, ..., 4=IDE3.
  2937.     Instead of digits it is allowed, though not recommended for
  2938.     convenience of transition to future extensions, to use
  2939.     'first','second','third','fourth'.
  2940. Returned value:
  2941.   * for device name /hd/xxx, where xxx is not in the list above:
  2942.     * eax = ebx = 1
  2943.   * for invalid device name (except for the previous case):
  2944.     * eax = 5
  2945.     * ebx does not change
  2946.   * if LBA-access is disabled by subfunction 11 of function 21:
  2947.     * eax = 2
  2948.     * ebx destroyed
  2949.   * for ramdisk: attempt to read block outside ramdisk
  2950.     (18*2*80 blocks) results in
  2951.     * eax = 3
  2952.     * ebx = 0
  2953.   * for successful read:
  2954.     * eax = ebx = 0
  2955. Remarks:
  2956.   * Block size is 512 bytes; function reads one block.
  2957.   * Do not depend on returned value, it can be changed
  2958.     in future versions.
  2959.   * Function requires that LBA-access to devices is enabled by
  2960.     subfunction 11 of function 21. To check this one can use
  2961.     subfunction 11 of function 26.
  2962.   * LBA-read of floppy is not supported.
  2963.   * Function reads data on physical hard drive; if for any reason
  2964.     data of the concrete partition are required, application must
  2965.     define starting sector of this partition (either directly
  2966.     through MBR, or from the full structure returned by
  2967.     ïîäôóíêöèåé 11 ôóíêöèè 18).
  2968.   * Function does not check error code of hard disk, so request of
  2969.     nonexisting sector reads something (most probably it will be
  2970.     zeroes, but this is defined by device) and this is considered
  2971.     as success (eax=0).
  2972.  
  2973. ======================================================================
  2974. ==== Function 58, subfunction 15 - get information on file system. ===
  2975. ======================================================================
  2976. Parameters:
  2977.   * eax = 58 - function number
  2978.   * ebx = pointer to the information structure
  2979. Format of the information structure:
  2980.   * +0: dword: 15 = subfunction number
  2981.   * +4: dword: ignored
  2982.   * +8: dword: ignored
  2983.   * +12 = +0xC: dword: ignored
  2984.   * +16 = +0x10: dword: ignored
  2985.   * +20 = +0x14: (only second character is checked)
  2986.     /rd=/RAMDISK or /hd=/HARDDISK
  2987. Returned value:
  2988.   * if the second character does not belong to set {'r','R','h','H'}:
  2989.     * eax = 3
  2990.     * ebx = ecx = dword [fileinfo] = 0
  2991.   * for ramdisk:
  2992.     * eax = 0 (success)
  2993.     * ebx = total number of clusters = 2847
  2994.     * ecx = number of free clusters
  2995.     * dword [fileinfo] = cluster size = 512
  2996.   * for hard disk: base and partition are defined by subfunctions
  2997.     7 and 8 of function 21:
  2998.     * eax = 0 (success)
  2999.     * ebx = total number of clusters
  3000.     * ecx = number of free clusters
  3001.     * dword [fileinfo] = cluster size (in bytes)
  3002. Remarks:
  3003.   * Be not surprised to strange layout of 4th returned parameter
  3004.     - when this code was writing, at system calls application got
  3005.     only registers eax,ebx,ecx (from pushad-structure transmitted
  3006.     as argument to the system function). Now it is corrected, so,
  3007.     probably, it is meaningful to return cluster size in edx, while
  3008.     this function is not used yet.
  3009.   * There exists also subfunction 11 of function 18,
  3010.     which returns information on file system. From the full table
  3011.     of disk subsystem it is possible to deduce cluster size (there
  3012.     it is stored in sectors) and total number of clusters
  3013.     for hard disks.
  3014.  
  3015. ======================================================================
  3016. ========== Function 60 - Inter Process Communication (IPC). ==========
  3017. ======================================================================
  3018. IPC is used for message dispatching from one process/thread to
  3019. another. Previously it is necessary to agree how to interpret
  3020. the concrete message.
  3021.  
  3022. ----------- Subfunction 1 - set the area for IPC receiving -----------
  3023. Is called by process-receiver.
  3024. Parameters:
  3025.   * eax = 60 - function number
  3026.   * ebx = 1 - subfunction number
  3027.   * ecx = pointer to the buffer
  3028.   * edx = size of the buffer
  3029. Returned value:
  3030.   * eax = 0 - always success
  3031. Format of IPC-buffer:
  3032.   * +0: dword: if nonzero, buffer is considered locked;
  3033.     lock/unlock the buffer, when you work with it and need that
  3034.     buffer data are not changed from outside (no new messages)
  3035.   * +4: dword: occupied place in the buffer (in bytes)
  3036.   * +8: first message
  3037.   * +8+n: second message
  3038.   * ...
  3039. Format of a message:
  3040.   * +0: dword: PID of sender
  3041.   * +4: dword: message length (not including this header)
  3042.   * +8: n*byte: message data
  3043.  
  3044. ------------------ Subfunction 2 - send IPC message ------------------
  3045. Is called by process-sender.
  3046. Parameters:
  3047.   * eax = 60 - function number
  3048.   * ebx = 2 - subfunction number
  3049.   * ecx = PID of receiver
  3050.   * edx = pointer to the message data
  3051.   * esi = message length (in bytes)
  3052. Returned value:
  3053.   * eax = 0 - success
  3054.   * eax = 1 - the receiver has not defined buffer for IPC messages
  3055.     (can be, still have no time,
  3056.     and can be, this is not right process)
  3057.   * eax = 2 - the receiver has blocked IPC-buffer; try to wait a bit
  3058.   * eax = 3 - overflow of IPC-buffer of the receiver
  3059.   * eax = 4 - process/thread with such PID does not exist
  3060. Remarks:
  3061.   * Immediately after writing of IPC-message to the buffer the system
  3062.     sends to the receiver the event with code 7 (see event codes).
  3063.  
  3064. ======================================================================
  3065. ==== Function 61 - get parameters for the direct graphics access. ====
  3066. ======================================================================
  3067. The data of the graphics screen (the memory area which displays
  3068. screen contents) are accessible to a program directly, without
  3069. any system calls, through the selector gs:
  3070.         mov     eax, [gs:0]
  3071. places in eax the first dword of the buffer, which contains
  3072. information on color of the left upper point (and, possibly, colors
  3073. of several following).
  3074.         mov     [gs:0], eax
  3075. by work in VESA modes with LFB sets color of the left upper point
  3076. (and, possibly, colors of several following).
  3077. To interpret the data of graphics screen program needs to know
  3078. some parameters, returning by this function.
  3079. Remarks:
  3080.   * Graphics parameters changes very seldom at work,
  3081.     namely, only in cases, when user works with the application VRR.
  3082.   * At videomode change the system redraws all windows (event
  3083.     with code 1) and redraws the background (event 5).
  3084.     Same events occur in other cases too, which meet much more often,
  3085.     than videomode change.
  3086.   * By operation in videomodes with LFB the selector gs points to
  3087.     LFB itself, so reading/writing on gs result directly in
  3088.     change of screen contents. By operation in videomodes without
  3089.     LFB gs points to some data area in the kernel, and all functions
  3090.     of screen output fulfil honesty double operation on writing
  3091.     directly to the screen and writing to this buffer. In result
  3092.     at reading contents of this buffer the results correspond to
  3093.     screen contents (with, generally speaking, large color
  3094.     resolution), and writing is ignored.
  3095.     One exception is the mode 320*200, for which main loop of the
  3096.     system thread updates the screen according to mouse movements.
  3097.  
  3098. ------------------------- Screen resolution --------------------------
  3099. Parameters:
  3100.   * eax = 61 - function number
  3101.   * ebx = 1 - subfunction number
  3102. Returned value:
  3103.   * eax = [resolution on x axis]*65536 + [resolution on y axis]
  3104. Remarks:
  3105.   * One can use function 14 paying attention that
  3106.     it returns sizes on 1 pixel less. It is fully equivalent way.
  3107.  
  3108. ---------------------- Number of bits per pixel ----------------------
  3109. Parameters:
  3110.   * eax = 61 - function number
  3111.   * ebx = 2 - subfunction number
  3112. Returned value:
  3113.   * eax = number of bits per pixel (24 or 32)
  3114.  
  3115. -------------------- Number of bytes per scanline --------------------
  3116. Parameters:
  3117.   * eax = 61 - function number
  3118.   * ebx = 3 - subfunction number
  3119. Returned value:
  3120.   * eax = number of bytes occupied by one scanline
  3121.     (horizontal line on the screen)
  3122.  
  3123. ======================================================================
  3124. ===== Function 62, subfunction 0 - get version of PCI-interface. =====
  3125. ======================================================================
  3126. Parameters:
  3127.   * eax = 62 - function number
  3128.   * bl = 0 - subfunction number
  3129. Returned value:
  3130.   * eax = -1 - PCI access is disabled; otherwise
  3131.   * ah.al = version of PCI-interface (ah=version, al=subversion)
  3132.   * high word of eax is zeroed
  3133. Remarks:
  3134.   * Previously low-level access to PCI for applications must be
  3135.     enabled by subfunction 12 of function 21.
  3136.   * If PCI BIOS is not supported, the value of ax is undefined.
  3137.  
  3138. ======================================================================
  3139. ==== Function 62, subfunction 1 - get number of the last PCI-bus. ====
  3140. ======================================================================
  3141. Parameters:
  3142.   * eax = 62 - function number
  3143.   * bl = 1 - subfunction number
  3144. Returned value:
  3145.   * eax = -1 - access to PCI is disabled; otherwise
  3146.   * al = number of the last PCI-bus; other bytes of eax are destroyed
  3147. Remarks:
  3148.   * Previously low-level access to PCI for applications must be
  3149.     enabled by subfunction 12 of function 21.
  3150.   * If PCI BIOS is not supported, the value of ax is undefined.
  3151.  
  3152. ======================================================================
  3153. ===================== Function 62, subfunction 2 =====================
  3154. ===== Get mechanism of addressing to the PCI configuration space. ====
  3155. ======================================================================
  3156. Parameters:
  3157.   * eax = 62 - function number
  3158.   * bl = 2 - subfunction number
  3159. Returned value:
  3160.   * eax = -1 - access to PCI is disabled; otherwise
  3161.   * al = mechanism (1 or 2); other bytes of eax are destroyed
  3162. Remarks:
  3163.   * Previously low-level access to PCI for applications must be
  3164.     enabled by subfunction 12 of function 21.
  3165.   * Addressing mechanism is selected depending on
  3166.     equipment characteristics.
  3167.   * Subfunctions of read and write work automatically
  3168.     with the selected mechanism.
  3169.  
  3170. ======================================================================
  3171. ======== Function 62, subfunctions 4,5,6 - read PCI-register. ========
  3172. ======================================================================
  3173. Parameters:
  3174.   * eax = 62 - function number
  3175.   * bl = 4 - read byte
  3176.   * bl = 5 - read word
  3177.   * bl = 6 - read dword
  3178.   * bh = number of PCI-bus
  3179.   * ch = dddddfff, where ddddd = number of the device on the bus,
  3180.     fff = function number of device
  3181.   * cl = number of register (must be even for bl=5,
  3182.     divisible by 4 for bl=6)
  3183. Returned value:
  3184.   * eax = -1 - error (access to PCI is disabled or parameters
  3185.     are not supported); otherwise
  3186.   * al/ax/eax (depending on requested size) contains the data;
  3187.     the other part of register eax is destroyed
  3188. Remarks:
  3189.   * Previously low-level access to PCI for applications must be
  3190.     enabled by subfunction 12 of function 21.
  3191.   * Access mechanism 2 supports only 16 devices on a bus and ignores
  3192.     function number. To get access mechanism use subfunction 2.
  3193.   * Some registers are standard and exist for all devices, some are
  3194.     defined by the concrete device. The list of registers of the
  3195.     first type can be found e.g. in famous
  3196.     Interrupt List by Ralf Brown
  3197.     (http://www.pobox.com/~ralf/files.html,
  3198.     ftp://ftp.cs.cmu.edu/afs/cs/user/ralf/pub/);
  3199.     registers of the second type must be listed
  3200.     in the device documentation.
  3201.  
  3202. ======================================================================
  3203. ====== Function 62, subfunctions 8,9,10 - write to PCI-register. =====
  3204. ======================================================================
  3205. Parameters:
  3206.   * eax = 62 - function number
  3207.   * bl = 8 - write byte
  3208.   * bl = 9 - write word
  3209.   * bl = 10 - write dword
  3210.   * bh = number of PCI-bus
  3211.   * ch = dddddfff, where ddddd = number of the device on the bus,
  3212.     fff = function number of device
  3213.   * cl = number of register (must be even for bl=9,
  3214.     divisible by 4 for bl=10)
  3215.   * dl/dx/edx (depending on requested size) contatins
  3216.     the data to write
  3217. Returned value:
  3218.   * eax = -1 - error (access to PCI is disabled or parameters
  3219.     are not supported)
  3220.   * eax = 0 - success
  3221. Remarks:
  3222.   * Previously low-level access to PCI for applications must be
  3223.     enabled by subfunction 12 of function 21.
  3224.   * Access mechanism 2 supports only 16 devices on a bus and ignores
  3225.     function number. To get access mechanism use subfunction 2.
  3226.   * Some registers are standard and exist for all devices, some are
  3227.     defined by the concrete device. The list of registers of the
  3228.     first type can be found e.g. in famous Interrupt List by
  3229.     Ralf Brown; registers of the second type must be listed
  3230.     in the device documentation.
  3231.  
  3232. ======================================================================
  3233. ============== Function 63 - work with the debug board. ==============
  3234. ======================================================================
  3235. The debug board is the global system buffer (with the size
  3236. 1024 bytes), to which any program can write (generally speaking,
  3237. arbitrary) data and from which other program can read these data.
  3238. By the agreement written data are text strings interpreted as
  3239. debug messages on a course of program execution. The kernel in
  3240. some situations also writes to the debug board information on
  3241. execution of some functions; by the agreement kernel messages
  3242. begins from the prefix "K : ".
  3243. For view of the debug board the application 'board' was created,
  3244. which reads data from the buffer and displays them in its window.
  3245. 'board' interpretes the sequence of codes 13,10 as newline.
  3246. A character with null code in an end of line is not necessary,
  3247. but also does not prevent.
  3248. Because debugger has been written, the value of the debug board
  3249. has decreased, as debugger allows to inspect completely a course of
  3250. program execution without any efforts from the direction of program
  3251. itself. Nevertheless in some cases the debug board is still useful.
  3252.  
  3253. ----------------------------- Write byte -----------------------------
  3254. Parameters:
  3255.   * eax = 63 - function number
  3256.   * ebx = 1 - subfunction number
  3257.   * cl = data byte
  3258. Returned value:
  3259.   * function does not return value
  3260. Remarks:
  3261.   * Byte is written to the buffer. Buffer size is 512 bytes.
  3262.     At buffer overflow all obtained data are lost.
  3263.   * For output to the debug board of more complicated objects
  3264.     (strings, numbers) it is enough to call this function in cycle.
  3265.     It is possible not to write the appropriate code manually and use
  3266.     file 'debug.inc', which is included into the distributive.
  3267.  
  3268. ----------------------------- Read byte ------------------------------
  3269. Takes away byte from the buffer.
  3270. Parameters:
  3271.   * eax = 63 - function number
  3272.   * ebx = 2 - subfunction number
  3273. Returned value:
  3274.   * eax = ebx = 0 - the buffer is empty
  3275.   * eax = byte, ebx = 1 - byte was successfully read
  3276.  
  3277. ======================================================================
  3278. ============== Function 64 - resize application memory. ==============
  3279. ======================================================================
  3280. Parameters:
  3281.   * eax = 64 - function number
  3282.   * ebx = 1 - unique subfunction
  3283.   * ecx = new memory size
  3284. Returned value:
  3285.   * eax = 0 - success
  3286.   * eax = 1 - not enough memory
  3287. Remarks:
  3288.   * There is another way to dynamically allocate/free memory -
  3289.     subfunctions 11, 12, 13 of function 68.
  3290.   * The function cannot be used together with 68.11, 68.12, 68.13.
  3291.     The function call will be ignored after creation of process heap
  3292.     with function 68.11.
  3293.  
  3294. ======================================================================
  3295. ======== Function 65 - draw image with palette in the window. ========
  3296. ======================================================================
  3297. Parameters:
  3298.   * eax = 65 - function number
  3299.   * ebx = pointer to the image
  3300.   * ecx = [size on axis x]*65536 + [size on axis y]
  3301.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  3302.   * esi = number of bits per pixel, must be 1,2,4,8,15,16,24 or 32
  3303.   * edi = pointer to palette (2 to the power esi colors 0x00RRGGBB);
  3304.           ignored when esi > 8
  3305.   * ebp = offset of next row data relative to previous row data
  3306. Returned value:
  3307.   * function does not return value
  3308. Remarks:
  3309.   * Coordinates of the image are coordinates of the upper left corner
  3310.     of the image relative to the window.
  3311.   * Format of image with 1 bit per pixel: each byte of image
  3312.     (possibly excluding last bytes in rows), contains information on
  3313.     the color of 8 pixels, MSB corresponds to first pixel.
  3314.   * Format of image with 2 bits per pixel: each byte of image
  3315.     (possibly excluding last bytes in rows), contains information on
  3316.     the color of 4 pixels, two MSBs correspond to first pixel.
  3317.   * Format of image with 4 bits per pixel: each byte of image
  3318.     excluding last bytes in rows (if width is odd) contains
  3319.     information on the color of 2 pixels, high-order tetrad
  3320.     corresponds to first pixel.
  3321.   * Format of image with 8 bits per pixel: each byte of image is
  3322.     index in the palette.
  3323.   * Format of image with 15 bits per pixel: the color of each pixel
  3324.     is coded as (bit representation) 0RRRRRGGGGGBBBBB - 5 bits per
  3325.     each color.
  3326.   * Format of image with 16 bits per pixel: the color of each pixel
  3327.     is coded as RRRRRGGGGGGBBBBB (5+6+5).
  3328.   * Format of image with 24 bits per pixel: the color of each pixel
  3329.     is coded as 3 bytes - sequentially blue, green, red components.
  3330.   * Format of image with 32 bits per pixel: similar to 24, but
  3331.     one additional ignored byte is present.
  3332.   * The call to function 7 is equivalent to call to this function
  3333.     with esi=24, ebp=0.
  3334.  
  3335. ======================================================================
  3336. ================== Function 66 - work with keyboard. =================
  3337. ======================================================================
  3338. The input mode influences results of reading keys by function 2.
  3339. When a program loads, ASCII input mode is set for it.
  3340.  
  3341. -------------- Subfunction 1 - set keyboard input mode. --------------
  3342. Parameters:
  3343.   * eax = 66 - function number
  3344.   * ebx = 1 - subfunction number
  3345.   * ecx = mode:
  3346.     * 0 = normal (ASCII-characters)
  3347.     * 1 = scancodes
  3348. Returned value:
  3349.   * function does not return value
  3350.  
  3351. -------------- Subfunction 2 - get keyboard input mode. --------------
  3352. Parameters:
  3353.   * eax = 66 - function number
  3354.   * ebx = 2 - subfunction number
  3355. Returned value:
  3356.   * eax = current mode
  3357.  
  3358. ------------ Subfunction 3 - get status of control keys. -------------
  3359. Parameters:
  3360.   * eax = 66 - function number
  3361.   * ebx = 3 - subfunction number
  3362. Returned value:
  3363.   * eax = bit mask:
  3364.   * bit 0 (mask 1): left Shift is pressed
  3365.   * bit 1 (mask 2): right Shift is pressed
  3366.   * bit 2 (mask 4): left Ctrl is pressed
  3367.   * bit 3 (mask 8): right Ctrl is pressed
  3368.   * bit 4 (mask 0x10): left Alt is pressed
  3369.   * bit 5 (mask 0x20): right Alt is pressed
  3370.   * bit 6 (mask 0x40): CapsLock is on
  3371.   * bit 7 (mask 0x80): NumLock is on
  3372.   * bit 8 (mask 0x100): ScrollLock is on
  3373.   * other bits are cleared
  3374.  
  3375. -------------- Subfunction 4 - set system-wide hotkey. ---------------
  3376. When hotkey is pressed, the system notifies only those applications,
  3377. which have installed it; the active application (which receives
  3378. all normal input) does not receive such keys.
  3379. The notification consists in sending event with the code 2.
  3380. Reading hotkey is the same as reading normal key - by function 2.
  3381. Parameters:
  3382.   * eax = 66 - function number
  3383.   * ebx = 4 - subfunction number
  3384.   * cl determines key scancode;
  3385.     use cl=0 to give combinations such as Ctrl+Shift
  3386.   * edx = 0xXYZ determines possible states of control keys:
  3387.     * Z (low 4 bits) determines state of LShift and RShift:
  3388.       * 0 = no key must be pressed;
  3389.       * 1 = exactly one key must be pressed;
  3390.       * 2 = both keys must be pressed;
  3391.       * 3 = must be pressed LShift, but not RShift;
  3392.       * 4 = must be pressed RShift, but not LShift
  3393.     * Y - similar for LCtrl and RCtrl;
  3394.     * X - similar for LAlt and RAlt
  3395. Returned value:
  3396.   * eax=0 - success
  3397.   * eax=1 - too mant hotkeys (maximum 256 are allowed)
  3398. Remarks:
  3399.   * Hotkey can work either at pressing or at release. Release
  3400.     scancode of a key is more on 128 than pressing scancode
  3401.     (i.e. high bit is set).
  3402.   * Several applications can set the same combination;
  3403.     all such applications will be informed on pressing
  3404.     such combination.
  3405.  
  3406. -------------- Subfunction 5 - delete installed hotkey. --------------
  3407. Parameters:
  3408.   * eax = 66 - function number
  3409.   * ebx = 5 - subfunction number
  3410.   * cl = scancode of key and edx = 0xXYZ the same as in subfunction 4
  3411. Returned value:
  3412.   * eax = 0 - success
  3413.   * eax = 1 - there is no such hotkey
  3414. Remarks:
  3415.   * When a process/thread terminates, all hotkey installed by it are
  3416.     deleted.
  3417.   * The call to this subfunction does not affect other applications.
  3418.     If other application has defined the same combination, it will
  3419.     still receive notices.
  3420.  
  3421. ======================================================================
  3422. ========= Function 67 - change position/sizes of the window. =========
  3423. ======================================================================
  3424. Parameters:
  3425.   * eax = 67 - function number
  3426.   * ebx = new x-coordinate of the window
  3427.   * ecx = new y-coordinate of the window
  3428.   * edx = new x-size of the window
  3429.   * esi = new y-size of the window
  3430. Returned value:
  3431.   * function does not return value
  3432. Remarks:
  3433.   * The value -1 for a parameter means "do not change"; e.g. to move
  3434.     the window without resizing it is possible to specify edx=esi=-1.
  3435.   * Previously the window must be defined by function 0.
  3436.     It sets initial coordinates and sizes of the window.
  3437.   * Sizes of the window are understood in sense of function 0,
  3438.     that is one pixel less than real sizes.
  3439.   * The function call for maximized windows is simply ignored.
  3440.   * For windows of appropriate styles position and/or sizes can be
  3441.     changed by user; current position and sizes can be obtained by
  3442.     call to function 9.
  3443.   * The function sends to the window redraw event (with the code 1).
  3444.  
  3445. ======================================================================
  3446. ====== Function 68, subfunction 0 - get the task switch counter. =====
  3447. ======================================================================
  3448. Parameters:
  3449.   * eax = 68 - function number
  3450.   * ebx = 0 - subfunction number
  3451. Returned value:
  3452.   * eax = number of task switches from the system booting
  3453.     (modulo 2^32)
  3454.  
  3455. ======================================================================
  3456. ======= Function 68, subfunction 1 - switch to the next thread. ======
  3457. ======================================================================
  3458. The function completes the current time slice allocated to the
  3459. thread and switches to the next. (Which thread in which process
  3460. will be next, is unpredictable). Later, when execution queue
  3461. will reach the current thread, execution will be continued.
  3462. Parameters:
  3463.   * eax = 68 - function number
  3464.   * ebx = 1 - subfunction number
  3465. Returned value:
  3466.   * function does not return value
  3467.  
  3468. ======================================================================
  3469. ============= Function 68, subfunction 2 - cache + rdpmc. ============
  3470. ======================================================================
  3471. Parameters:
  3472.   * eax = 68 - function number
  3473.   * ebx = 2 - subfunction number
  3474.   * ecx = required action:
  3475.     * ecx = 0 - enable instruction 'rdpmc'
  3476.       (ReaD Performance-Monitoring Counters) for applications
  3477.     * ecx = 1 - find out whether cache is disabled/enabled
  3478.     * ecx = 2 - enable cache
  3479.     * ecx = 3 - disable cache
  3480. Returned value:
  3481.   * for ecx=0:
  3482.     * eax = the value of cr4
  3483.   * for ecx=1:
  3484.     * eax = (cr0 and 0x60000000):
  3485.     * eax = 0 - cache is on
  3486.     * eax <> 0 - cache is off
  3487.   * for ecx=2 and ecx=3:
  3488.     * function does not return value
  3489.  
  3490. ======================================================================
  3491. =========== Function 68, subfunction 3 - read MSR-register. ==========
  3492. ======================================================================
  3493. MSR = Model Specific Register; the complete list of MSR-registers
  3494. of a processor is included to the documentation on it (for example,
  3495. IA-32 Intel Architecture Software Developer's Manual,
  3496. Volume 3, Appendix B); each processor family has its own subset
  3497. of the MSR-registers.
  3498. Parameters:
  3499.   * eax = 68 - function number
  3500.   * ebx = 3 - subfunction number
  3501.   * ecx is ignored
  3502.   * edx = MSR address
  3503. Returned value:
  3504.   * ebx:eax = high:low dword of the result
  3505. Remarks:
  3506.   * If ecx contains nonexistent or not implemented for this processor
  3507.     MSR, processor will generate an exception in the kernel, which
  3508.     will kill the thread.
  3509.   * Previously it is necessary to check, whether MSRs are supported
  3510.     as a whole, with the instruction 'cpuid'. Otherwise processor
  3511.     will generate other exception in the kernel, which will anyway
  3512.     kill the thread.
  3513.  
  3514. ======================================================================
  3515. ========= Function 68, subfunction 4 - write to MSR-register. ========
  3516. ======================================================================
  3517. MSR = Model Specific Register; the complete list of MSR-registers
  3518. of a processor is included to the documentation on it (for example,
  3519. IA-32 Intel Architecture Software Developer's Manual,
  3520. Volume 3, Appendix B); each processor family has its own subset
  3521. of the MSR-registers.
  3522. Parameters:
  3523.   * eax = 68 - function number
  3524.   * ebx = 4 - subfunction number
  3525.   * ecx is ignored
  3526.   * edx = MSR address
  3527.   * esi:edi = high:low dword
  3528. Returned value:
  3529.   * function does not return value
  3530. Remarks:
  3531.   * If ecx contains nonexistent or not implemented for this processor
  3532.     MSR, processor will generate an exception in the kernel, which
  3533.     will kill the thread.
  3534.   * Previously it is necessary to check, whether MSRs are supported
  3535.     as a whole, with the instruction 'cpuid'. Otherwise processor
  3536.     will generate other exception in the kernel, which will anyway
  3537.     kill the thread.
  3538.  
  3539. ======================================================================
  3540. ======= Function 68, subfunction 11 - initialize process heap. =======
  3541. ======================================================================
  3542. Parameters:
  3543.   * eax = 68 - function number
  3544.   * ebx = 11 - subfunction number
  3545. Returned value:
  3546.   * eax = 0 - failed
  3547.   * otherwise size of created heap
  3548. Remarks:
  3549.   * The function call initializes heap, from which one can in future
  3550.     allocate and free memory blocks with subfunctions 12 and 13.
  3551.     Heap size is equal to total amount of free application memory.
  3552.   * The second function call from the same process results in
  3553.     returning the size of the existing heap.
  3554.   * After creation of the heap calls to function 64 will be ignored.
  3555.  
  3556. ======================================================================
  3557. ======== Function 68, subfunction 12 - allocate memory block. ========
  3558. ======================================================================
  3559. Parameters:
  3560.   * eax = 68 - function number
  3561.   * ebx = 12 - subfunction number
  3562.   * ecx = required size in bytes
  3563. Returned value:
  3564.   * eax = pointer to the allocated block
  3565. Remarks:
  3566.   * Before this call one must initialize process heap by call to
  3567.     subfunction 11.
  3568.   * The function allocates an integer number of pages (4 Kb) in such
  3569.     way that the real size of allocated block is more than or equal to
  3570.     requested size.
  3571.  
  3572. ======================================================================
  3573. ========== Function 68, subfunction 13 - free memory block. ==========
  3574. ======================================================================
  3575. Parameters:
  3576.   * eax = 68 - function number
  3577.   * ebx = 13 - subfunction number
  3578.   * ecx = pointer to the memory block
  3579. Returned value:
  3580.   * eax = 1 - success
  3581.   * eax = 0 - failed
  3582. Remarks:
  3583.   * The memory block must have been allocated by subfunction 12
  3584.     or subfunction 20.
  3585.  
  3586. ======================================================================
  3587. ===================== Function 68, subfunction 14 ====================
  3588. ============ Wait for signal from another program/driver. ============
  3589. ======================================================================
  3590. Parameters:
  3591.   * eax = 68 - function number
  3592.   * ebx = 14 - subfunction number
  3593.   * ecx = pointer to the buffer for information (24 bytes)
  3594. Returned value:
  3595.   * buffer pointed to by ecx contains the following information:
  3596.     * +0: dword: identifier for following data of signal
  3597.     * +4: dword: data of signal (20 bytes), format of which is defined
  3598.           by the first dword
  3599.  
  3600. ======================================================================
  3601. ============= Function 68, subfunction 16 - load driver. =============
  3602. ======================================================================
  3603. Parameters:
  3604.   * eax = 68 - function number
  3605.   * ebx = 16 - subfunction number
  3606.   * ecx = pointer to ASCIIZ-string with driver name
  3607. Returned value:
  3608.   * eax = 0 - failed
  3609.   * otherwise eax = driver handle
  3610. Remarks:
  3611.   * If the driver was not loaded yet, it is loaded;
  3612.     if the driver was loaded yet, nothing happens.
  3613.   * Driver name is case-sensitive.
  3614.     Maximum length of the name is 16 characters, including
  3615.     terminating null character, the rest is ignored.
  3616.   * Driver ABC is loaded from file /rd/1/drivers/ABC.obj.
  3617.  
  3618. ======================================================================
  3619. ============ Function 68, subfunction 17 - driver control. ===========
  3620. ======================================================================
  3621. Parameters:
  3622.   * eax = 68 - function number
  3623.   * ebx = 17 - subfunction number
  3624.   * ecx = pointer to the control structure:
  3625.     * +0: dword: handle of driver
  3626.     * +4: dword: code of driver function
  3627.     * +8: dword: pointer to input data
  3628.     * +12 = +0xC: dword: size of input data
  3629.     * +16 = +0x10: dword: pointer to output data
  3630.     * +20 = +0x14: dword: size of output data
  3631. Returned value:
  3632.   * eax = determined by driver
  3633. Remarks:
  3634.   * Function codes and the structure of input/output data
  3635.     are defined by driver.
  3636.   * Previously one must obtain driver handle by subfunction 16.
  3637.  
  3638. ======================================================================
  3639. =============== Function 68, subfunction 19 - load DLL. ==============
  3640. ======================================================================
  3641. Parameters:
  3642.   * eax = 68 - function number
  3643.   * ebx = 19 - subfunction number
  3644.   * ecx = pointer to ASCIIZ-string with the full path to DLL
  3645. Returned value:
  3646.   * eax = 0 - failed
  3647.   * otherwise eax = pointer to DLL export table
  3648. Remarks:
  3649.   * Export table is an array of structures of 2 dword's, terminated
  3650.     by zero. The first dword in structure points to function name,
  3651.     the second dword contains address of function.
  3652.  
  3653. ======================================================================
  3654. ======= Function 68, subfunction 20 - reallocate memory block. =======
  3655. ======================================================================
  3656. Parameters:
  3657.   * eax = 68 - function number
  3658.   * ebx = 20 - subfunction number
  3659.   * ecx = new size in bytes
  3660.   * edx = pointer to already allocated block
  3661. Returned value:
  3662.   * eax = pointer to the reallocated block, 0 = error
  3663. Remarks:
  3664.   * Before this call one must initialize process heap by call to
  3665.     subfunction 11.
  3666.   * The function allocates an integer number of pages (4 Kb) in such
  3667.     way that the real size of allocated block is more than or equal to
  3668.     requested size.
  3669.   * If edx=0, the function call is equivalent to memory allocation
  3670.     with subfunction 12. Otherwise the block at edx
  3671.     must be allocated earlier with subfunction 12 or this subfunction.
  3672.   * If ecx=0, the function frees memory block at edx and returns 0.
  3673.   * The contents of the block are unchanged up to the shorter of
  3674.     the new and old sizes.
  3675.  
  3676. ======================================================================
  3677. =========== Function 68, subfunction 21 - load driver PE. ============
  3678. ======================================================================
  3679. Parameters:
  3680.   * eax = 68 - function number
  3681.   * ebx = 21 - subfunction number
  3682.   * ecx = pointer to ASCIIZ-string with driver name
  3683.   * edx = pointer to command line
  3684. Returned value:
  3685.   * eax = 0 - failed
  3686.   * otherwise eax = driver handle
  3687. Remarks:
  3688.   * If the driver was not loaded yet, it is loaded;
  3689.     if the driver was loaded yet, nothing happens.
  3690.  
  3691. ======================================================================
  3692. ======== Function 68, subfunction 22 - open named memory area. =======
  3693. ======================================================================
  3694. Parameters:
  3695.   * eax = 68 - function number
  3696.   * ebx = 22 - subfunction number
  3697.   * ecx = area name. Maximum of 31 characters with terminating zero
  3698.   * edx = area size in bytes for SHM_CREATE and SHM_OPEN_ALWAYS
  3699.   * esi = flags for open and access:
  3700.     * SHM_OPEN        = 0x00 - open existing memory area. If an area
  3701.                           with such name does not exist, the function
  3702.                           will return error code 5.
  3703.     * SHM_OPEN_ALWAYS = 0x04 - open existing or create new
  3704.                           memory area.
  3705.     * SHM_CREATE      = 0x08 - create new memory area. If an area
  3706.                           with such name already exists, the function
  3707.                           will return error code 10.
  3708.     * SHM_READ        = 0x00 - only read access
  3709.     * SHM_WRITE       = 0x01 - read and write access
  3710. Returned value:
  3711.   * eax = pointer to memory area, 0 if error has occured
  3712.   * if new area is created (SHM_CREATE or SHM_OPEN_ALWAYS):
  3713.     edx = 0 - success, otherwise - error code
  3714.   * if existing area is opened (SHM_OPEN or SHM_OPEN_ALWAYS):
  3715.     edx = error code (if eax=0) or area size in bytes
  3716. Error codes:
  3717.   * E_NOTFOUND = 5
  3718.   * E_ACCESS = 10
  3719.   * E_NOMEM = 30
  3720.   * E_PARAM = 33
  3721. Remarks:
  3722.   * Before this call one must initialize process heap by call to
  3723.     subfunction 11.
  3724.   * If a new area is created, access flags set maximal rights
  3725.     for other processes. An attempt from other process to open
  3726.     with denied rights will fail with error code E_ACCESS.
  3727.   * The process which has created an area always has write access.
  3728.  
  3729. ======================================================================
  3730. ======= Function 68, subfunction 23 - close named memory area. =======
  3731. ======================================================================
  3732. Parameters:
  3733.   * eax = 68 - function number
  3734.   * ebx = 23 - subfunction number
  3735.   * ecx = area name. Maximum of 31 characters with terminating zero
  3736. Returned value:
  3737.   * eax destroyed
  3738. Remarks:
  3739.   * A memory area is physically freed (with deleting all data and
  3740.     freeing physical memory), when all threads which have opened
  3741.     this area will close it.
  3742.   * When thread is terminating, all opened by it areas are closed.
  3743.  
  3744. ======================================================================
  3745. ======== Function 68, subfunction 24 - set exception handler. ========
  3746. ======================================================================
  3747. Parameters:
  3748.   * eax = 68 - function number
  3749.   * ebx = 24 - subfunction number
  3750.   * ecx = address of the new exception handler
  3751.   * edx = the mask of handled exceptions
  3752. Returned value:
  3753.   * eax = address of the old exception handler (0, if it was not set)
  3754.   * ebx = the old mask of handled exceptions
  3755. Remarks:
  3756.   * Bit number in mask of exceptions corresponds to exception number
  3757.     in CPU-specification (Intel-PC). For example, FPU exceptions have
  3758.     number 16 (#MF), and SSE exceptions - 19 (#XF).
  3759.   * The current implementation ignores the inquiry for hook of 7
  3760.     exception - the system handles #NM by its own.
  3761.   * The exception handler is called with exception number as first
  3762.     (and only) stack parameter. So, correct exit from the handler is
  3763.     RET 4. It returns to the instruction, that caused the exception,
  3764.     for faults, and to the next instruction for traps (see
  3765.     classification of exceptions in CPU specification).
  3766.   * When user handler receives control, the corresponding bit in
  3767.     the exception mask is cleared. Raising this exception
  3768.     in consequence leads to default handling, that is,
  3769.     terminating the application in absence of debugger or
  3770.     suspend with notification of debugger otherwise.
  3771.   * After user handler completes critical operations, it can set
  3772.     the corresponding bit in the exception mask with subfunction 25.
  3773.     Also user handler is responsible for clearing exceptions flags in
  3774.     FPU and/or SSE.
  3775.  
  3776. ======================================================================
  3777. ====== Function 68, subfunction 25 - set FPU exception handler. ======
  3778. ======================================================================
  3779. Parameters:
  3780.   * eax = 68 - function number
  3781.   * ebx = 25 - subfunction number
  3782.   * ecx = signal number
  3783.   * edx = value of activity (0/1)
  3784. Returned value:
  3785.   * eax = -1 - invalid signal number
  3786.   * otherwise eax = old value of activity for this signal (0/1)
  3787. Remarks:
  3788.   * In current implementation only mask for user excepton handler,
  3789.     which has been previously set by subfunction 24,
  3790.     is changed. Signal number corresponds to exception number.
  3791.  
  3792. ======================================================================
  3793. ====================== Function 69 - debugging. ======================
  3794. ======================================================================
  3795. A process can load other process as debugged by set of corresponding
  3796. bit by call to subfunction 7 of function 70.
  3797. A process can have only one debugger; one process can debug some
  3798. others. The system notifies debugger on events occuring with
  3799. debugged process. Messages are written to the buffer defined by
  3800. subfunction 0.
  3801. Format of a message:
  3802.   * +0: dword: message code
  3803.   * +4: dword: PID of debugged process
  3804.   * +8: there can be additional data depending on message code
  3805. Message codes:
  3806.   * 1 = exception
  3807.     * in addition dword-number of the exception is given
  3808.     * process is suspended
  3809.   * 2 = process has terminated
  3810.     * comes at any termination: both through the system function -1,
  3811.       and at "murder" by any other process (including debugger itself)
  3812.   * 3 = debug exception int 1 = #DB
  3813.     * in addition dword-image of the register DR6 is given:
  3814.       * bits 0-3: condition of the corresponding breakpoint (set by
  3815.         subfunction 9) is satisfied
  3816.       * áèò 14: exception has occured because of the trace mode
  3817.         (flag TF is set TF)
  3818.     * process is suspended
  3819. When debugger terminates, all debugged processes are killed.
  3820. If debugger does not want this, it must previously detach by
  3821. subfunction 3.
  3822.  
  3823. All subfunctions are applicable only to processes/threads started
  3824. from the current by function 70 with set debugging flag.
  3825. Debugging of multithreaded programs is not supported yet.
  3826. The full list of subfunctions:
  3827.   * subfunction 0 - define data area for debug messages
  3828.   * subfunction 1 - get contents of registers of debugged thread
  3829.   * subfunction 2 - set contents of registers of debugged thread
  3830.   * subfunction 3 - detach from debugged process
  3831.   * subfunction 4 - suspend debugged thread
  3832.   * subfunction 5 - resume debugged thread
  3833.   * subfunction 6 - read from the memory of debugged process
  3834.   * subfunction 7 - write to the memory of debugged process
  3835.   * subfunction 8 - terminate debugged thread
  3836.   * subfunction 9 - set/clear hardware breakpoint
  3837.  
  3838. ======================================================================
  3839. = Function 69, subfunction 0 - define data area fror debug messages. =
  3840. ======================================================================
  3841. Parameters:
  3842.   * eax = 69 - function number
  3843.   * ebx = 0 - subfunction number
  3844.   * ecx = pointer
  3845. Format of data area:
  3846.   * +0: dword: N = buffer size (not including this header)
  3847.   * +4: dword: occupied place
  3848.   * +8: N*byte: buffer
  3849. Returned value:
  3850.   * function does not return value
  3851. Remarks:
  3852.   * If the size field is negative, the buffer is considered locked
  3853.     and at arrival of new message the system will wait.
  3854.     For synchronization frame all work with the buffer by operations
  3855.     lock/unlock
  3856.         neg     [bufsize]
  3857.   * Data in the buffer are considered as array of items with variable
  3858.     length - messages. Format of a message is explained in
  3859.     general description.
  3860.  
  3861. ======================================================================
  3862. ===================== Function 69, subfunction 1 =====================
  3863. ============ Get contents of registers of debugged thread. ===========
  3864. ======================================================================
  3865. Parameters:
  3866.   * eax = 69 - function number
  3867.   * ebx = 1 - subfunction number
  3868.   * ecx = thread identifier
  3869.   * edx = size of context structure, must be 0x28=40 bytes
  3870.   * esi = pointer to context structure
  3871. Returned value:
  3872.   * function does not return value
  3873. Format of context structure: (FPU is not supported yet)
  3874.   * +0: dword: eip
  3875.   * +4: dword: eflags
  3876.   * +8: dword: eax
  3877.   * +12 = +0xC: dword: ecx
  3878.   * +16 = +0x10: dword: edx
  3879.   * +20 = +0x14: dword: ebx
  3880.   * +24 = +0x18: dword: esp
  3881.   * +28 = +0x1C: dword: ebp
  3882.   * +32 = +0x20: dword: esi
  3883.   * +36 = +0x24: dword: edi
  3884. Remarks:
  3885.   * If the thread executes code of ring-0, the function returns
  3886.     contents of registers of ring-3.
  3887.   * Process must be loaded for debugging (as is shown in
  3888.     general description).
  3889.  
  3890. ======================================================================
  3891. ===================== Function 69, subfunction 2 =====================
  3892. ============ Set contents of registers of debugged thread. ===========
  3893. ======================================================================
  3894. Parameters:
  3895.   * eax = 69 - function number
  3896.   * ebx = 2 - subfunction number
  3897.   * ecx = thread identifier
  3898.   * edx = size of context structure, must be 0x28=40 bytes
  3899. Returned value:
  3900.   * function does not return value
  3901. Format of context structure is shown in the description of
  3902. subfunction 1.
  3903. Remarks:
  3904.   * If the thread executes code of ring-0, the function returns
  3905.     contents of registers of ring-3.
  3906.   * Process must be loaded for debugging (as is shown in
  3907.     general description).
  3908.  
  3909. ======================================================================
  3910. ===== Function 69, subfunction 3 - detach from debugged process. =====
  3911. ======================================================================
  3912. Parameters:
  3913.   * eax = 69 - function number
  3914.   * ebx = 3 - subfunction number
  3915.   * ecx = identifier
  3916. Returned value:
  3917.   * function does not return value
  3918. Remarks:
  3919.   * If the process was suspended, it resumes execution.
  3920.  
  3921. ======================================================================
  3922. ======== Function 69, subfunction 4 - suspend debugged thread. =======
  3923. ======================================================================
  3924. Parameters:
  3925.   * eax = 69 - function number
  3926.   * ebx = 4 - subfunction number
  3927.   * ecx = thread identifier
  3928. Returned value:
  3929.   * function does not return value
  3930. Remarks:
  3931.   * Process must be loaded for debugging (as is shown in
  3932.     general description).
  3933.  
  3934. ======================================================================
  3935. ======== Function 69, subfunction 5 - resume debugged thread. ========
  3936. ======================================================================
  3937. Parameters:
  3938.   * eax = 69 - function number
  3939.   * ebx = 5 - subfunction number
  3940.   * ecx = thread identifier
  3941. Returned value:
  3942.   * function does not return value
  3943. Remarks:
  3944.   * Process must be loaded for debugging (as is shown in
  3945.     general description).
  3946.  
  3947. ======================================================================
  3948. = Fucntion 69, subfunction 6 - read from memory of debugged process. =
  3949. ======================================================================
  3950. Parameters:
  3951.   * eax = 69 - function number
  3952.   * ebx = 6 - subfunction number
  3953.   * ecx = identifier
  3954.   * edx = number of bytes to read
  3955.   * esi = address in the memory of debugged process
  3956.   * edi = pointer to buffer for data
  3957. Returned value:
  3958.   * eax = -1 at an error (invalid PID or buffer)
  3959.   * otherwise eax = number of read bytes (possibly, 0,
  3960.     if esi is too large)
  3961. Remarks:
  3962.   * Process must be loaded for debugging (as is shown in
  3963.     general description).
  3964.  
  3965. ======================================================================
  3966. == Function 69, subfunction 7 - write to memory of debugged process. =
  3967. ======================================================================
  3968. Parameters:
  3969.   * eax = 69 - function number
  3970.   * ebx = 7 - subfunction number
  3971.   * ecx = identifier
  3972.   * edx = number of bytes to write
  3973.   * esi = address of memory in debugged process
  3974.   * edi = pointer to data
  3975. Returned value:
  3976.   * eax = -1 at an error (invalid PID or buffer)
  3977.   * otherwise eax = number of written bytes (possibly, 0,
  3978.     if esi is too large)
  3979. Remarks:
  3980.   * Process must be loaded for debugging (as is shown in
  3981.     general description).
  3982.  
  3983. ======================================================================
  3984. ======= Function 69, subfunction 8 - terminate debugged thread. ======
  3985. ======================================================================
  3986. Parameters:
  3987.   * eax = 69 - function number
  3988.   * ebx = 8 - subfunction number
  3989.   * ecx = identifier
  3990. Returned value:
  3991.   * function does not return value
  3992. Remarks:
  3993.   * Process must be loaded for debugging (as is shown in
  3994.     general description).
  3995.   * The function is similar to subfunction 2 of function 18
  3996.     with two differences: it requires first remark and
  3997.     accepts PID rather than slot number.
  3998.  
  3999. ======================================================================
  4000. ===== Function 69, subfunction 9 - set/clear hardware breakpoint. ====
  4001. ======================================================================
  4002. Parameters:
  4003.   * eax = 69 - function number
  4004.   * ebx = 9 - subfunction number
  4005.   * ecx = thread identifier
  4006.   * dl = index of breakpoint, from 0 to 3 inclusively
  4007.   * dh = flags:
  4008.     * if high bit is cleared - set breakpoint:
  4009.       * bits 0-1 - condition:
  4010.         * 00 = breakpoint on execution
  4011.         * 01 = breakpoint on read
  4012.         * 11 = breakpoint on read/write
  4013.       * bits 2-3 - length; for breakpoints on exception it must be
  4014.         00, otherwise one of
  4015.         * 00 = byte
  4016.         * 01 = word
  4017.         * 11 = dword
  4018.       * esi = breakpoint address; must be aligned according to
  4019.         the length (i.e. must be even for word breakpoints,
  4020.         divisible by 4 for dword)
  4021.     * if high bit is set - clear breakpoint
  4022. Returned value:
  4023.   * eax = 0 - success
  4024.   * eax = 1 - error in the input data
  4025.   * eax = 2 - (reserved, is never returned in the current
  4026.     implementation) a global breakpoint with that index is already set
  4027. Remarks:
  4028.   * Process must be loaded for debugging (as is shown in
  4029.     general description).
  4030.   * Hardware breakpoints are implemented through DRx-registers of
  4031.     the processor, all limitations results from this.
  4032.   * The function can reinstall the breakpoint, previously set
  4033.     by it (and it does not inform on this).
  4034.     Carry on the list of set breakpoints in the debugger.
  4035.   * Breakpoints generate debug exception #DB, on which the system
  4036.     notifies debugger.
  4037.   * Breakpoints on write and read/write act after
  4038.     execution of the caused it instruction.
  4039.  
  4040. ======================================================================
  4041. ==== Function 70 - work with file system with long names support. ====
  4042. ======================================================================
  4043. Parameters:
  4044.   * eax = 70
  4045.   * ebx = pointer to the information structure
  4046. Returned value:
  4047.   * eax = 0 - success; otherwise file system error code
  4048.   * some subfunctions return value in other registers too
  4049. General format of the information structure:
  4050.   * +0: dword: subfunction number
  4051.   * +4: dword: file offset
  4052.   * +8: dword: high dword of offset (must be 0) or flags field
  4053.   * +12 = +0xC: dword: size
  4054.   * +16 = +0x10: dword: pointer to data
  4055.   * +20 = +0x14: n db: ASCIIZ-string with the filename
  4056.     or
  4057.   * +20 = +0x14: db 0
  4058.   * +21 = +0x15: dd pointer to ASCIIZ-string with the filename
  4059. Specifications - in documentation on the appropriate subfunction.
  4060. Filename is case-insensitive. Russian letters must be written in
  4061. the encoding cp866 (DOS).
  4062. Format of filename:
  4063. /base/number/dir1/dir2/.../dirn/file,
  4064. where /base/number identifies device, on which file is located:
  4065. one of
  4066.   * /RD/1 = /RAMDISK/1 to access ramdisk
  4067.   * /FD/1 = /FLOPPYDISK/1 to access first floppy drive,
  4068.     /FD/2 = /FLOPPYDISK/2 to access second one
  4069.   * /HD0/x, /HD1/x, /HD2/x, /HD3/x to access accordingly to devices
  4070.     IDE0 (Primary Master), IDE1 (Primary Slave),
  4071.     IDE2 (Secondary Master), IDE3 (Secondary Slave);
  4072.     x - partition number on the selected hard drive, varies from 1
  4073.     to 255 (on each hard drive the indexing starts from 1)
  4074.   * /CD0/1, /CD1/1, /CD2/1, /CD3/1 to access accordingly to
  4075.     CD on IDE0 (Primary Master), IDE1 (Primary Slave),
  4076.     IDE2 (Secondary Master), IDE3 (Secondary Slave)
  4077.   * /SYS means system folder; with the usual boot (from floppy)
  4078.     is equivalent to /RD/1
  4079. Examples:
  4080.   * '/rd/1/kernel.asm',0
  4081.   * '/HD0/1/kernel.asm',0
  4082.   * '/hd0/2/menuet/pics/tanzania.bmp',0
  4083.   * '/hd0/1/Program files/NameOfProgram/SomeFile.SomeExtension',0
  4084.   * '/sys/MySuperApp.ini',0
  4085. Also function supports relative names.  If the path begins not
  4086. with '/', it is considered relative to a current folder. To get or
  4087. set a current folder, use the function 30.
  4088.  
  4089. Available subfunctions:
  4090.   * subfunction 0 - read file
  4091.   * subfunction 1 - read folder
  4092.   * subfunction 2 - create/rewrite file
  4093.   * subfunction 3 - write to existing file
  4094.   * subfunction 4 - set file size
  4095.   * subfunction 5 - get attributes of file/folder
  4096.   * subfunction 6 - set attributes of file/folder
  4097.   * subfunction 7 - start application
  4098.   * subfunction 8 - delete file/folder
  4099.   * subfunction 9 - create folder
  4100. For CD-drives due to hardware limitations only subfunctions
  4101. 0,1,5 and 7 are available, other subfunctions return error
  4102. with code 2.
  4103. At the first call of subfunctions 0,1,5,7 to ATAPI devices
  4104. (CD and DVD) the manual control of tray is locked due to caching
  4105. drive data. Unlocking is made when subfunction 4 of function 24
  4106. is called for corresponding device.
  4107.  
  4108. ======================================================================
  4109. === Function 70, subfunction 0 - read file with long names support. ==
  4110. ======================================================================
  4111. Parameters:
  4112.   * eax = 70 - function number
  4113.   * ebx = pointer to the information structure
  4114. Format of the information structure:
  4115.   * +0: dword: 0 = subfunction number
  4116.   * +4: dword: file offset (in bytes)
  4117.   * +8: dword: 0 (reserved for high dword of offset)
  4118.   * +12 = +0xC: dword: number of bytes to read
  4119.   * +16 = +0x10: dword: pointer to buffer for data
  4120.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4121.     given in the general description
  4122.     or
  4123.   * +20 = +0x14: db 0
  4124.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4125. Returned value:
  4126.   * eax = 0 - success, otherwise file system error code
  4127.   * ebx = number of read bytes or -1=0xffffffff if file was not found
  4128. Remarks:
  4129.   * If file was ended before last requested block was read,
  4130.     the function will read as many as it can, and after that return
  4131.     eax=6 (EOF).
  4132.   * The function does not allow to read folder (returns eax=10,
  4133.     access denied).
  4134.  
  4135. ======================================================================
  4136. == Function 70, subfunction 1 - read folder with long names support. =
  4137. ======================================================================
  4138. Parameters:
  4139.   * eax = 70 - function number
  4140.   * ebx = pointer to the information structure
  4141. Format of the information structure:
  4142.   * +0: dword: 1 = subfunction number
  4143.   * +4: dword: index of starting block (beginning from 0)
  4144.   * +8: dword: flags field:
  4145.     * bit 0 (mask 1): in what format to return names,
  4146.       0=ANSI, 1=UNICODE
  4147.     * other bits are reserved and must be set to 0 for the future
  4148.       compatibility
  4149.   * +12 = +0xC: dword: number of blocks to read
  4150.   * +16 = +0x10: dword: pointer to buffer for data, buffer size
  4151.     must be not less than 32 + [+12]*560 bytes
  4152.   * +20 = +0x14: ASCIIZ-name of folder, the rules of names forming are
  4153.     given in the general description
  4154.     or
  4155.   * +20 = +0x14: db 0
  4156.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4157. Returned value:
  4158.   * eax = 0 - success, otherwise file system error code
  4159.   * ebx = number of files, information on which was written to
  4160.     the buffer, or -1=0xffffffff, if folder was not found
  4161. Structure of the buffer:
  4162.   * +0: 32*byte: header
  4163.   * +32 = +0x20: n1*byte: block with information on file 1
  4164.   * +32+n1: n2*byte: block with information on file 2
  4165.   * ...
  4166. Structure of header:
  4167.   * +0: dword: version of structure (current is 1)
  4168.   * +4: dword: number of placed blocks; is not greater than requested
  4169.     in the field +12 of information structure; can be less, if
  4170.     there are no more files in folder (the same as in ebx)
  4171.   * +8: dword: total number of files in folder
  4172.   * +12 = +0xC: 20*byte: reserved (zeroed)
  4173. Structure of block of data for folder entry (BDFE):
  4174.   * +0: dword: attributes of file:
  4175.     * bit 0 (mask 1): file is read-only
  4176.     * bit 1 (mask 2): file is hidden
  4177.     * bit 2 (mask 4): file is system
  4178.     * bit 3 (mask 8): this is not a file but volume label
  4179.       (for one partition meets no more than once and
  4180.       only in root folder)
  4181.     * bit 4 (mask 0x10): this is a folder
  4182.     * bit 5 (mask 0x20): file was not archived - many archivation
  4183.       programs have an option to archive only files with this bit set,
  4184.       and after archiving this bit is cleared - it can be useful
  4185.       for automatically creating of backup-archives as at writing
  4186.       this bit is usually set
  4187.   * +4: byte: type of name data:
  4188.     (coincides with bit 0 of flags in the information structure)
  4189.     * 0 = ASCII = 1-byte representation of each character
  4190.     * 1 = UNICODE = 2-byte representation of each character
  4191.   * +5: 3*byte: reserved (zero)
  4192.   * +8: 4*byte: time of file creation
  4193.   * +12 = +0xC: 4*byte: date of file creation
  4194.   * +16 = +0x10: 4*byte: time of last access (read or write)
  4195.   * +20 = +0x14: 4*byte: date of last access
  4196.   * +24 = +0x18: 4*byte: time of last modification
  4197.   * +28 = +0x1C: 4*byte: date of last modification
  4198.   * +32 = +0x20: qword: file size in bytes (up to 16777216 Tb)
  4199.   * +40 = +0x28: name
  4200.     * for ASCII format: maximum length is 263 characters
  4201.       (263 bytes), byte after the name has value 0
  4202.     * for UNICODE format: maximum length is 259 characters
  4203.       (518 bytes), 2 bytes after the name have value 0
  4204. Time format:
  4205.   * +0: byte: seconds
  4206.   * +1: byte: minutes
  4207.   * +2: byte: hours
  4208.   * +3: byte: reserved (0)
  4209.   * for example, 23.59.59 is written as (in hex) 3B 3B 17 00
  4210. Date format:
  4211.   * +0: byte: day
  4212.   * +1: byte: month
  4213.   * +2: word: year
  4214.   * for example, 25.11.1979 is written as (in hex) 19 0B BB 07
  4215. Remarks:
  4216.   * If BDFE contains ASCII name, the length of BDFE is 304 bytes,
  4217.     if UNICODE name - 560 bytes. Value of length is aligned
  4218.     on 16-byte bound (to accelerate processing in CPU cache).
  4219.   * First character after a name is zero (ASCIIZ-string). The further
  4220.     data contain garbage.
  4221.   * If files in folder were ended before requested number was read,
  4222.     the function will read as many as it can, and after that return
  4223.     eax=6 (EOF).
  4224.   * Any folder on the disk, except for root, contains two special
  4225.     entries "." and "..", identifying accordingly the folder itself
  4226.     and the parent folder.
  4227.   * The function allows also to read virtual folders "/", "/rd",
  4228.     "/fd", "/hd[n]", thus attributes of subfolders are set to 0x10,
  4229.     and times and dates are zeroed. An alternative way to get the
  4230.     equipment information - subfunction 11 of function 18.
  4231.  
  4232. ======================================================================
  4233. ===================== Function 70, subfunction 2 =====================
  4234. ============ Create/rewrite file with long names support. ============
  4235. ======================================================================
  4236. Parameters:
  4237.   * eax = 70 - function number
  4238.   * ebx = pointer to the information structure
  4239. Format of the information structure:
  4240.   * +0: dword: 2 = subfunction number
  4241.   * +4: dword: 0 (reserved)
  4242.   * +8: dword: 0 (reserved)
  4243.   * +12 = +0xC: dword: number of bytes to read
  4244.   * +16 = +0x10: dword: pointer to data
  4245.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4246.     given in the general description
  4247.     or
  4248.   * +20 = +0x14: db 0
  4249.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4250. Returned value:
  4251.   * eax = 0 - success, otherwise file system error code
  4252.   * ebx = number of written bytes (possibly 0)
  4253. Remarks:
  4254.   * If a file with given name did not exist, it is created;
  4255.     if it existed, it is rewritten.
  4256.   * If there is not enough free space on disk, the function will
  4257.     write as many as can and then return error code 8.
  4258.   * The function is not supported for CD (returns error code 2).
  4259.  
  4260. ======================================================================
  4261. ===================== Function 70, subfunction 3 =====================
  4262. =========== Write to existing file with long names support. ==========
  4263. ======================================================================
  4264. Parameters:
  4265.   * eax = 70 - function number
  4266.   * ebx = pointer to the information structure
  4267. Format of the information structure:
  4268.   * +0: dword: 3 = subfunction number
  4269.   * +4: dword: file offset (in bytes)
  4270.   * +8: dword: high dword of offset (must be 0 for FAT)
  4271.   * +12 = +0xC: dword: number of bytes to write
  4272.   * +16 = +0x10: dword: pointer to data
  4273.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4274.     given in the general description
  4275.     or
  4276.   * +20 = +0x14: db 0
  4277.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4278. Returned value:
  4279.   * eax = 0 - success, otherwise file system error code
  4280.   * ebx = number of written bytes (possibly 0)
  4281. Remarks:
  4282.   * The file must already exist, otherwise function returns eax=5.
  4283.   * The only result of write 0 bytes is update in the file attributes
  4284.     date/time of modification and access to the current date/time.
  4285.   * If beginning and/or ending position is greater than file size
  4286.     (except for the previous case), the file is expanded to needed
  4287.     size with zero characters.
  4288.   * The function is not supported for CD (returns error code 2).
  4289.  
  4290. ======================================================================
  4291. ============ Function 70, subfunction 4 - set end of file. ===========
  4292. ======================================================================
  4293. Parameters:
  4294.   * eax = 70 - function number
  4295.   * ebx = pointer to the information structure
  4296. Format of the information structure:
  4297.   * +0: dword: 4 = subfunction number
  4298.   * +4: dword: low dword of new file size
  4299.   * +8: dword: high dword of new file size (must be 0 for FAT)
  4300.   * +12 = +0xC: dword: 0 (reserved)
  4301.   * +16 = +0x10: dword: 0 (reserved)
  4302.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4303.     given in the general description
  4304.     or
  4305.   * +20 = +0x14: db 0
  4306.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4307. Returned value:
  4308.   * eax = 0 - success, otherwise file system error code
  4309.   * ebx destroyed
  4310. Remarks:
  4311.   * If the new file size is less than old one, file is truncated.
  4312.     If the new size is greater than old one, file is expanded with
  4313.     characters with code 0. If the new size is equal to old one,
  4314.     the only result of call is set date/time of modification and
  4315.     access to the current date/time.
  4316.   * If there is not enough free space on disk for expansion, the
  4317.     function will expand to maximum possible size and then return
  4318.     error code 8.
  4319.   * The function is not supported for CD (returns error code 2).
  4320.  
  4321. ======================================================================
  4322. ==== Function 70, subfunction 5 - get information on file/folder. ====
  4323. ======================================================================
  4324. Parameters:
  4325.   * eax = 70 - function number
  4326.   * ebx = pointer to the information structure
  4327. Format of the information structure:
  4328.   * +0: dword: 5 = subfunction number
  4329.   * +4: dword: 0 (reserved)
  4330.   * +8: dword: 0 (reserved)
  4331.   * +12 = +0xC: dword: 0 (reserved)
  4332.   * +16 = +0x10: dword: pointer to buffer for data (40 bytes)
  4333.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4334.     given in the general description
  4335.     or
  4336.   * +20 = +0x14: db 0
  4337.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4338. Returned value:
  4339.   * eax = 0 - success, otherwise file system error code
  4340.   * ebx destroyed
  4341. Information on file is returned in the BDFE format (block of data
  4342. for folder entry), explained in the description of
  4343. subfunction 1, but without filename
  4344. (i.e. only first 40 = 0x28 bytes).
  4345. Remarks:
  4346.   * The function does not support virtual folders such as /, /rd and
  4347.     root folders like /rd/1.
  4348.  
  4349. ======================================================================
  4350. ===== Function 70, subfunction 6 - set attributes of file/folder. ====
  4351. ======================================================================
  4352. Parameters:
  4353.   * eax = 70 - function number
  4354.   * ebx = pointer to the information structure
  4355. Format of the information structure:
  4356.   * +0: dword: 6 = subfunction number
  4357.   * +4: dword: 0 (reserved)
  4358.   * +8: dword: 0 (reserved)
  4359.   * +12 = +0xC: dword: 0 (reserved)
  4360.   * +16 = +0x10: dword: pointer to buffer with attributes (32 bytes)
  4361.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4362.     given in the general description
  4363.     or
  4364.   * +20 = +0x14: db 0
  4365.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4366. Returned value:
  4367.   * eax = 0 - success, otherwise file system error code
  4368.   * ebx destroyed
  4369. File attributes are first 32 bytes in BDFE (block of data
  4370. for folder entry), explained in the description of subfunction 1
  4371. (that is, without name and size of file). Attribute
  4372. file/folder/volume label (bits 3,4 in dword +0) is not changed.
  4373. Byte +4 (name format) is ignored.
  4374. Remarks:
  4375.   * The function does not support virtual folders such as /, /rd and
  4376.     root folders like /rd/1.
  4377.   * The function is not supported for CD (returns error code 2).
  4378.  
  4379. ======================================================================
  4380. =========== Function 70, subfunction 7 - start application. ==========
  4381. ======================================================================
  4382. Parameters:
  4383.   * eax = 70 - function number
  4384.   * ebx = pointer to the information structure
  4385. Format of the information structure:
  4386.   * +0: dword: 7 = subfunction number
  4387.   * +4: dword: flags field:
  4388.     * áèò 0: start process as debugged
  4389.     * other bits are reserved and must be set to 0
  4390.   * +8: dword: 0 or pointer to ASCIIZ-string with parameters
  4391.   * +12 = +0xC: dword: 0 (reserved)
  4392.   * +16 = +0x10: dword: 0 (reserved)
  4393.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4394.     given in the general description
  4395.     or
  4396.   * +20 = +0x14: db 0
  4397.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4398. Returned value:
  4399.   * eax > 0 - program is loaded, eax contains PID
  4400.   * eax < 0 - an error has occured, -eax contains
  4401.     file system error code
  4402.   * ebx destroyed
  4403. Remarks:
  4404.   * Command line must be terminated by the character with the code 0
  4405.     (ASCIIZ-string); function takes into account either all characters
  4406.     up to terminating zero inclusively or first 256 character
  4407.     regarding what is less.
  4408.   * If the process is started as debugged, it is created in
  4409.     the suspended state; to run use subfunction 5 of function 69.
  4410.  
  4411. ======================================================================
  4412. ========== Function 70, subfunction 8 - delete file/folder. ==========
  4413. ======================================================================
  4414. Parameters:
  4415.   * eax = 70 - function number
  4416.   * ebx = pointer to the information structure
  4417. Format of the information structure:
  4418.   * +0: dword: 8 = subfunction number
  4419.   * +4: dword: 0 (reserved)
  4420.   * +8: dword: 0 (reserved)
  4421.   * +12 = +0xC: dword: 0 (reserved)
  4422.   * +16 = +0x10: dword: 0 (reserved)
  4423.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4424.     given in the general description
  4425.     or
  4426.   * +20 = +0x14: db 0
  4427.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4428. Returned value:
  4429.   * eax = 0 - success, otherwise file system error code
  4430.   * ebx destroyed
  4431. Remarks:
  4432.   * The function is not supported for CD (returns error code 2).
  4433.   * The function can delete only empty folders (attempt to delete
  4434.     nonempty folder results in error with code 10, "access denied").
  4435.  
  4436. ======================================================================
  4437. ============= Function 70, subfunction 9 - create folder. ============
  4438. ======================================================================
  4439. Parameters:
  4440.   * eax = 70 - function number
  4441.   * ebx = pointer to the information structure
  4442. Format of the information structure:
  4443.   * +0: dword: 9 = subfunction number
  4444.   * +4: dword: 0 (reserved)
  4445.   * +8: dword: 0 (reserved)
  4446.   * +12 = +0xC: dword: 0 (reserved)
  4447.   * +16 = +0x10: dword: 0 (reserved)
  4448.   * +20 = +0x14: ASCIIZ-name of folder, the rules of names forming are
  4449.     given in the general description
  4450.     or
  4451.   * +20 = +0x14: db 0
  4452.   * +21 = +0x15: dd pointer to ASCIIZ-string with folder name
  4453. Returned value:
  4454.   * eax = 0 - success, otherwise file system error code
  4455.   * ebx destroyed
  4456. Remarks:
  4457.   * The function is not supported for CD (returns error code 2).
  4458.   * The parent folder must already exist.
  4459.   * If target folder already exists, function returns success (eax=0).
  4460.  
  4461. ======================================================================
  4462. ========== Function 71, subfunction 1 - set window caption. ==========
  4463. ======================================================================
  4464. Parameters:
  4465.   * eax = 71 - function number
  4466.   * ebx = 1 - subfunction number
  4467.   * ecx = pointer to caption string
  4468. Returned value:
  4469.   * function does not return value
  4470. Remarks:
  4471.   * String must be in the ASCIIZ-format. Disregarding real string
  4472.     length, no more than 255 characters are drawn.
  4473.   * Pass NULL in ecx to remove caption.
  4474.  
  4475. ======================================================================
  4476. =============== Function 72 - send message to a window. ==============
  4477. ======================================================================
  4478.  
  4479. - Subfunction 1 - send message with parameter to the active window. --
  4480. Parameters:
  4481.   * eax = 72 - function number
  4482.   * ebx = 1 - subfunction number
  4483.   * ecx = event code: 2 or 3
  4484.   * edx = parameter: key code for ecx=2, button identifier for ecx=3
  4485. Returned value:
  4486.   * eax = 0 - success
  4487.   * eax = 1 - buffer is full
  4488.  
  4489. ======================================================================
  4490. =============== Function -1 - terminate thread/process ===============
  4491. ======================================================================
  4492. Parameters:
  4493.   * eax = -1 - function number
  4494. Returned value:
  4495.   * function does not return neither value nor control
  4496. Remarks:
  4497.   * If the process did not create threads obviously, it has only
  4498.     one thread, which termination results in process termination.
  4499.   * If the current thread is last in the process, its termination
  4500.     also results in process terminates.
  4501.   * This function terminates the current thread. Other thread can be
  4502.     killed by call to subfunction 2 of function 18.
  4503.  
  4504. ======================================================================
  4505. =========================== List of events ===========================
  4506. ======================================================================
  4507. Next event can be retrieved by the call of one from functions 10
  4508. (to wait for event), 11 (to check without waiting), 23
  4509. (to wait during the given time).
  4510. These functions return only those events, which enter into a mask set
  4511. by function 40. By default it is first three,
  4512. there is enough for most applications.
  4513. Codes of events:
  4514.   * 1 = redraw event (is reset by call to function 0)
  4515.   * 2 = key on keyboard is pressed (acts, only when the window is
  4516.     active) or hotkey is pressed; is reset, when all keys from
  4517.     the buffer are read out by function 2
  4518.   * 3 = button is pressed, defined earlier by function 8
  4519.     (or close button, created implicitly by function 0;
  4520.     minimize button is handled by the system and sends no message;
  4521.     acts, only when the window is active;
  4522.     is reset when all buttons from the buffer
  4523.     are read out by function 17)
  4524.   * 4 = reserved (in current implementation never comes even after
  4525.     unmasking by function 40)
  4526.   * 5 = kernel finished redrawing of the desktop background
  4527.   * 6 = mouse event (something happened - button pressing or moving;
  4528.     is reset at reading)
  4529.   * 7 = IPC event (see function 60 -
  4530.     Inter Process Communication; is reset at reading)
  4531.   * 8 = network event (is reset at reading)
  4532.   * 9 = debug event (is reset at reading; see
  4533.     debug subsystem)
  4534.   * 16..31 = event with appropriate IRQ
  4535.     (16=IRQ0, 31=IRQ15) (is reset after reading all IRQ data)
  4536.  
  4537. ======================================================================
  4538. =================== Error codes of the file system ===================
  4539. ======================================================================
  4540.   * 0 = success
  4541.   * 1 = base and/or partition of a hard disk is not defined
  4542.     (by subfunctions 7, 8 of function 21)
  4543.   * 2 = function is not supported for the given file system
  4544.   * 3 = unknown file system
  4545.   * 4 = reserved, is never returned in the current implementation
  4546.   * 5 = file not found
  4547.   * 6 = end of file, EOF
  4548.   * 7 = pointer lies outside of application memory
  4549.   * 8 = disk is full
  4550.   * 9 = FAT table is destroyed
  4551.   * 10 = access denied
  4552.   * 11 = device error
  4553. Application start functions can return also following errors:
  4554.   * 30 = 0x1E = not enough memory
  4555.   * 31 = 0x1F = file is not executable
  4556.   * 32 = 0x20 = too many processes
  4557.