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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=1)
  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 (works for all window styles)
  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(20,ysize-1)) color indicated in esi
  86.       (taking a gradient into account)
  87.     * if ysize>21, 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,
  152.     bits 16-23 = contain scancode for pressed key in ASCII mode,
  153.                  in the scancodes mode this bits cleared.
  154.     bits 23-31 = zero
  155.   * if there is "hotkey", function returns al=2,
  156.     ah=scancode of the pressed key (0 for control keys),
  157.     high word of eax contains a status of control keys at the moment
  158.     of pressing a hotkey
  159. Remarks:
  160.   * There is a common system buffer of the pressed keys
  161.     by a size of 120 bytes, organized as queue.
  162.   * There is one more common system buffer on 120 "hotkeys".
  163.   * If the application with the inactive window calls this function,
  164.     the buffer of the pressed keys is considered to be empty.
  165.   * By default this function returns ASCII-codes; to switch
  166.     to the scancodes mode (and back) use function 66.
  167.     However, hotkeys are always notificated as scancodes.
  168.   * To find out, what keys correspond to what codes, start
  169.     the application keyascii and scancode.
  170.   * Scancodes come directly from keyboard and are fixed;
  171.     ASCII-codes turn out with usage of the conversion tables,
  172.     which can be set by subfunction 2 of function 21
  173.     and get by subfunction 2 of function 26.
  174.   * As a consequence, ASCII-codes take into account current
  175.     keyboard layout (rus/en) as opposed to scancodes.
  176.   * This function notifies only about those hotkeys, which were
  177.     defined by this thread by subfunction 4 of function 66.
  178.  
  179. ======================================================================
  180. ==================== Function 3 - get system time. ===================
  181. ======================================================================
  182. Parameters:
  183.   * eax = 3 - function number
  184. Returned value:
  185.   * eax = 0x00SSMMHH, where HH:MM:SS = Hours:Minutes:Seconds
  186.   * each item is BCD-number, for example,
  187.     for time 23:59:59 function returns 0x00595923
  188. Remarks:
  189.   * See also subfunction 9 of function 26 - get time from
  190.     the moment of start of the system; it is more convenient, because
  191.     returns simply DWORD-value of the time counter.
  192.   * System time can be set by function 22.
  193.  
  194. ======================================================================
  195. =================== Function 4 - draw text string. ===================
  196. ======================================================================
  197. Parameters:
  198.   * eax = 4 - function number
  199.   * ebx = X*65536+Y, coordinates in the window or buffer
  200.   * ecx = 0xXXRRGGBB, where
  201.     * RR, GG, BB specify text color
  202.     * XX = ABFFCSSS (bits):
  203.       * A=1 - output zero terminated string
  204.       * B=1 - fill background (color = edi)
  205.       * FF specifies the font and encoding:
  206.         0 = 6x9  cp866
  207.         2 = 8x16 UTF-16LE
  208.         3 = 8x16 UTF-8
  209.       * C=0 - draw to the window,
  210.         C=1 - draw to the user buffer (edi)
  211.       * SSS = (size multiplier)-1, so 0 = x1, 7 = x8
  212.   * edx = pointer to the beginning of the string
  213.   * esi = for A=0 length of the string, for A=1 is ignored
  214.   * edi = for B=1 color to fill background,
  215.           for C=1 pointer to user buffer
  216.  
  217. Returned value:
  218.   * function does not return value
  219. Remarks:
  220.   * You can not use B=1 and C=1 at the same time, since both use edi.
  221.   * When SSS=0, font may be smoothed, depending on system setting.
  222.   * User buffer structure:
  223. Xsize       dd
  224. Ysize       dd
  225. picture     rb  Xsize*Ysize*4  ; 32 bpp
  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.     * +75 = +0x4B: byte: keyboard mode(ASCII = 0; SCAN = 1)
  371. Remarks:
  372.   * Slots are numbered starting from 1.
  373.   * Returned value is not a total number of threads, because there
  374.     can be free slots.
  375.   * When process is starting, system automatically creates
  376.     execution thread.
  377.   * Function gives information on the thread. Each process has
  378.     at least one thread. One process can create many threads,
  379.     in this case each thread has its own slot and the fields
  380.     +10, +22, +26 in these slots coincide.
  381.     Applications have no common way to define whether two threads
  382.     belong to one process.
  383.   * The active window - window on top of the window stack -
  384.     receives the messages on a keyboard input. For such window
  385.     the position in the window stack coincides with returned value.
  386.   * Slot 1 corresponds to special system thread, for which:
  387.     * the window is in the bottom of the window stack, the fields
  388.       +4 and +6 contain value 1
  389.     * name of the process - "OS/IDLE" (supplemented by spaces)
  390.     * address of the process in memory is 0, size of used memory is
  391.       16 Mb (0x1000000)
  392.     * PID=1
  393.     * coordinates and sizes of the window and the client area are by
  394.       convention set to 0
  395.     * status of the slot is always 0 (running)
  396.     * the execution time adds of time leaving on operations itself
  397.       and idle time in waiting for interrupt (which can be got by call
  398.       to subfunction 4 of function 18).
  399.   * Beginning from slot 2, the normal applications are placed.
  400.   * The normal applications are placed in memory at the address
  401.     0 (kernel constant 'std_application_base_address').
  402.     There is no intersection, as each process has its own page table.
  403.   * At creation of the thread it is assigned the slot
  404.     in the system table and identifier (Process/Thread IDentifier =
  405.     PID/TID), which do not vary with time for given thread.
  406.     After completion of the thread its slot can be anew used
  407.     for another thread. The thread identifier can not be assigned
  408.     to other thread even after completion of this thread.
  409.     Identifiers, assigned to new threads, grow monotonously.
  410.   * If the thread has not yet defined the window by call to
  411.     function 0, the position and the sizes
  412.     of its window are considered to be zero.
  413.   * Coordinates of the client area are relative to the window.
  414.   * At the moment only the part of the buffer by a size
  415.     76 = 0x4C bytes is used. Nevertheless it is recommended to use
  416.     1-Kb buffer for the future compatibility, in the future
  417.     some fields can be added.
  418.  
  419. ======================================================================
  420. ==================== Function 10 - wait for event. ===================
  421. ======================================================================
  422. If the message queue is empty, waits for appearance of the message
  423. in queue. In this state thread does not consume CPU time.
  424. Then reads out the message from queue.
  425.  
  426. Parameters:
  427.   * eax = 10 - function number
  428. Returned value:
  429.   * eax = event (see the list of events)
  430. Remarks:
  431.   * Those events are taken into account only which enter into
  432.     a mask set by function 40. By default it is
  433.     redraw, key and button events.
  434.   * To check, whether there is a message in queue, use function 11.
  435.     To wait for no more than given time, use function 23.
  436.  
  437. ======================================================================
  438. =============== Function 11 - check for event, no wait. ==============
  439. ======================================================================
  440. If the message queue contains event, function reads out
  441. and return it. If the queue is empty, function returns 0.
  442. Parameters:
  443.   * eax = 11 - function number
  444. Returned value:
  445.   * eax = 0 - message queue is empty
  446.   * else eax = event (see the list of events)
  447. Remarks:
  448.   * Those events are taken into account only, which enter into
  449.     a mask set by function 40. By default it is
  450.     redraw, key and button events.
  451.   * To wait for event, use function 10.
  452.     To wait for no more than given time, use function 23.
  453.  
  454. ======================================================================
  455. =============== Function 12 - begin/end window redraw. ===============
  456. ======================================================================
  457.  
  458. ---------------- Subfunction 1 - begin window redraw. ----------------
  459. Parameters:
  460.   * eax = 12 - function number
  461.   * ebx = 1 - subfunction number
  462. Returned value:
  463.   * function does not return value
  464.  
  465. ----------------- Subfunction 2 - end window redraw. -----------------
  466. Parameters:
  467.   * eax = 12 - function number
  468.   * ebx = 2 - subfunction number
  469. Returned value:
  470.   * function does not return value
  471. Remarks:
  472.   * Subfunction 1 deletes all buttons defined with
  473.     function 8, they must be defined again.
  474.  
  475. ======================================================================
  476. ============ Function 13 - draw a rectangle in the window. ===========
  477. ======================================================================
  478. Parameters:
  479.   * eax = 13 - function number
  480.   * ebx = [coordinate on axis x]*65536 + [size on axis x]
  481.   * ecx = [coordinate on axis y]*65536 + [size on axis y]
  482.   * edx = color 0xRRGGBB or 0x80RRGGBB for gradient fill
  483. Returned value:
  484.   * function does not return value
  485. Remarks:
  486.   * Coordinates are understood as coordinates of the left upper corner
  487.     of a rectangle relative to the window.
  488.  
  489. ======================================================================
  490. =================== Function 14 - get screen size. ===================
  491. ======================================================================
  492. Parameters:
  493.   * eax = 14 - function number
  494. Returned value:
  495.   * eax = [xsize]*65536 + [ysize], where
  496.   * xsize = x-coordinate of the right lower corner of the screen =
  497.             horizontal size - 1
  498.   * ysize = y-coordinate of the right lower corner of the screen =
  499.             vertical size - 1
  500. Remarks:
  501.   * See also subfunction 5 of function 48 - get sizes of
  502.     working area of the screen.
  503.  
  504. ======================================================================
  505. == Function 15, subfunction 1 - set a size of the background image. ==
  506. ======================================================================
  507. Parameters:
  508.   * eax = 15 - function number
  509.   * ebx = 1 - subfunction number
  510.   * ecx = width of the image
  511.   * edx = height of the image
  512. Returned value:
  513.   * function does not return value
  514. Remarks:
  515.   * Before calling subfunctions 2 and 5 you should call this function
  516.     to set image size!
  517.   * For update of the screen (after completion of a series of commands
  518.     working with a background) call subfunction 3.
  519.   * There is a pair function for get size of the background image -
  520.     subfunction 1 of function 39.
  521.  
  522. ======================================================================
  523. === Function 15, subfunction 2 - put pixel on the background image. ==
  524. ======================================================================
  525. Parameters:
  526.   * eax = 15 - function number
  527.   * ebx = 2 - subfunction number
  528.   * ecx = offset
  529.   * edx = color of a pixel 0xRRGGBB
  530. Returned value:
  531.   * function does not return value
  532. Remarks:
  533.   * Offset for a pixel with coordinates (x,y) is calculated as
  534.     (x+y*xsize)*3.
  535.   * If the given offset exceeds size set by subfunction 1,
  536.     the call is ignored.
  537.   * For update of the screen (after completion of a series of commands
  538.     working with a background) call subfunction 3.
  539.   * There is a pair function for get pixel on the background image -
  540.     subfunction 2 of function 39.
  541.  
  542. ======================================================================
  543. =========== Function 15, subfunction 3 - redraw background. ==========
  544. ======================================================================
  545. Parameters:
  546.   * eax = 15 - function number
  547.   * ebx = 3 - subfunction number
  548. Returned value:
  549.   * function does not return value
  550.  
  551. ======================================================================
  552. == Function 15, subfunction 4 - set drawing mode for the background. =
  553. ======================================================================
  554. Parameters:
  555.   * eax = 15 - function number
  556.   * ebx = 4 - subfunction number
  557.   * ecx = drawing mode:
  558.     * 1 = tile
  559.     * 2 = stretch
  560. Returned value:
  561.   * function does not return value
  562. Remarks:
  563.   * For update of the screen (after completion of a series of commands
  564.     working with a background) call subfunction 3.
  565.   * There is a pair function for get drawing mode of the background -
  566.     subfunction 4 of function 39.
  567.  
  568. ======================================================================
  569. ===================== Function 15, subfunction 5 =====================
  570. ============ Put block of pixels on the background image. ============
  571. ======================================================================
  572. Parameters:
  573.   * eax = 15 - function number
  574.   * ebx = 5 - subfunction number
  575.   * ecx = pointer to the data in the format BBGGRRBBGGRR...
  576.   * edx = offset in data of the background image
  577.   * esi = size of data in bytes = 3 * number of pixels
  578. Returned value:
  579.   * function does not return value
  580. Remarks:
  581.   * Offset and size are not checked for correctness.
  582.   * Color of each pixel is stored as 3-bytes value BBGGRR.
  583.   * Pixels of the background image are written sequentially
  584.     from left to right, from up to down.
  585.   * Offset of pixel with coordinates (x,y) is (x+y*xsize)*3.
  586.   * For update of the screen (after completion of a series of commands
  587.     working with a background) call subfunction 3.
  588.  
  589. ======================================================================
  590. ===================== Function 15, subfunction 6 =====================
  591. ======== Map background data to the address space of process. ========
  592. ======================================================================
  593. Parameters:
  594.   * eax = 15 - function number
  595.   * ebx = 6 - subfunction number
  596. Returned value:
  597.   * eax = pointer to background data, 0 if error
  598. Remarks:
  599.   * Mapped data are available for read and write.
  600.   * Size of background data is 3*xsize*ysize. The system blocks
  601.     changes of background sizes while process works with mapped data.
  602.   * Color of each pixel is stored as 3-bytes value BBGGRR.
  603.   * Pixels of the background image are written sequentially
  604.     from left to right, from up to down.
  605.  
  606. ======================================================================
  607. ===== Function 15, subfunction 7 - close mapped background data. =====
  608. ======================================================================
  609. Parameters:
  610.   * eax = 15 - function number
  611.   * ebx = 7 - subfunction number
  612.   * ecx = pointer to mapped data
  613. Returned value:
  614.   * eax = 1 - success, 0 - error
  615.  
  616. ======================================================================
  617. ===================== Function 15, subfunction 8 =====================
  618. ============= Get coordinates of last draw the background ============
  619. ======================================================================
  620. Parameters:
  621.   * eax = 15 - function number
  622.   * ebx = 8 - subfunction number
  623. Returned value:
  624.   * eax = [left]*65536 + [right]
  625.   * ebx = [top]*65536 + [bottom]
  626. Remarks:
  627.   * (left,top) are coordinates of the left upper corner,
  628.     (right,bottom) are coordinates of the right lower one.
  629.   * For receiving more reliable information, call the function
  630.     immediately after the event:
  631.              5 = kernel finished redrawing of the desktop background
  632.  
  633. ======================================================================
  634. ===================== Function 15, subfunction 9 =====================
  635. ============= Redraws a rectangular part of the background ===========
  636. ======================================================================
  637. Parameters:
  638.   * eax = 15 - function number
  639.   * ebx = 9 - subfunction number
  640.   * ecx = [left]*65536 + [right]
  641.   * edx = [top]*65536 + [bottom]
  642. Returned value:
  643.   * function does not return value
  644. Remarks:
  645.   * (left,top) are coordinates of the left upper corner,
  646.     (right,bottom) are coordinates of the right lower one.
  647.   * If parameters are set incorrectly then background is not redrawn.
  648.  
  649. ======================================================================
  650. =============== Function 16 - save ramdisk on a floppy. ==============
  651. ======================================================================
  652. Parameters:
  653.   * eax = 16 - function number
  654.   * ebx = 1 or ebx = 2 - on which floppy save
  655. Returned value:
  656.   * eax = 0 - success
  657.   * eax = 1 - error
  658.  
  659. ======================================================================
  660. ======= Function 17 - get the identifier of the pressed button. ======
  661. ======================================================================
  662. Takes away the code of the pressed button from the buffer.
  663. Parameters:
  664.   * eax = 17 - function number
  665. Returned value:
  666.   * if the buffer is empty, function returns eax=1
  667.   * if the buffer is not empty:
  668.     * high 24 bits of eax contain button identifier (in particular,
  669.       ah contains low byte of the identifier; if all buttons have
  670.       the identifier less than 256, ah is enough to distinguish)
  671.     * al = 0 - the button was pressed with left mouse button
  672.     * al = bit corresponding to used mouse button otherwise
  673. Remarks:
  674.   * "Buffer" keeps only one button, at pressing the new button the
  675.     information about old is lost.
  676.   * The call of this function by an application with inactive window
  677.     will return answer "buffer is empty".
  678.   * Returned value for al corresponds to the state of mouse buttons
  679.     as in subfunction 2 of function 37 at the beginning
  680.     of button press, excluding lower bit, which is cleared.
  681.  
  682. ======================================================================
  683. ===================== Function 18, subfunction 1 =====================
  684. ============= Make deactive the window of the given thread. ==========
  685. ======================================================================
  686. Parameters:
  687.   * eax = 18 - function number
  688.   * ebx = 1 - subfunction number
  689.   * ecx = number of the thread slot
  690. Returned value:
  691.   * function does not return value
  692.  
  693. ======================================================================
  694. = Function 18, subfunction 2 - terminate process/thread by the slot. =
  695. ======================================================================
  696. Parameters:
  697.   * eax = 18 - function number
  698.   * ebx = 2 - subfunction number
  699.   * ecx = number of the slot of process/thread
  700. Returned value:
  701.   * function does not return value
  702. Remarks:
  703.   * It is impossible to terminate system thread OS/IDLE (with
  704.     number of the slot 1),
  705.     it is possible to terminate any normal process/thread.
  706.   * See also subfunction 18 - terminate
  707.     process/thread by the identifier.
  708.  
  709. ======================================================================
  710. ===================== Function 18, subfunction 3 =====================
  711. ============= Make active the window of the given thread. ============
  712. ======================================================================
  713. Parameters:
  714.   * eax = 18 - function number
  715.   * ebx = 3 - subfunction number
  716.   * ecx = number of the thread slot
  717. Returned value:
  718.   * function does not return value
  719. Remarks:
  720.   * If correct, but nonexistent slot is given,
  721.     some window is made active.
  722.   * To find out, which window is active, use subfunction 7.
  723.  
  724. ======================================================================
  725. ===================== Function 18, subfunction 4 =====================
  726. =========== Get counter of idle time units per one second. ===========
  727. ======================================================================
  728. Idle time units are units, in which the processor stands idle
  729. in waiting for interrupt (in the command 'hlt').
  730.  
  731. Parameters:
  732.   * eax = 18 - function number
  733.   * ebx = 4 - subfunction number
  734. Returned value:
  735.   * eax = value of the counter of idle time units per one second
  736.  
  737. ======================================================================
  738. ========== Function 18, subfunction 5 - get CPU clock rate. ==========
  739. ======================================================================
  740. Parameters:
  741.   * eax = 18 - function number
  742.   * ebx = 5 - subfunction number
  743. Returned value:
  744.   * eax = clock rate (modulo 2^32 clock ticks = 4GHz)
  745.  
  746. ======================================================================
  747.  Function 18, subfunction 6 - save ramdisk to the file on hard drive.
  748. ======================================================================
  749. Parameters:
  750.   * eax = 18 - function number
  751.   * ebx = 6 - subfunction number
  752.   * ecx = pointer to the full path to file
  753.     (for example, "/hd0/1/kolibri/kolibri.img")
  754. Returned value:
  755.   * eax = 0 - success
  756.   * else eax = error code of the file system
  757. Remarks:
  758.   * All folders in the given path must exist, otherwise function
  759.     returns value 5, "file not found".
  760.  
  761. ======================================================================
  762. =========== Function 18, subfunction 7 - get active window. ==========
  763. ======================================================================
  764. Parameters:
  765.   * eax = 18 - function number
  766.   * ebx = 7 - subfunction number
  767. Returned value:
  768.   * eax = number of the active window
  769.     (number of the slot of the thread with active window)
  770. Remarks:
  771.   * Active window is at the top of the window stack and receives
  772.     messages on all keyboard input.
  773.   * To make a window active, use subfunction 3.
  774.  
  775. ======================================================================
  776. == Function 18, subfunction 8 - disable/enable the internal speaker. =
  777. ======================================================================
  778. If speaker sound is disabled, all calls to subfunction 55 of
  779. function 55 are ignored. If speaker sound is enabled,
  780. they are routed on builtin speaker.
  781.  
  782. ------------------- Subsubfunction 1 - get status. -------------------
  783. Parameters:
  784.   * eax = 18 - function number
  785.   * ebx = 8 - subfunction number
  786.   * ecx = 1 - number of the subsubfunction
  787. Returned value:
  788.   * eax = 0 - speaker sound is enabled; 1 - disabled
  789.  
  790. ----------------- Subsubfunction 2 - toggle status. ------------------
  791. Toggles states of disable/enable.
  792. Parameters:
  793.   * eax = 18 - function number
  794.   * ebx = 8 - subfunction number
  795.   * ecx = 2 - number of the subsubfunction
  796. Returned value:
  797.   * function does not return value
  798.  
  799. ======================================================================
  800. == Function 18, subfunction 9 - system shutdown with the parameter. ==
  801. ======================================================================
  802. Parameters:
  803.   * eax = 18 - function number
  804.   * ebx = 9 - subfunction number
  805.   * ecx = parameter:
  806.     * 2 = turn off computer
  807.     * 3 = reboot computer
  808.     * 4 = restart the kernel from the file 'kernel.mnt' on ramdisk
  809. Returned value:
  810.   * at incorrect ecx the registers do not change (i.e. eax=18)
  811.   * by correct call function always returns eax=0
  812.     as the tag of success
  813. Remarks:
  814.   * Do not rely on returned value by incorrect call, it can be
  815.     changed in future versions of the kernel.
  816.  
  817. ======================================================================
  818. ======= Function 18, subfunction 10 - minimize topmost window. =======
  819. ======================================================================
  820. Minimizes the topmost (active) window.
  821. Parameters:
  822.   * eax = 18 - function number
  823.   * ebx = 10 - subfunction number
  824. Returned value:
  825.   * function does not return value
  826. Remarks:
  827.   * The minimized window from the point of view of function 9
  828.     keeps position and sizes.
  829.   * Restoring of an application window occurs at its activation by
  830.     subfunction 3.
  831.   * Usually there is no necessity to minimize/restore a window
  832.     explicitly: minimization of a window is carried out by the system
  833.     at pressing the minimization button (for skinned windows
  834.     it is defined automatically by function 0,
  835.     for other windows it can be defined manually by function 8),
  836.     restore of a window is done by the application '@taskbar'.
  837.  
  838. ======================================================================
  839.  Function 18, subfunction 11 - get information on the disk subsystem.
  840. ======================================================================
  841. Parameters:
  842.   * eax = 18 - function number
  843.   * ebx = 11 - subfunction number
  844.   * ecx = type of the table:
  845.     * 1 = short version, 16 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.    
  863.   First IDE controller:
  864.   * +1: byte: information about hard disks and CD-drives, AABBCCDD,
  865.     where AA corresponds to the controller IDE0, ..., DD - IDE3:
  866.     * 0 = device not found
  867.     * 1 = hard drive
  868.     * 2 = CD-drive
  869.     For example, in the case HD on IDE0 and CD on IDE2
  870.     this field contains 48h.
  871.   * +2: 4 db: number of the retrieved partitions on hard disks
  872.     at accordingly IDE0,...,IDE3.
  873.    
  874.   Second IDE controller:
  875.   * +6: byte: information about hard disks and CD-drives, AABBCCDD,
  876.     where AA corresponds to the controller IDE4, ..., DD - IDE7:
  877.     * 0 = device not found
  878.     * 1 = hard drive
  879.     * 2 = CD-drive
  880.     For example, in the case HD on IDE4 and CD on IDE6
  881.     this field contains 48h.
  882.   * +7: 4 db: number of the retrieved partitions on hard disks
  883.     at accordingly IDE4,...,IDE7.
  884.  
  885.   Third IDE controller:
  886.   * +11: byte: information about hard disks and CD-drives, AABBCCDD,
  887.     where AA corresponds to the controller IDE8, ..., DD - IDE11:
  888.     * 0 = device not found
  889.     * 1 = hard drive
  890.     * 2 = CD-drive
  891.     For example, in the case HD on IDE8 and CD on IDE10
  892.     this field contains 48h.
  893.   * +12: 4 db: number of the retrieved partitions on hard disks
  894.     at accordingly IDE8,...,IDE11.  
  895.    
  896.     If the hard disk on IDEx is absent, appropriate byte is zero,
  897.     otherwise it shows number of the recognized partitions, which
  898.     can be not presented (if the drive is not formatted or if
  899.     the file system is not supported). Current version of the kernel
  900.     supports only FAT12/16/32, NTFS, ext2/3/4 and XFS for hard disks.
  901.  
  902. Remarks:
  903.   * The table can be used for obtaining the information about
  904.     available devices.
  905.  
  906. ======================================================================
  907. ========== Function 18, subfunction 13 - get kernel version. =========
  908. ======================================================================
  909. Parameters:
  910.   * eax = 18 - function number
  911.   * ebx = 13 - subfunction number
  912.   * ecx = pointer to the buffer (not less than 16 bytes), where
  913.     the information will be placed
  914. Returned value:
  915.   * function does not return value
  916. Structure of the buffer:
  917. db a,b,c,d for version a.b.c.d
  918. db 0: reserved
  919. dd REV - kernel SVN revision number
  920. For Kolibri 0.7.7.0+ kernel:
  921. db 0,7,7,0
  922. db 0
  923. dd 1675
  924.  
  925. ======================================================================
  926. ======= Function 18, subfunction 14 - wait for screen retrace. =======
  927. ======================================================================
  928. Waits for the beginning of retrace of the scanning ray of the screen
  929. monitor.
  930. Parameters:
  931.   * eax = 18 - function number
  932.   * ebx = 14 - subfunction number
  933. Returned value:
  934.   * eax = 0 as the tag of success
  935. Remarks:
  936.   * Function is intended only for active high-efficiency graphics
  937.     applications; is used for smooth output of a graphics.
  938.  
  939. ======================================================================
  940. == Function 18, subfunction 15 - center mouse cursor on the screen. ==
  941. ======================================================================
  942. Parameters:
  943.   * eax = 18 - function number
  944.   * ebx = 15 - subfunction number
  945. Returned value:
  946.   * eax = 0 as the tag of success
  947.  
  948. ======================================================================
  949. ========= Function 18, subfunction 16 - get size of free RAM. ========
  950. ======================================================================
  951. Parameters:
  952.   * eax = 18 - function number
  953.   * ebx = 16 - subfunction number
  954. Returned value:
  955.   * eax = size of free memory in kilobytes
  956.  
  957. ======================================================================
  958. ======== Function 18, subfunction 17 - get full amount of RAM. =======
  959. ======================================================================
  960. Parameters:
  961.   * eax = 18 - function number
  962.   * ebx = 17 - subfunction number
  963. Returned value:
  964.   * eax = total size of existing memory in kilobytes
  965.  
  966. ======================================================================
  967. ===================== Function 18, subfunction 18 ====================
  968. ============= Terminate process/thread by the identifier. ============
  969. ======================================================================
  970. Parameters:
  971.   * eax = 18 - function number
  972.   * ebx = 18 - subfunction number
  973.   * ecx = identifer of process/thread (PID/TID)
  974. Returned value:
  975.   * eax = 0 - success
  976.   * eax = -1 - error (process is not found or is system)
  977. Remarks:
  978.   * It is impossible to terminate system thread OS/IDLE (identifier
  979.     1), it is possible to terminate any normal process/thread.
  980.   * See also subfunction 2 - terminate
  981.     process/thread by given slot.
  982.  
  983. ======================================================================
  984. ======== Function 18, subfunction 19 - get/set mouse features. =======
  985. ======================================================================
  986.  
  987. ---------------- Subsubfunction 0 - get mouse speed. -----------------
  988. Parameters:
  989.   * eax = 18 - function number
  990.   * ebx = 19 - subfunction number
  991.   * ecx = 0 - subsubfunction number
  992. Returned value:
  993.   * eax = current mouse speed
  994.  
  995. ---------------- Subsubfunction 1 - set mouse speed. -----------------
  996. Parameters:
  997.   * eax = 18 - function number
  998.   * ebx = 19 - subfunction number
  999.   * ecx = 1 - subsubfunction number
  1000.   * edx = new value for speed
  1001. Returned value:
  1002.   * function does not return value
  1003.  
  1004. ---------------- Subsubfunction 2 - get mouse delay. -----------------
  1005. Parameters:
  1006.   * eax = 18 - function number
  1007.   * ebx = 19 - subfunction number
  1008.   * ecx = 2 - subsubfunction number
  1009. Returned value:
  1010.   * eax = current mouse delay
  1011.  
  1012. ---------------- Subsubfunction 3 - set mouse delay. -----------------
  1013. Parameters:
  1014.   * eax = 18 - function number
  1015.   * ebx = 19 - subfunction number
  1016.   * ecx = 3 - subsubfunction number
  1017.   * edx = new value for mouse delay
  1018. Returned value:
  1019.   * function does not return value
  1020.  
  1021. ----------- Subsubfunction 4 - set mouse pointer position. -----------
  1022. Parameters:
  1023.   * eax = 18 - function number
  1024.   * ebx = 19 - subfunction number
  1025.   * ecx = 4 - subsubfunction number
  1026.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  1027. Returned value:
  1028.   * function does not return value
  1029.  
  1030. -------- Subsubfunction 5 - simulate state of mouse buttons. ---------
  1031. Parameters:
  1032.   * eax = 18 - function number
  1033.   * ebx = 19 - subfunction number
  1034.   * ecx = 5 - subsubfunction number
  1035.   * edx = information about emulated state of mouse buttons:
  1036.     (same as return value in subfunction 2 of function 37)
  1037.     * bit 0 is set = left button is pressed
  1038.     * bit 1 is set = right button is pressed
  1039.     * bit 2 is set = middle button is pressed
  1040.     * bit 3 is set = 4th button is pressed
  1041.     * bit 4 is set = 5th button is pressed
  1042. Returned value:
  1043.   * function does not return value
  1044.  
  1045. -------------- Subsubfunction 6 - get doubleclick delay. -------------
  1046. Parameters:
  1047.   * eax = 18 - function number
  1048.   * ebx = 19 - subfunction number
  1049.   * ecx = 6 - subsubfunction number
  1050. Returned value:
  1051.   * eax = current doubleclick delay (100 = 1 second)
  1052.  
  1053. -------------- Subsubfunction 7 - set doubleclick delay. -------------
  1054. Parameters:
  1055.   * eax = 18 - function number
  1056.   * ebx = 19 - subfunction number
  1057.   * ecx = 7 - subsubfunction number
  1058.   * dl  = new value for doubleclick delay (100 = 1 second)
  1059. Returned value:
  1060.   * function does not return value
  1061.  
  1062. Remarks:
  1063.   * It is recommended to set speed of the mouse (in subsubfunction 1)
  1064.     from 1 up to 9. The installed value is not inspected by the kernel
  1065.     code, so set it carefully, at incorrect value the cursor
  1066.     can "freeze". Speed of the mouse can be regulated through the
  1067.     application SETUP.
  1068.   * Recommended delay of the mouse (in subsubfunction 3) = 10. Lower
  1069.     value is not handled by COM mice. At the very large values the
  1070.     movement of the mouse on 1 pixel is impossible and the cursor will
  1071.     jump on the value of installed speed (subsubfunction 1). The
  1072.     installed value is not inspected by the kernel code.
  1073.     Mouse delay can be regulated through the application SETUP.
  1074.   * The subsubfunction 4 does not check the passed value. Before
  1075.     its call find out current screen resolution (with function 14)
  1076.     and check that the value of position is inside the limits of the
  1077.     screen.
  1078.  
  1079. ======================================================================
  1080. ======== Function 18, subfunction 20 - get information on RAM. =======
  1081. ======================================================================
  1082. Parameters:
  1083.   * eax = 18 - function number
  1084.   * ebx = 20 - subfunction number
  1085.   * ecx = pointer to the buffer for information (36 bytes)
  1086. Returned value:
  1087.   * eax = total size of existing RAM in pages
  1088.     or -1 if error has occured
  1089.   * buffer pointed to by ecx contains the following information:
  1090.     * +0:  dword: total size of existing RAM in pages
  1091.     * +4:  dword: size of free RAM in pages
  1092.     * +8:  dword: number of page faults (exceptions #PF)
  1093.                  in applications
  1094.     * +12: dword: size of kernel heap in bytes
  1095.     * +16: dword: free in kernel heap in bytes
  1096.     * +20: dword: total number of memory blocks in kernel heap
  1097.     * +24: dword: number of free memory blocks in kernel heap
  1098.     * +28: dword: size of maximum free block in kernel heap
  1099.                  (reserved)
  1100.     * +32: dword: size of maximum allocated block in kernel heap
  1101.                  (reserved)
  1102.  
  1103. ======================================================================
  1104. ===================== Function 18, subfunction 21 ====================
  1105. ======== Get slot number of process/thread by the identifier. ========
  1106. ======================================================================
  1107. Parameters:
  1108.   * eax = 18 - function number
  1109.   * ebx = 21 - subfunction number
  1110.   * ecx = identifer of process/thread (PID/TID)
  1111. Returned value:
  1112.   * eax = 0 - error (invalid identifier)
  1113.   * otherwise eax = slot number
  1114.  
  1115. ======================================================================
  1116. ===================== Function 18, subfunction 22 ====================
  1117. ============== Operations with window of another thread. =============
  1118. ======================================================================
  1119. Parameters:
  1120.   * eax = 18 - function number
  1121.   * ebx = 22 - subfunction number
  1122.   * ecx = operation type:
  1123.     * 0 = minimize window of the thread with given slot number
  1124.     * 1 = minimize window of the thread with given identifier
  1125.     * 2 = restore window of the thread with given slot number
  1126.     * 3 = restore window of the thread with given identifier
  1127.   * edx = parameter (slot number or PID/TID)
  1128. Returned value:
  1129.   * eax = 0 - success
  1130.   * eax = -1 - error (invalid identifier)
  1131. Remarks:
  1132.   * The thread can minimize its window with subfunction 10.
  1133.   * One can restore and activate window simultaneously with
  1134.     subfunction 3 (which requires slot number).
  1135.  
  1136. ======================================================================
  1137. ======== Function 18, subfunction 23 - minimize all windows. ==========
  1138. ======================================================================
  1139. Parameters:
  1140.   * eax = 18 - function number
  1141.   * ebx = 23 - subfunction number
  1142. Returned value:
  1143.   * eax = 0 - all windows have been minimized before a function call
  1144.   * eax = N - number of windows minimized from function
  1145. Remarks:
  1146.   * Window of special thread (name begin to symbol @) is not minimize.
  1147.  
  1148. ======================================================================
  1149. ======= Function 18, subfunction 24 - set limits of screen. ==========
  1150. ======================================================================
  1151. Parameters:
  1152.   * eax = 18 - function number
  1153.   * ebx = 24 - subfunction number
  1154.   * ecx = new X size
  1155.   * edx = new Y size
  1156. Returned value:
  1157.   * function does not return value
  1158. Remarks:
  1159.   * The function does not change the physical size of the video mode.
  1160.     It is designed for non-standard displays which display the image
  1161.     partially.
  1162.   * The sizes specified in the function should not exceed the sizes
  1163.     of the current video mode, otherwise the function will not change
  1164.     anything.
  1165.  
  1166. ======================================================================
  1167. ===================== Function 18, subfunction 25 ====================
  1168. ===== Control position of the window relative to other windows. ======
  1169. ======================================================================
  1170.  
  1171. ------------- Subsubfunction 1 - get position  -----------------------
  1172. Parameters:
  1173.   * eax = 18 - function number
  1174.   * ebx = 25 - subfunction number
  1175.   * ecx = 1 - subsubfunction number
  1176.   * edx = -1(for current window) or PID application
  1177. Returned value:
  1178.   * eax = one of the constants window position
  1179.  
  1180. ------------- Subsubfunction 2 - set position  -----------------------
  1181. Parameters:
  1182.   * eax = 18 - function number
  1183.   * ebx = 25 - subfunction number
  1184.   * ecx = 2 - subsubfunction number
  1185.   * edx = -1(for current window) or PID application
  1186.   * esi = new window position (one of the constants below)
  1187. Returned value:
  1188.   * eax = 0 - error
  1189.   * eax = 1 - success
  1190.  
  1191. Constant position of the window relative to other windows:
  1192.  ZPOS_DESKTOP     = -2 - on the background
  1193.  ZPOS_ALWAYS_BACK = -1 - behind all the windows
  1194.  ZPOS_NORMAL      = 0  - normal
  1195.  ZPOS_ALWAYS_TOP  = 1  - on top of all windows
  1196.  
  1197. ======================================================================
  1198. ==================== Function 20 - MIDI interface. ===================
  1199. ======================================================================
  1200.  
  1201. ----------------------- Subfunction 1 - reset ------------------------
  1202. Parameters:
  1203.   * eax = 20 - function number
  1204.   * ebx = 1 - subfunction number
  1205.  
  1206. -------------------- Subfunction 2 - output byte ---------------------
  1207. Parameters:
  1208.   * eax = 20 - function number
  1209.   * ebx = 2 - subfunction number
  1210.   * cl = byte for output
  1211. Returned value (is the same for both subfunctions):
  1212.   * eax = 0 - success
  1213.   * eax = 1 - base port is not defined
  1214. Remarks:
  1215.   * Previously the base port must be defined by
  1216.     subfunction 1 of function 21.
  1217.  
  1218. ======================================================================
  1219. ======== Function 21, subfunction 1 - set MPU MIDI base port. ========
  1220. ======================================================================
  1221. Parameters:
  1222.   * eax = 21 - function number
  1223.   * ebx = 1 - subfunction number
  1224.   * ecx = number of base port
  1225. Returned value
  1226.   * eax = 0 - success
  1227.   * eax = -1 - erratic number of a port
  1228. Remarks:
  1229.   * Number of a port must satisfy to conditions 0x100<=ecx<=0xFFFF.
  1230.   * The installation of base is necessary for function 20.
  1231.   * To get base port use subfunction 1 of function 26.
  1232.  
  1233. ======================================================================
  1234. ========== Function 21, subfunction 2 - set keyboard layout. =========
  1235. ======================================================================
  1236. Keyboard layout is used to convert keyboard scancodes to ASCII-codes,
  1237. which will be read by function 2.
  1238. Parameters:
  1239.   * eax = 21 - function number
  1240.   * ebx = 2 - subfunction number
  1241.   * ecx = which layout to set:
  1242.     * 1 = normal layout
  1243.     * 2 = layout at pressed Shift
  1244.     * 3 = layout at pressed Alt
  1245.   * edx = pointer to layout - table of length 128 bytes
  1246. Or:
  1247.   * ecx = 9
  1248.   * dx = country identifier (1=eng, 2=fi, 3=ger, 4=rus)
  1249. Returned value:
  1250.   * eax = 0 - success
  1251.   * eax = 1 - incorrect parameter
  1252. Remarks:
  1253.   * If Alt is pressed, the layout with Alt is used;
  1254.     if Alt is not pressed, but Shift is pressed,
  1255.     the layout with Shift is used;
  1256.     if Alt and Shift are not pressed, but Ctrl is pressed, the normal
  1257.     layout is used and then from the code is subtracted 0x60;
  1258.     if no control key is pressed, the normal layout is used.
  1259.   * To get layout and country identifier use
  1260.     subfunction 2 of function 26.
  1261.   * Country identifier is global system variable, which is not used
  1262.     by the kernel itself; however the application '@taskbar' displays
  1263.     the corresponding icon.
  1264.   * The application @taskbar switches layouts on user request.
  1265.  
  1266. ======================================================================
  1267. ========== Function 21, subfunction 5 - set system language. =========
  1268. ======================================================================
  1269. Parameters:
  1270.   * eax = 21 - function number
  1271.   * ebx = 5 - subfunction number
  1272.   * ecx = system language (1=eng, 2=fi, 3=ger, 4=rus)
  1273. Returned value:
  1274.   * eax = 0
  1275. Remarks:
  1276.   * System language is global system variable and is not used
  1277.     by the kernel itself, however application @taskbar draws the
  1278.     appropriate icon.
  1279.   * Function does not check for correctness, as the kernel does not
  1280.     use this variable.
  1281.   * To get system language use subfunction 5 of function 26.
  1282.  
  1283. ======================================================================
  1284.  Function 21, subfunction 11 - enable/disable low-level access to HD.
  1285. ======================================================================
  1286. Parameters:
  1287.   * eax = 21 - function number
  1288.   * ebx = 11 - subfunction number
  1289.   * ecx = 0/1 - disable/enable
  1290. Returned value:
  1291.   * eax = 0
  1292. Remarks:
  1293.   * Is used in LBA-read (subfunction 8 of function 58).
  1294.   * The current implementation uses only low bit of ecx.
  1295.   * To get current status use subfunction 11 of function 26.
  1296.  
  1297. ======================================================================
  1298.  Function 21, subfunction 12 - enable/disable low-level access to PCI.
  1299. ======================================================================
  1300. Parameters:
  1301.   * eax = 21 - function number
  1302.   * ebx = 12 - subfunction number
  1303.   * ecx = 0/1 - disable/enable
  1304. Returned value:
  1305.   * eax = 0
  1306. Remarks:
  1307.   * Is used in operations with PCI bus (function 62).
  1308.   * The current implementation uses only low bit of ecx.
  1309.   * To get current status use subfunction 12 of function 26.
  1310.  
  1311. ======================================================================
  1312. ================= Function 22 - set system date/time. ================
  1313. ======================================================================
  1314. Parameters:
  1315.   * eax = 22 - function number
  1316.   * ebx = 0 - set time
  1317.     * ecx = 0x00SSMMHH - time in the binary-decimal code (BCD):
  1318.     * HH=hour 00..23
  1319.     * MM=minute 00..59
  1320.     * SS=second 00..59
  1321.   * ebx = 1 - set date
  1322.     * ecx = 0x00DDMMYY - date in the binary-decimal code (BCD):
  1323.     * DD=day 01..31
  1324.     * MM=month 01..12
  1325.     * YY=year 00..99
  1326.   * ebx = 2 - set day of week
  1327.     * ecx = 1 for Sunday, ..., 7 for Saturday
  1328.   * ebx = 3 - set alarm clock
  1329.     * ecx = 0x00SSMMHH
  1330. Returned value:
  1331.   * eax = 0 - success
  1332.   * eax = 1 - incorrect parameter
  1333.   * eax = 2 - CMOS-battery was unloaded
  1334. Remarks:
  1335.   * Value of installation of day of week seems to be doubtful,
  1336.     as it a little where is used
  1337.     (day of week can be calculated by date).
  1338.   * Alarm clock can be set on operation in the given time every day.
  1339.     But there is no existing system function to disable it.
  1340.   * Operation of alarm clock consists in generation IRQ8.
  1341.   * Generally CMOS supports for alarm clock set of value 0xFF
  1342.     as one of parameters and it means that the appropriate parameter
  1343.     is ignored. But current implementation does not allow this
  1344.     (will return 1).
  1345.   * Alarm clock is a global system resource; the set of
  1346.     an alarm clock cancels automatically the previous set.
  1347.     However, at moment no program uses it.
  1348.  
  1349. ======================================================================
  1350. ============= Function 23 - wait for event with timeout. =============
  1351. ======================================================================
  1352. If the message queue is empty, waits for new message in the queue,
  1353. but no more than given time. Then reads out a message from the queue.
  1354.  
  1355. Parameters:
  1356.   * eax = 23 - function number
  1357.   * ebx = timeout (in 1/100 of second)
  1358. Returned value:
  1359.   * eax = 0 - the message queue is empty
  1360.   * otherwise eax = event (see the list of events)
  1361. Remarks:
  1362.   * Only those events are taken into account, which enter into
  1363.     the mask set by function 40. By default it is
  1364.     redraw, key and button events.
  1365.   * To check for presence of a message in the queue use function 11.
  1366.     To wait without timeout use function 10.
  1367.   * Transmission ebx=0 results in immediate returning eax=0.
  1368.   * Current implementation returns immediately with eax=0,
  1369.     if the addition of ebx with the current value of time counter
  1370.     makes 32-bit overflow.
  1371.  
  1372. ======================================================================
  1373. ======= Function 24, subfunction 4 - eject tray of disk drive. =======
  1374. ======================================================================
  1375. Parameters:
  1376.   * eax = 24 - function number
  1377.   * ebx = 4 - subfunction number
  1378.   * ecx = position of CD/DVD-drive
  1379.     from 0=Primary Master to 3=Secondary Slave for first IDE contr.
  1380.     from 4=Primary Master to 7=Secondary Slave for second IDE contr.
  1381.     from 8=Primary Master to 11=Secondary Slave for third IDE contr.
  1382. Returned value:
  1383.   * function does not return value
  1384. Remarks:
  1385.   * The function is supported only for ATAPI devices (CD and DVD).
  1386.   * When the tray is being ejected,
  1387.     manual control of tray is unlocked.
  1388.   * When the tray is being ejected, the code clears the cache for
  1389.     corresponding device.
  1390.   * An example of usage of the function is the application CD_tray.
  1391.  
  1392. ======================================================================
  1393. ======== Function 24, subfunction 5 - load tray of disk drive. =======
  1394. ======================================================================
  1395. Parameters:
  1396.   * eax = 24 - function number
  1397.   * ebx = 5 - subfunction number
  1398.   * ecx = position of CD/DVD-drive
  1399.     from 0=Primary Master to 3=Secondary Slave for first IDE contr.
  1400.     from 4=Primary Master to 7=Secondary Slave for second IDE contr.
  1401.     from 8=Primary Master to 11=Secondary Slave for third IDE contr.
  1402. Returned value:
  1403.   * function does not return value
  1404. Remarks:
  1405.   * The function is supported only for ATAPI devices (CD and DVD).
  1406.   * An example of usage of the function is the application CD_tray.
  1407.  
  1408. ======================================================================
  1409. ======= Function 25 - put image area on the background layer. ========
  1410. ======================================================================
  1411. Paramters:
  1412.   * eax = 25 - function number
  1413.   * ebx = pointer to the previously allocated memory area,
  1414.         where placed the source images in a format BBGGRRTTBBGGRRTT...
  1415.   * ecx = [size on axis x]*65536 + [size on axis y]
  1416.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  1417. Returned value:
  1418.   * function does not return value
  1419. Remarks:
  1420.   * Coordinates of the image are coordinates of the upper left corner
  1421.     of the image relative to the screen.
  1422.   * Size of the image in bytes is 4*xsize*ysize
  1423.   * TT - byte pointer of transparency, at current version:
  1424.          1 to FF - opaque, 0 - transparent.
  1425.   * The function places the image directly to LFB. It is not for
  1426.     background image f.15. Options f.15 to f.25 does not make sense.
  1427.  
  1428. ======================================================================
  1429. ======== Function 26, subfunction 1 - get MPU MIDI base port. ========
  1430. ======================================================================
  1431. Parameters:
  1432.   * eax = 26 - function number
  1433.   * ebx = 1 - subfunction number
  1434. Returned value:
  1435.   * eax = port number
  1436. Parameters:
  1437.   * To set base port use subfunction 1 of function 21.
  1438.  
  1439. ======================================================================
  1440. ========== Function 26, subfunction 2 - get keyboard layout. =========
  1441. ======================================================================
  1442. The keyboard layout is used to convert keyboard scancodes to
  1443. ASCII-codes for function 2.
  1444. Parameters:
  1445.   * eax = 26 - function number
  1446.   * ebx = 2 - subfunction number
  1447.   * ecx = what layout to get:
  1448.     * 1 = normal layout
  1449.     * 2 = layout with pressed Shift
  1450.     * 3 = layout with pressed Alt
  1451.   * edx = pointer to the 128-bytes buffer, where the layout will be
  1452.     copied
  1453. Returned value:
  1454.   * function does not return value
  1455. Or:
  1456.   * eax = 26 - function number
  1457.   * ebx = 2 - subfunction number
  1458.   * ecx = 9
  1459. Returned value:
  1460.   * eax = country identifier (1=eng, 2=fi, 3=ger, 4=rus)
  1461. Remarks:
  1462.   * If Alt is pressed, the layout with Alt is used;
  1463.     if Alt is not pressed, but Shift is pressed,
  1464.     the layout with Shift is used;
  1465.     if Alt and Shift are not pressed, but Ctrl is pressed, the normal
  1466.     layout is used and then from the code is subtracted 0x60;
  1467.     if no control key is pressed, the normal layout is used.
  1468.   * To set layout and country identifier use
  1469.     subfunction 2 of function 21.
  1470.   * Country identifier is global system variable, which is not used
  1471.     by the kernel itself; however the application '@taskbar' displays
  1472.     the corresponding icon (using this function).
  1473.   * The application @taskbar switches layouts on user request.
  1474.  
  1475. ======================================================================
  1476. ========== Function 26, subfunction 5 - get system language. =========
  1477. ======================================================================
  1478. Parameters:
  1479.   * eax = 26 - function number
  1480.   * ebx = 5 - subfunction number
  1481. Returned value:
  1482.   * eax = system language (1=eng, 2=fi, 3=ger, 4=rus)
  1483. Remarks:
  1484.   * System language is global system variable and is not used
  1485.     by the kernel itself, however application @taskbar draws the
  1486.     appropriate icon (using this function).
  1487.   * To set system language use subfunction 5 of function 21.
  1488.  
  1489. ======================================================================
  1490. === Function 26, subfunction 9 - get the value of the time counter. ==
  1491. ======================================================================
  1492. Parameters:
  1493.   * eax = 26 - function number
  1494.   * ebx = 9 - subfunction number
  1495. Returned value:
  1496.   * eax = number of 1/100s of second, past from the system boot time
  1497. Remarks:
  1498.   * Counter takes modulo 2^32, that correspond to a little more
  1499.     than 497 days.
  1500.   * To get system time use function 3.  
  1501.  
  1502. ======================================================================
  1503. ===================== Function 26, subfunction 10 ====================
  1504. ========== Get the value of the high precision time counter. =========
  1505. ======================================================================
  1506. Parameters:
  1507.   * eax = 26 - function number
  1508.   * ebx = 10 - subfunction number
  1509. Returned value:
  1510.   * eax = number of nanoseconds since system boot time (lower DWORD)
  1511.   * edx = number of nanoseconds since system boot time (high DWORD)  
  1512. Remarks:
  1513.   * The counter is based on HPET, if HPET is not available, resolution
  1514.     will be reduced to 10 000 000 nanoseconds.
  1515.  
  1516. ======================================================================
  1517. ===================== Function 26, subfunction 11 ====================
  1518. ========== Find out whether low-level HD access is enabled. ==========
  1519. ======================================================================
  1520. Parameters:
  1521.   * eax = 26 - function number
  1522.   * ebx = 11 - subfunction number
  1523. Returned value:
  1524.   * eax = 0/1 - disabled/enabled
  1525. Remarks:
  1526.   * Is used in LBA read (subfunction 8 of function 58).
  1527.   * To set current state use subfunction 11 of function 21.
  1528.  
  1529. ======================================================================
  1530. ===================== Function 26, subfunction 12 ====================
  1531. ========== Find out whether low-level PCI access is enabled. =========
  1532. ======================================================================
  1533. Parameters:
  1534.   * eax = 26 - function number
  1535.   * ebx = 12 - subfunction number
  1536. Returned value:
  1537.   * eax = 0/1 - disabled/enabled
  1538. Remarks:
  1539.   * Is used by operations with PCI bus (function 62).
  1540.   * The current implementation uses only low bit of ecx.
  1541.   * To set the current state use subfunction 12 of function 21.
  1542.  
  1543. ======================================================================
  1544. =================== Function 29 - get system date. ===================
  1545. ======================================================================
  1546. Parameters:
  1547.   * eax = 29 - function number
  1548. Returned value:
  1549.   * eax = 0x00DDMMYY, where
  1550.     (binary-decimal coding, BCD, is used)
  1551.   * YY = two low digits of year (00..99)
  1552.   * MM = month (01..12)
  1553.   * DD = day (01..31)
  1554. Remarks:
  1555.   * To set system date use function 22.
  1556.  
  1557. ======================================================================
  1558. ============= Function 30 - work with the current folder. ============
  1559. ======================================================================
  1560.  
  1561. --------- Subfunction 1 - set current folder for the thread. ---------
  1562. Parameters:
  1563.   * eax = 30 - function number
  1564.   * ebx = 1 - subfunction number
  1565.   * ecx = pointer to ASCIIZ-string with the path to new current folder
  1566. Returned value:
  1567.   * function does not return value
  1568.  
  1569. --------- Subfunction 2 - get current folder for the thread. ---------
  1570. Parameters:
  1571.   * eax = 30 - function number
  1572.   * ebx = 2 - subfunction number
  1573.   * ecx = pointer to buffer
  1574.   * edx = size of buffer
  1575. Returned value:
  1576.   * eax = size of the current folder's name (including terminating 0)
  1577. Remarks:
  1578.   * If the buffer is too small to hold all data, only first (edx-1)
  1579.     bytes are copied and than terminating 0 is inserted.
  1580.   * By default, current folder for the thread is "/rd/1".
  1581.   * At process/thread creation the current folder will be inherited
  1582.     from the parent.
  1583.  
  1584. --- Subfunction 3 - install the add.system directory for the kernel --
  1585. Parameters:
  1586.   * eax = 30 - function number
  1587.   * ebx = 3 - subfunction number
  1588.   * ecx = pointer to a block of data:
  1589.           sysdir_name     rb 64
  1590.           sysdir_path     rb 64
  1591. For example:
  1592. dir_name1       db 'KolibriOS',0
  1593.                 rb 64-10
  1594. dir_path1       db 'HD0/1',0
  1595.                 rb 64-6
  1596. Returned value:
  1597.   * function does not return value
  1598. Remarks:
  1599.   * The function can be called only 1 time for 1 session of the OS.
  1600.  
  1601. ======================================================================
  1602. ========= Function 34 - who owner the pixel on the screen. ===========
  1603. ======================================================================
  1604. Parameters:
  1605.   * eax = 34 - function number
  1606.   * ebx = x-coordinate (relative to the display)
  1607.   * ecx = y-coordinate (relative to the display)
  1608.  
  1609. Returned value:
  1610.   * eax = 0x000000XX - owner of pixel the slot window N
  1611.     If incorrect values ebx and ecx then function returns 0
  1612.   * The function takes the value from the area [_WinMapAddress]
  1613.  
  1614. ======================================================================
  1615. ======= Function 35 - read the color of a pixel on the screen. =======
  1616. ======================================================================
  1617. Parameters:
  1618.   * eax = 35
  1619.   * ebx = y*xsize+x, where
  1620.   * (x,y) = coordinates of a pixel (beginning from 0)
  1621.   * xsize = horizontal screen size
  1622. Returned value:
  1623.   * eax = color 0x00RRGGBB
  1624. Remarks:
  1625.   * To get screen sizes use function 14. Pay attention,
  1626.     that it subtracts 1 from both sizes.
  1627.   * There is also direct access (without any system calls)
  1628.     to videomemory through the selector gs. To get parameters of
  1629.     the current videomode, use function 61.
  1630.  
  1631. ======================================================================
  1632. =================== Function 36 - read screen area. ==================
  1633. ======================================================================
  1634. Paramters:
  1635.   * eax = 36 - function number
  1636.   * ebx = pointer to the previously allocated memory area,
  1637.         where will be placed the image in the format BBGGRRBBGGRR...
  1638.   * ecx = [size on axis x]*65536 + [size on axis y]
  1639.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  1640. Returned value:
  1641.   * function does not return value
  1642. Remarks:
  1643.   * Coordinates of the image are coordinates of the upper left corner
  1644.     of the image relative to the screen.
  1645.   * Size of the image in bytes is 3*xsize*ysize.
  1646.  
  1647. ======================================================================
  1648. =================== Function 37 - work with mouse. ===================
  1649. ======================================================================
  1650.  
  1651. ---------- Subfunction 0 - screen coordinates of the mouse -----------
  1652. Parameters:
  1653.   * eax = 37 - function number
  1654.   * ebx = 0 - subfunction number
  1655. Returned value:
  1656.   * eax = x*65536 + y, (x,y)=coordinates of the mouse pointer
  1657.     (beginning from 0)
  1658.  
  1659. -- Subfunction 1 - coordinates of the mouse relative to the window ---
  1660. Parameters:
  1661.   * eax = 37 - function number
  1662.   * ebx = 1 - subfunction number
  1663. Returned value:
  1664.   * eax = x*65536 + y, (x,y)=coordinates of the mouse pointer
  1665.     relative to the application window (beginning from 0)
  1666. Remarks:
  1667.   * The value is calculated by formula (x-xwnd)*65536 + (y-ywnd).
  1668.     If y>=ywnd, the low word is non-negative and contains
  1669.     relative y-coordinate, and the high word - relative x-coordinate
  1670.     (with correct sign). Otherwise the low word is negative and still
  1671.     contains relative y-coordinate, and to the high word
  1672.     1 should be added.
  1673.  
  1674. ------------- Subfunction 2 - states of the mouse buttons ------------
  1675. Parameters:
  1676.   * eax = 37 - function number
  1677.   * ebx = 2 - subfunction number
  1678. Returned value:
  1679.   * eax = bits 0-4 equal to subfunction 3
  1680.  
  1681. ------- Subfunction 3 - states and events of the mouse buttons -------
  1682. Parameters:
  1683.   * eax = 37 - function number
  1684.   * ebx = 3 - subfunction number
  1685. Returned value:
  1686.   * eax contains next information:
  1687.  
  1688. states:
  1689.   * bit 0 is set = left button is held
  1690.   * bit 1 is set = right button is held
  1691.   * bit 2 is set = middle button is held
  1692.   * bit 3 is set = 4th button is held
  1693.   * bit 4 is set = 5th button is held
  1694.  
  1695. events:
  1696.   * bit 8 is set = left button is pressed
  1697.   * bit 9 is set = right button is pressed
  1698.   * bit 10 is set = middle button is pressed
  1699.  
  1700.   * bit 15 is set = vertical scroll is used
  1701.  
  1702.   * bit 16 is set = left button is released
  1703.   * bit 17 is set = right button is released
  1704.   * bit 18 is set = middle button is released
  1705.  
  1706.   * bit 23 is set = horisontal scroll is used
  1707.  
  1708.   * bit 24 is set = doubleclick by left button
  1709.  
  1710. -------------------- Subfunction 4 - load cursor ---------------------
  1711. Parameters:
  1712.   * eax = 37 - function number
  1713.   * ebx = 4 - subfunction number
  1714.   * dx = data source:
  1715.   * dx = LOAD_FROM_FILE = 0 - data in a file
  1716.     * ecx = pointer to full path to the cursor file
  1717.     * the file must be in the format .cur, which is standard for
  1718.       MS Windows, at that of the size 32*32 pixels
  1719.   * dx = LOAD_FROM_MEM = 1 - data of file are already loaded in memory
  1720.     * ecx = pointer to data of the cursor file
  1721.     * the data format is the same as in the previous case
  1722.   * dx = LOAD_INDIRECT = 2 - data in memory
  1723.     * ecx = pointer to cursor image in the format ARGB 32*32 pixels
  1724.     * edx = 0xXXYY0002, where
  1725.       * XX = x-coordinate of cursor hotspot
  1726.       * YY = y-coordinate
  1727.       * 0 <= XX, YY <= 31
  1728. Returned value:
  1729.   * eax = 0 - failed
  1730.   * otherwise eax = cursor handle
  1731.  
  1732. --------------------- Subfunction 5 - set cursor ---------------------
  1733. Sets new cursor for the window of the current thread.
  1734. Parameters:
  1735.   * eax = 37 - function number
  1736.   * ebx = 5 - subfunction number
  1737.   * ecx = cursor handle
  1738. Returned value:
  1739.   * eax = handle of previous cursor
  1740. Remarks:
  1741.   * If the handle is incorrect, the function restores the default
  1742.     cursor (standard arrow). In particular, ecx=0 restores it.
  1743.  
  1744. ------------------- Subfunction 6 - delete cursor --------------------
  1745. Parameters:
  1746.   * eax = 37 - function number
  1747.   * ebx = 6 - subfunction number
  1748.   * ecx = cursor handle
  1749. Returned value:
  1750.   * eax destroyed
  1751. Remarks:
  1752.   * The cursor must be loaded previously by the current thread
  1753.     (with the call to subfunction 4). The function does not delete
  1754.     system cursors and cursors, loaded by another applications.
  1755.   * If the active cursor (set by subfunction 5) is deleted,
  1756.     the system restores the default cursor (standard arrow).
  1757.  
  1758. ------------------ Subfunction 7 - get scroll data -------------------
  1759. Parameters:
  1760.   * eax = 37 - function number
  1761.   * ebx = 7 - subfunction number
  1762. Returned value:
  1763.   * eax = [horizontal offset]*65536 + [vertical offset]
  1764. Remarks:
  1765.   * Scroll data is available for active window only.
  1766.   * Values are zeroed after reading.
  1767.   * Values are signed.
  1768.  
  1769. ======================================================================
  1770. ====================== Function 38 - draw line. ======================
  1771. ======================================================================
  1772. Parameters:
  1773.   * eax = 38 - function number
  1774.   * ebx = [start coordinate on axis x]*65536 +
  1775.               [end coordinate on axis x]
  1776.   * ecx = [start coordinate on axis y]*65536 +
  1777.               [end coordinate on axis y]
  1778.   * edx = 0x00RRGGBB - color
  1779.     edx = 0x01xxxxxx - draw inversed line
  1780.           (low 24 bits are ignored)
  1781. Returned value:
  1782.   * function does not return value
  1783. Remarks:
  1784.   * Coordinates are relative to the window.
  1785.   * End point is also drawn.
  1786.  
  1787. ======================================================================
  1788. == Function 39, subfunction 1 - get a size of the background image. ==
  1789. ======================================================================
  1790. Parameters:
  1791.   * eax = 39 - function number
  1792.   * ebx = 1 - subfunction number
  1793. Returned value:
  1794.   * eax = [width]*65536 + [height]
  1795. Remarks:
  1796.   * There is a pair function to set sizes of background image -
  1797.     subfunction 1 of function 15. After which it is necessary,
  1798.     of course, anew to define image.
  1799.  
  1800. ======================================================================
  1801. == Function 39, subfunction 2 - get pixel from the background image. =
  1802. ======================================================================
  1803. Parameters:
  1804.   * eax = 39 - function number
  1805.   * ebx = 2 - subfunction number
  1806.   * ecx = offset
  1807. Returned value:
  1808.   * eax = 0x00RRGGBB - pixel color, if offset is valid
  1809.     (less than 0x160000-16)
  1810.   * eax = 2 otherwise
  1811. Remarks:
  1812.   * Do not rely on returned value for invalid offsets, it may be
  1813.     changed in future kernel versions.
  1814.   * Offset for pixel with coordinates (x,y)
  1815.     is calculated as (x+y*xsize)*3.
  1816.   * There is a pair function to set pixel on the background image -
  1817.     subfunction 2 of function 15.
  1818.  
  1819. ======================================================================
  1820. == Function 39, subfunction 4 - get drawing mode for the background. =
  1821. ======================================================================
  1822. Parameters:
  1823.   * eax = 39 - function number
  1824.   * ebx = 4 - subfunction number
  1825. Returned value:
  1826.   * eax = 1 - tile
  1827.   * eax = 2 - stretch
  1828. Remarks:
  1829.   * There is a pair function to set drawing mode -
  1830.     subfunction 4 of function 15.
  1831.  
  1832. ======================================================================
  1833. =========== Function 40 - set the mask for expected events. ==========
  1834. ======================================================================
  1835. The mask for expected events affects function working with events
  1836. 10, 11, 23 - they notify only about events allowed by this mask.
  1837. Parameters:
  1838.   * eax = 40 - function number
  1839.   * ebx = mask: bit i corresponds to event i+1 (see list of events)
  1840.     (set bit permits notice on event)
  1841.     bit 31: mouse active/inactive filter
  1842.     bit 31 = 0 - inactive window receive mouse events
  1843.     bit 31 = 1 - inactive window does not receive mouse events
  1844.     bit 30: cursor position filter
  1845.     bit 30 = 0 = the window receive mouse events if cursor
  1846.                  outside window
  1847.     bit 30 = 1 - the window does not receive mouse events if cursor
  1848.                  outside window
  1849. Returned value:
  1850.   * eax = previous value of mask
  1851. Remarks:
  1852.   * Default mask (7=111b) enables nofices about redraw,
  1853.     keys and buttons. This is enough for many applications.
  1854.   * Events prohibited in the mask are saved anyway, when come;
  1855.     they are simply not informed with event functions.
  1856.   * Event functions take into account the mask on moment of
  1857.     function call, not on moment of event arrival.
  1858.  
  1859.  
  1860. ======================================================================
  1861. ================ Function 43 - input/output to a port. ===============
  1862. ======================================================================
  1863.  
  1864. ------------------------ Output data to port -------------------------
  1865. Parameters:
  1866.   * eax = 43 - function number
  1867.   * bl = byte for output
  1868.   * ecx = port number 0xnnnn (from 0 to 0xFFFF)
  1869. Returned value:
  1870.   * eax = 0 - success
  1871.   * eax = 1 - the thread has not reserved the selected port
  1872.  
  1873. ------------------------ Input data from port ------------------------
  1874. Parameters:
  1875.   * eax = 43 - function number
  1876.   * ebx is ignored
  1877.   * ecx = 0x8000nnnn, where nnnn = port number (from 0 to 0xFFFF)
  1878. Returned value:
  1879.   * eax = 0 - success, thus ebx = entered byte
  1880.   * eax = 1 - the thread has not reserved the selected port
  1881. Remarks:
  1882.   * Previously the thread must reserve the selected port
  1883.     for itself by function 46.
  1884.   * Instead of call to this function it is better to use
  1885.     processor instructions in/out - this is much
  1886.     faster and a bit shorter and easier.
  1887.  
  1888.  
  1889. ======================================================================
  1890. ====== Function 46 - reserve/free a group of input/output ports. =====
  1891. ======================================================================
  1892. To work with reserved ports an application can access directly by
  1893. commands in/out (recommended way) and can use function 43
  1894. (not recommended way).
  1895. Parameters:
  1896.   * eax = 46 - function number
  1897.   * ebx = 0 - reserve, 1 - free
  1898.   * ecx = start port number
  1899.   * edx = end port number (inclusive)
  1900. Returned value:
  1901.   * eax = 0 - success
  1902.   * eax = 1 - error
  1903. Remarks:
  1904.   * For ports reservation: an error occurs if and only if
  1905.     one from the following condition satisfies:
  1906.     * start port is more than end port;
  1907.     * the selected range contains incorrect port number
  1908.       (correct are from 0 to 0xFFFF);
  1909.     * limit for the total number of reserved areas is exceeded
  1910.       (maximum 255 are allowed);
  1911.     * the selected range intersects with any of earlier reserved
  1912.   * For ports free: an error is an attempt to free range,
  1913.     that was not earlier reserved by this function
  1914.     (with same ecx,edx).
  1915.   * If an error occurs (for both cases) function performs no action.
  1916.   * At booting the system reserves for itself ports
  1917.     0..0x2d, 0x30..0x4d, 0x50..0xdf, 0xe5..0xff (inclusively).
  1918.   * When a thread terminates, all reserved by it ports
  1919.     are freed automatically.
  1920.  
  1921. ======================================================================
  1922. ============= Function 47 - draw a number in the window. =============
  1923. ======================================================================
  1924. Parameters:
  1925.   * eax = 47 - function number
  1926.   * ebx = parameters of conversion number to text:
  1927.     * bl = 0 - ecx contains number
  1928.     * bl = 1 - ecx contains pointer to dword/qword-number
  1929.     * bh = 0 - display in decimal number system
  1930.     * bh = 1 - display in hexadecimal system
  1931.     * bh = 2 - display in binary system
  1932.     * bits 16-21 = how many digits to display
  1933.     * bits 22-29 reserved and must be set to 0
  1934.     * bit 30 set = display qword (64-bit) number (must be bl=1)
  1935.     * bit 31 set = do not display leading zeroes of the number
  1936.   * ecx = number (if bl=0) or pointer (if bl=1)
  1937.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  1938.   * esi = 0xX0RRGGBB:
  1939.     * RR, GG, BB specify the color
  1940.     * X = ABnn (bits)
  1941.     * nn = font (0/1)
  1942.     * A is ignored
  1943.     * B=1 - fill background with the color edi
  1944. Returned value:
  1945.   * function does not return value
  1946. Remarks:
  1947.   * The given length must not exceed 60.
  1948.   * The exactly given amount of digits is output. If number is small
  1949.     and can be written by smaller amount of digits, it is supplemented
  1950.     by leading zeroes; if the number is big and can not be written by
  1951.     given amount of digits, extra digits are not drawn.
  1952.   * Parameters of fonts are shown in the description of function 4
  1953.     (text output).
  1954.  
  1955. ======================================================================
  1956. ========= Function 48, subfunction 0 - apply screen settings. ========
  1957. ======================================================================
  1958. Parameters:
  1959.   * eax = 48 - function number
  1960.   * ebx = 0 - subfunction number
  1961.   * ecx = 0 - reserved
  1962. Returned value:
  1963.   * function does not return value
  1964. Remarks:
  1965.   * Function redraws the screen after parameters change by
  1966.     subfunctions 1 and 2.
  1967.   * Function call without prior call to one of indicated subfunctions
  1968.     is ignored.
  1969.   * Function call with nonzero ecx is ignored.
  1970.  
  1971. ======================================================================
  1972. =========== Function 48, subfunction 1 - set button style. ===========
  1973. ======================================================================
  1974. Parameters:
  1975.   * eax = 48 - function number
  1976.   * ebx = 1 - subfunction number
  1977.   * ecx = button style:
  1978.     * 0 = flat
  1979.     * 1 = 3d
  1980. Returned value:
  1981.   * function does not return value
  1982. Remarks:
  1983.   * After call to this function one should redraw the screen by
  1984.     subfunction 0.
  1985.   * Button style influences only to their draw of function 8.
  1986.  
  1987. ======================================================================
  1988. ====== Function 48, subfunction 2 - set standard window colors. ======
  1989. ======================================================================
  1990. Parameters:
  1991.   * eax = 48 - function number
  1992.   * ebx = 2 - subfunction number
  1993.   * ecx = pointer to the color table
  1994.   * edx = size of the color table
  1995.     (must be 40 bytes for future compatibility)
  1996. Format of the color table is shown in description of subfunction 3.
  1997. Returned value:
  1998.   * function does not return value
  1999. Remarks:
  2000.   * After call to this function one should redraw the screen by
  2001.     subfunction 0.
  2002.   * Table of standard colors influences only to applications,
  2003.     which receive this table obviously (by subfunction 3)
  2004.     and use it (specifying colors from it to drawing functions).
  2005.   * Table of standard colors is included in skin and is installed
  2006.     anew with skin installation (by subfunction 8).
  2007.   * Color table can be viewed/changed interactively with
  2008.     the application 'desktop'.
  2009.  
  2010. ======================================================================
  2011. ====== Function 48, subfunction 3 - get standard window colors. ======
  2012. ======================================================================
  2013. Parameters:
  2014.   * eax = 48 - function number
  2015.   * ebx = 3 - subfunction number
  2016.   * ecx = pointer to the buffer with size edx bytes,
  2017.     where table will be written
  2018.   * edx = size of color table
  2019.     (must be 40 bytes for future compatibility)
  2020. Returned value:
  2021.   * function does not return value
  2022. Format of the color table:
  2023. each item is dword-value for color 0x00RRGGBB
  2024.   * +0: dword: frames - color of frame
  2025.   * +4: dword: grab - color of header
  2026.   * +8: dword: grab_button - color of button on header bar
  2027.   * +12 = +0xC: dword: grab_button_text - color of text on button
  2028.     on header bar
  2029.   * +16 = +0x10: dword: grab_text - color of text on header
  2030.   * +20 = +0x14: dword: work - color of working area
  2031.   * +24 = +0x18: dword: work_button - color of button in working area
  2032.   * +28 = +0x1C: dword: work_button_text - color of text on button
  2033.     in working area
  2034.   * +32 = +0x20: dword: work_text - color of text in working area
  2035.   * +36 = +0x24: dword: work_graph - color of graphics in working area
  2036. Remarks:
  2037.   * Structure of the color table is described in the standard
  2038.     include file 'macros.inc' as 'system_colors'; for example,
  2039.     it is possible to write:
  2040.         sc      system_colors           ; variable declaration
  2041.         ...                             ; somewhere one must call
  2042.                                         ; this function with ecx=sc
  2043.         mov     ecx, [sc.work_button_text]      ; read text color on
  2044.                                         ; buttin in working area
  2045.   * A program itself desides to use or not to use color table.
  2046.     For usage program must simply at calls to drawing functions select
  2047.     color taken from the table.
  2048.   * At change of the table of standard colors (by subfunction 2 with
  2049.     the subsequent application of changes by subfunction 0 or
  2050.     at skin set by subfunction 8) the system sends to all windows
  2051.     redraw message (the event with code 1).
  2052.   * Color table can be viewed/changed interactively with
  2053.     the application 'desktop'.
  2054.  
  2055. ======================================================================
  2056. ============ Function 48, subfunction 4 - get skin height. ===========
  2057. ======================================================================
  2058. Parameters:
  2059.   * eax = 48 - function number
  2060.   * ebx = 4 - subfunction number
  2061. Returned value:
  2062.   * eax = skin height
  2063. Remarks:
  2064.   * Skin height is defined as the height of a header
  2065.     of skinned windows.
  2066.   * See also general structure of window in the description
  2067.     of function 0.
  2068.  
  2069. ======================================================================
  2070. ======== Function 48, subfunction 5 - get screen working area. =======
  2071. ======================================================================
  2072. Parameters:
  2073.   * eax = 48 - function number
  2074.   * ebx = 5 - subfunction number
  2075. Returned value:
  2076.   * eax = [left]*65536 + [right]
  2077.   * ebx = [top]*65536 + [bottom]
  2078. Remarks:
  2079.   * The screen working area defines position and coordinates of
  2080.     a maximized window.
  2081.   * The screen working area in view of normal work is all screen
  2082.     without taskbar ('@taskbar' application).
  2083.   * (left,top) are coordinates of the left upper corner,
  2084.     (right,bottom) are coordinates of the right lower one.
  2085.     Thus the size of working area on x axis can be calculated by
  2086.     formula right-left+1, on y axis - by formula bottom-right+1.
  2087.   * See also function 14,
  2088.     to get sizes of all screen.
  2089.   * There is a pair function to set working area - subfunction 6.
  2090.  
  2091. ======================================================================
  2092. ======== Function 48, subfunction 6 - set screen working area. =======
  2093. ======================================================================
  2094. Parameters:
  2095.   * eax = 48 - function number
  2096.   * ebx = 6 - subfunction number
  2097.   * ecx = [left]*65536 + [right]
  2098.   * edx = [top]*65536 + [bottom]
  2099. Returned value:
  2100.   * function does not return value
  2101. Remarks:
  2102.   * The screen working area defines position and coordinates of
  2103.     a maximized window.
  2104.   * This function is used only by the application '@taskbar',
  2105.     which set working area to all screen without taskbar.
  2106.   * (left,top) are coordinates of the left upper corner,
  2107.     (right,bottom) are coordinates of the right lower one.
  2108.     Thus the size of working area on x axis can be calculated by
  2109.     formula right-left+1, on y axis - by formula bottom-right+1.
  2110.   * If 'left'>='right', x-coordinate of working area is not changed.
  2111.     If 'left'<0, 'left' will not be set. If 'right' is greater than or
  2112.     equal to screen width, 'right' will not be set.
  2113.     Similarly on y axis.
  2114.   * See also function 14,
  2115.     to get sizes of all screen.
  2116.   * There is a pair function to get working area - subfunction 5.
  2117.   * This function redraws the screen automatically,
  2118.     updating coordinates and sizes of maximized windows.
  2119.     The system sends to all windows redraw message (the event 1).
  2120.  
  2121. ======================================================================
  2122. =========== Function 48, subfunction 7 - get skin margins. ===========
  2123. ======================================================================
  2124. Returns the area of a header of a skinned window, intended for
  2125. a text of a header.
  2126. Parameters:
  2127.   * eax = 48 - function number
  2128.   * ebx = 7 - subfunction number
  2129. Returned value:
  2130.   * eax = [left]*65536 + [right]
  2131.   * ebx = [top]*65536 + [bottom]
  2132. Remarks:
  2133.   * An application decides itself to use or not to use this function.
  2134.   * It is recommended to take into account returned value
  2135.     of this function for choice of a place for drawing header text
  2136.     (by function 4) or a substitute of header text
  2137.     (at the discretion of an application).
  2138.  
  2139. ======================================================================
  2140. ============= Function 48, subfunction 8 - set used skin. ============
  2141. ======================================================================
  2142. Parameters:
  2143.   * eax = 48 - function number
  2144.   * ebx = 8 - subfunction number
  2145.   * ecx = pointer to filename of the skin
  2146. Returned value:
  2147.   * eax = 0 - success
  2148.   * otherwise eax = file system error code; if file does not
  2149.     contain valid skin, function returns error 3
  2150.     (unknown file system).
  2151. Remarks:
  2152.   * After successful skin loading the system sends to all windows
  2153.     redraw message (the event 1).
  2154.   * At booting the system reads skin from file 'default.skn'
  2155.     on ramdisk.
  2156.   * User can change the skin statically by creating hisself
  2157.     'default.skn' or dynamically with the application 'desktop'.
  2158.  
  2159. ======================================================================
  2160. ====== Function 48, subfunction 9 - get font smoothing setting. ======
  2161. ======================================================================
  2162. Parameters:
  2163.   * eax = 48 - function number
  2164.   * ebx = 9 - subfunction number
  2165. Returned value:
  2166.   * eax = 2 - subpixel, 1 - anti-aliasing, 0 - off
  2167.  
  2168. ======================================================================
  2169. ========== Function 48, subfunction 10 - set font smoothing. =========
  2170. ======================================================================
  2171. Parameters:
  2172.   * eax = 48 - function number
  2173.   * ebx = 10 - subfunction number
  2174.   * cl  = 2 - subpixel, 1 - anti-aliasing, 0 - off
  2175.  
  2176. ======================================================================
  2177. =========== Function 49 - Advanced Power Management (APM). ===========
  2178. ======================================================================
  2179. Parameters:
  2180.   * eax = 49 - function number
  2181.   * dx = number of the APM function
  2182.     (analogue of ax in APM specification)
  2183.   * bx, cx = parameters of the APM function
  2184. Returned value:
  2185.   * 16-bit registers ax, bx, cx, dx, si, di and carry flag CF
  2186.     are set according to the APM specification
  2187.   * high halves of 32-bit registers eax, ebx, ecx,
  2188.     edx, esi, edi are destroyed
  2189. Remarks:
  2190.   * APM 1.2 specification is described in the document
  2191.     "Advanced Power Management (APM) BIOS Specification"
  2192.     (Revision 1.2), available at
  2193.     http://www.microsoft.com/whdc/archive/amp_12.mspx;
  2194.     besides it is included in famous Interrupt List by Ralf Brown
  2195.     (http://www.pobox.com/~ralf/files.html,
  2196.     ftp://ftp.cs.cmu.edu/afs/cs/user/ralf/pub/).
  2197.  
  2198. ======================================================================
  2199. =================== Function 50 - set window shape. ==================
  2200. ======================================================================
  2201. Normal windows have rectangular shape. This function can give to
  2202. a window any shape. The shape is given by a set of points inside
  2203. the base rectangle belonging to a window. Position and coordinates
  2204. of the base rectangle are set by function 0
  2205. and changed by function 67.
  2206.  
  2207. --------------------------- Set shape data ---------------------------
  2208. Parameters:
  2209.   * eax = 50 - function number
  2210.   * ebx = 0 - subfunction number
  2211.   * ecx = pointer to shape data (array of bytes 0/1)
  2212. Returned value:
  2213.   * function does not return value
  2214.  
  2215. -------------------------- Set shape scale ---------------------------
  2216. Parameters:
  2217.   * eax = 50 - function number
  2218.   * ebx = 1 - subfunction number
  2219.   * ecx sets a scale: each byte of data defines
  2220.     (2^scale)*(2^scale) pixels
  2221. Returned value:
  2222.   * function does not return value
  2223. Remarks:
  2224.   * Default scale is 0 (scale factor is 1). If in the shape data
  2225.     one byte corresponds to one pixel, there is no necessity
  2226.     to set scale.
  2227.   * Let's designate xsize = window width (in pixels), ysize = height;
  2228.     pay attention, that they are one pixel more than defined by
  2229.     functions 0, 67.
  2230.   * On definition of scale xsize and ysize must be divisible
  2231.     on 2^scale.
  2232.   * Byte of data on offset 'a' must be 0/1 and defines belonging
  2233.     to a window of square with the side 2^scale (if scale=0,
  2234.     this is one pixel) and coordinates of the left upper corner
  2235.     (a mod (xsize shr scale), a div (xsize shr scale))
  2236.   * Data size: (xsize shr scale)*(ysize shr scale).
  2237.   * Data must be presented in the memory and not change
  2238.     after set of shape.
  2239.   * The system views the shape data at every window redraw by
  2240.     function 0.
  2241.   * The call of subfunction 0 with NULL pointer results in return
  2242.     to the rectangular shape.
  2243.  
  2244. ======================================================================
  2245. ==================== Function 51 - create thread. ====================
  2246. ======================================================================
  2247. Parameters:
  2248.   * eax = 51 - function number
  2249.   * ebx = 1 - unique subfunction
  2250.   * ecx = address of thread entry point (starting eip)
  2251.   * edx = pointer to thread stack (starting esp)
  2252. Returned value:
  2253.   * eax = -1 - error (there is too many threads)
  2254.   * otherwise eax = TID - thread identifier
  2255.     </UL>
  2256.  
  2257. ======================================================================
  2258. ==================== Function 54, subfunction 0 ======================
  2259. ============== Get the number of slots in the clipboard. =============
  2260. ======================================================================
  2261. Parameters:
  2262.   * eax = 54 - function number
  2263.   * ebx = 0 - subfunction number
  2264. Returned value:
  2265.   * eax = slots in the clipboard
  2266.   * eax = -1 - main list area not found
  2267.  
  2268. ======================================================================
  2269. ==================== Function 54, subfunction 1 ======================
  2270. ================= Read the data from the clipboard. ==================
  2271. ======================================================================
  2272. Parameters:
  2273.   * eax = 54 - function number
  2274.   * ebx = 1 - subfunction number
  2275.   * eсx = slot number
  2276. Returned value:
  2277.   * eax = if successful - pointer to a memory with data
  2278.   * eax = 1 - error
  2279.   * eax = -1 - main list area not found
  2280.  
  2281. ======================================================================
  2282. ==================== Function 54, subfunction 2 ======================
  2283. ================= Write the data to the clipboard. ===================
  2284. ======================================================================
  2285. Parameters:
  2286.   * eax = 54 - function number
  2287.   * ebx = 2 - subfunction number
  2288.   * eсx = the number of bytes to be copied
  2289.   * edx = a pointer to a buffer for data to be copied
  2290. Returned value:
  2291.   * eax = 0 - success
  2292.   * eax = 1 - error
  2293.   * eax = -1 - main list area not found
  2294.  
  2295. ======================================================================
  2296. ===================== Function 54, subfunction 3 =====================
  2297. ================ Delete the last slot in the clipboard ===============
  2298. ======================================================================
  2299. Parameters:
  2300.   * eax = 54 - function number
  2301.   * ebx = 3 - subfunction number
  2302. Returned value:
  2303.   * eax = 0 - success
  2304.   * eax = 1 - error
  2305.   * eax = -1 - main list area not found
  2306.  
  2307. ======================================================================
  2308. ===================== Function 54, subfunction 4 =====================
  2309. ===================== Alarm reset the lock buffer ====================
  2310. ======================================================================
  2311. Parameters:
  2312.   * eax = 54 - function number
  2313.   * ebx = 4 - subfunction number
  2314. Returned value:
  2315.   * eax = 0 - success
  2316.   * eax = -1 - main list area not found or no blocking
  2317. Remarks:
  2318.   * Used in exceptional cases, where no responsible or killed
  2319.     application blocked the clipboard operations.
  2320.  
  2321. ======================================================================
  2322.  Function 55, subfunction 55 - begin to play data on built-in speaker.
  2323. ======================================================================
  2324. Parameters:
  2325.   * eax = 55 - function number
  2326.   * ebx = 55 - subfunction number
  2327.   * esi = pointer to data
  2328. Returned value:
  2329.   * eax = 0 - success
  2330.   * eax = 55 - error (speaker is off or busy)
  2331. Data is an array of items with variable length.
  2332. Format of each item is defined by first byte:
  2333.   * 0 = end of data
  2334.   * 1..0x80 = sets sound duration on 1/100 of second; sound note
  2335.     is defined by immediate value of frequency
  2336.     * following word (2 bytes) contains frequency divider;
  2337.       frequency is defined as 1193180/divider
  2338.   * 0x81 = invalid
  2339.   * 0x82..0xFF = note is defined by octave and number:
  2340.     * duration in 1/100 of second = (first byte)-0x81
  2341.     * there is one more byte;
  2342.     * (second byte)=0xFF - delay
  2343.     * otherwise it looks like a*0x10+b, where b=number of the note in
  2344.       an octave from 1 to 12, a=number of octave (beginning from 0)
  2345. Remarks:
  2346.   * Speaker play can be disabled/enabled by
  2347.     subfunction 8 of function 18.
  2348.   * Function returns control, having informed the system
  2349.     an information on request. Play itself goes independently from
  2350.     the program.
  2351.   * The data must be kept in the memory at least up to the end
  2352.     of play.
  2353.  
  2354. ======================================================================
  2355. ======================= Function 57 - PCI BIOS. ======================
  2356. ======================================================================
  2357. Parameters:
  2358.   * eax = 57 - function number
  2359.   * ebp corresponds to al in PCI BIOS specification
  2360.   * other registers are set according to PCI BIOS specification
  2361. Returned value:
  2362.   * CF is undefined
  2363.   * other registers are set according to PCI BIOS specification
  2364. Remarks:
  2365.   * Many effects of this function can be also achieved with
  2366.     corresponding subfunctions of function 62.
  2367.   * The function calls PCI32 BIOS extension, documented e.g. in
  2368.     http://alpha1.dyns.net/files/PCI/bios21.pdf.
  2369.   * If BIOS does not support this extension, its behavior is emulated
  2370.     (through kernel-mode analogues of subfunctions of function 62).
  2371.  
  2372. ======================================================================
  2373. ========== Function 60 - Inter Process Communication (IPC). ==========
  2374. ======================================================================
  2375. IPC is used for message dispatching from one process/thread to
  2376. another. Previously it is necessary to agree how to interpret
  2377. the concrete message.
  2378.  
  2379. ----------- Subfunction 1 - set the area for IPC receiving -----------
  2380. Is called by process-receiver.
  2381. Parameters:
  2382.   * eax = 60 - function number
  2383.   * ebx = 1 - subfunction number
  2384.   * ecx = pointer to the buffer
  2385.   * edx = size of the buffer
  2386. Returned value:
  2387.   * eax = 0 - always success
  2388. Format of IPC-buffer:
  2389.   * +0: dword: if nonzero, buffer is considered locked;
  2390.     lock/unlock the buffer, when you work with it and need that
  2391.     buffer data are not changed from outside (no new messages)
  2392.   * +4: dword: occupied place in the buffer (in bytes)
  2393.   * +8: first message
  2394.   * +8+n: second message
  2395.   * ...
  2396. Format of a message:
  2397.   * +0: dword: PID of sender
  2398.   * +4: dword: message length (not including this header)
  2399.   * +8: n*byte: message data
  2400.  
  2401. ------------------ Subfunction 2 - send IPC message ------------------
  2402. Is called by process-sender.
  2403. Parameters:
  2404.   * eax = 60 - function number
  2405.   * ebx = 2 - subfunction number
  2406.   * ecx = PID of receiver
  2407.   * edx = pointer to the message data
  2408.   * esi = message length (in bytes)
  2409. Returned value:
  2410.   * eax = 0 - success
  2411.   * eax = 1 - the receiver has not defined buffer for IPC messages
  2412.     (can be, still have no time,
  2413.     and can be, this is not right process)
  2414.   * eax = 2 - the receiver has blocked IPC-buffer; try to wait a bit
  2415.   * eax = 3 - overflow of IPC-buffer of the receiver
  2416.   * eax = 4 - process/thread with such PID does not exist
  2417. Remarks:
  2418.   * Immediately after writing of IPC-message to the buffer the system
  2419.     sends to the receiver the event with code 7 (see event codes).
  2420.  
  2421. ======================================================================
  2422. ==== Function 61 - get parameters for the direct graphics access. ====
  2423. ======================================================================
  2424. The data of the graphics screen (the memory area which displays
  2425. screen contents) are accessible to a program directly, without
  2426. any system calls, through the selector gs:
  2427.         mov     eax, [gs:0]
  2428. places in eax the first dword of the buffer, which contains
  2429. information on color of the left upper point (and, possibly, colors
  2430. of several following).
  2431.         mov     [gs:0], eax
  2432. by work in VESA modes with LFB sets color of the left upper point
  2433. (and, possibly, colors of several following).
  2434. To interpret the data of graphics screen program needs to know
  2435. some parameters, returning by this function.
  2436. Remarks:
  2437.   * Graphics parameters changes very seldom at work,
  2438.     namely, only in cases, when user works with the application VRR.
  2439.   * At videomode change the system redraws all windows (event
  2440.     with code 1) and redraws the background (event 5).
  2441.     Same events occur in other cases too, which meet much more often,
  2442.     than videomode change.
  2443.   * By operation in videomodes with LFB the selector gs points to
  2444.     LFB itself, so reading/writing on gs result directly in
  2445.     change of screen contents. By operation in videomodes without
  2446.     LFB gs points to some data area in the kernel, and all functions
  2447.     of screen output fulfil honesty double operation on writing
  2448.     directly to the screen and writing to this buffer. In result
  2449.     at reading contents of this buffer the results correspond to
  2450.     screen contents (with, generally speaking, large color
  2451.     resolution), and writing is ignored.
  2452.     One exception is the mode 320*200, for which main loop of the
  2453.     system thread updates the screen according to mouse movements.
  2454.  
  2455. ------------------------- Screen resolution --------------------------
  2456. Parameters:
  2457.   * eax = 61 - function number
  2458.   * ebx = 1 - subfunction number
  2459. Returned value:
  2460.   * eax = [resolution on x axis]*65536 + [resolution on y axis]
  2461. Remarks:
  2462.   * One can use function 14 paying attention that
  2463.     it returns sizes on 1 pixel less. It is fully equivalent way.
  2464.  
  2465. ---------------------- Number of bits per pixel ----------------------
  2466. Parameters:
  2467.   * eax = 61 - function number
  2468.   * ebx = 2 - subfunction number
  2469. Returned value:
  2470.   * eax = number of bits per pixel (24 or 32)
  2471.  
  2472. -------------------- Number of bytes per scanline --------------------
  2473. Parameters:
  2474.   * eax = 61 - function number
  2475.   * ebx = 3 - subfunction number
  2476. Returned value:
  2477.   * eax = number of bytes occupied by one scanline
  2478.     (horizontal line on the screen)
  2479.  
  2480. ======================================================================
  2481. ===== Function 62, subfunction 0 - get version of PCI-interface. =====
  2482. ======================================================================
  2483. Parameters:
  2484.   * eax = 62 - function number
  2485.   * bl = 0 - subfunction number
  2486. Returned value:
  2487.   * eax = -1 - PCI access is disabled; otherwise
  2488.   * ah.al = version of PCI-interface (ah=version, al=subversion)
  2489.   * high word of eax is zeroed
  2490. Remarks:
  2491.   * Previously low-level access to PCI for applications must be
  2492.     enabled by subfunction 12 of function 21.
  2493.   * If PCI BIOS is not supported, the value of ax is undefined.
  2494.  
  2495. ======================================================================
  2496. ==== Function 62, subfunction 1 - get number of the last PCI-bus. ====
  2497. ======================================================================
  2498. Parameters:
  2499.   * eax = 62 - function number
  2500.   * bl = 1 - subfunction number
  2501. Returned value:
  2502.   * eax = -1 - access to PCI is disabled; otherwise
  2503.   * al = number of the last PCI-bus; other bytes of eax are destroyed
  2504. Remarks:
  2505.   * Previously low-level access to PCI for applications must be
  2506.     enabled by subfunction 12 of function 21.
  2507.   * If PCI BIOS is not supported, the value of ax is undefined.
  2508.  
  2509. ======================================================================
  2510. ===================== Function 62, subfunction 2 =====================
  2511. ===== Get mechanism of addressing to the PCI configuration space. ====
  2512. ======================================================================
  2513. Parameters:
  2514.   * eax = 62 - function number
  2515.   * bl = 2 - subfunction number
  2516. Returned value:
  2517.   * eax = -1 - access to PCI is disabled; otherwise
  2518.   * al = mechanism (1 or 2); other bytes of eax are destroyed
  2519. Remarks:
  2520.   * Previously low-level access to PCI for applications must be
  2521.     enabled by subfunction 12 of function 21.
  2522.   * Addressing mechanism is selected depending on
  2523.     equipment characteristics.
  2524.   * Subfunctions of read and write work automatically
  2525.     with the selected mechanism.
  2526.  
  2527. ======================================================================
  2528. ======== Function 62, subfunctions 4,5,6 - read PCI-register. ========
  2529. ======================================================================
  2530. Parameters:
  2531.   * eax = 62 - function number
  2532.   * bl = 4 - read byte
  2533.   * bl = 5 - read word
  2534.   * bl = 6 - read dword
  2535.   * bh = number of PCI-bus
  2536.   * ch = dddddfff, where ddddd = number of the device on the bus,
  2537.     fff = function number of device
  2538.   * cl = number of register (must be even for bl=5,
  2539.     divisible by 4 for bl=6)
  2540. Returned value:
  2541.   * eax = -1 - error (access to PCI is disabled or parameters
  2542.     are not supported); otherwise
  2543.   * al/ax/eax (depending on requested size) contains the data;
  2544.     the other part of register eax is destroyed
  2545. Remarks:
  2546.   * Previously low-level access to PCI for applications must be
  2547.     enabled by subfunction 12 of function 21.
  2548.   * Access mechanism 2 supports only 16 devices on a bus and ignores
  2549.     function number. To get access mechanism use subfunction 2.
  2550.   * Some registers are standard and exist for all devices, some are
  2551.     defined by the concrete device. The list of registers of the
  2552.     first type can be found e.g. in famous
  2553.     Interrupt List by Ralf Brown
  2554.     (http://www.pobox.com/~ralf/files.html,
  2555.     ftp://ftp.cs.cmu.edu/afs/cs/user/ralf/pub/);
  2556.     registers of the second type must be listed
  2557.     in the device documentation.
  2558.  
  2559. ======================================================================
  2560. ====== Function 62, subfunctions 8,9,10 - write to PCI-register. =====
  2561. ======================================================================
  2562. Parameters:
  2563.   * eax = 62 - function number
  2564.   * bl = 8 - write byte
  2565.   * bl = 9 - write word
  2566.   * bl = 10 - write dword
  2567.   * bh = number of PCI-bus
  2568.   * ch = dddddfff, where ddddd = number of the device on the bus,
  2569.     fff = function number of device
  2570.   * cl = number of register (must be even for bl=9,
  2571.     divisible by 4 for bl=10)
  2572.   * dl/dx/edx (depending on requested size) contatins
  2573.     the data to write
  2574. Returned value:
  2575.   * eax = -1 - error (access to PCI is disabled or parameters
  2576.     are not supported)
  2577.   * eax = 0 - success
  2578. Remarks:
  2579.   * Previously low-level access to PCI for applications must be
  2580.     enabled by subfunction 12 of function 21.
  2581.   * Access mechanism 2 supports only 16 devices on a bus and ignores
  2582.     function number. To get access mechanism use subfunction 2.
  2583.   * Some registers are standard and exist for all devices, some are
  2584.     defined by the concrete device. The list of registers of the
  2585.     first type can be found e.g. in famous Interrupt List by
  2586.     Ralf Brown; registers of the second type must be listed
  2587.     in the device documentation.
  2588.  
  2589. ======================================================================
  2590. ============== Function 63 - work with the debug board. ==============
  2591. ======================================================================
  2592. The debug board is the global system buffer (with the size
  2593. 1024 bytes), to which any program can write (generally speaking,
  2594. arbitrary) data and from which other program can read these data.
  2595. By the agreement written data are text strings interpreted as
  2596. debug messages on a course of program execution. The kernel in
  2597. some situations also writes to the debug board information on
  2598. execution of some functions; by the agreement kernel messages
  2599. begins from the prefix "K : ".
  2600. For view of the debug board the application 'board' was created,
  2601. which reads data from the buffer and displays them in its window.
  2602. 'board' interpretes the sequence of codes 13,10 as newline.
  2603. A character with null code in an end of line is not necessary,
  2604. but also does not prevent.
  2605. Because debugger has been written, the value of the debug board
  2606. has decreased, as debugger allows to inspect completely a course of
  2607. program execution without any efforts from the direction of program
  2608. itself. Nevertheless in some cases the debug board is still useful.
  2609.  
  2610. ----------------------------- Write byte -----------------------------
  2611. Parameters:
  2612.   * eax = 63 - function number
  2613.   * ebx = 1 - subfunction number
  2614.   * cl = data byte
  2615. Returned value:
  2616.   * function does not return value
  2617. Remarks:
  2618.   * Byte is written to the buffer. Buffer size is 512 bytes.
  2619.     At buffer overflow all obtained data are lost.
  2620.   * For output to the debug board of more complicated objects
  2621.     (strings, numbers) it is enough to call this function in cycle.
  2622.     It is possible not to write the appropriate code manually and use
  2623.     file 'debug.inc', which is included into the distributive.
  2624.  
  2625. ----------------------------- Read byte ------------------------------
  2626. Takes away byte from the buffer.
  2627. Parameters:
  2628.   * eax = 63 - function number
  2629.   * ebx = 2 - subfunction number
  2630. Returned value:
  2631.   * eax = ebx = 0 - the buffer is empty
  2632.   * eax = byte, ebx = 1 - byte was successfully read
  2633.  
  2634. ======================================================================
  2635. ============== Function 64 - resize application memory. ==============
  2636. ======================================================================
  2637. Parameters:
  2638.   * eax = 64 - function number
  2639.   * ebx = 1 - unique subfunction
  2640.   * ecx = new memory size
  2641. Returned value:
  2642.   * eax = 0 - success
  2643.   * eax = 1 - not enough memory
  2644. Remarks:
  2645.   * There is another way to dynamically allocate/free memory -
  2646.     subfunctions 11, 12, 13 of function 68.
  2647.   * The function cannot be used together with 68.11, 68.12, 68.13.
  2648.     The function call will be ignored after creation of process heap
  2649.     with function 68.11.
  2650.  
  2651. ======================================================================
  2652. ======== Function 65 - draw image with palette in the window. ========
  2653. ======================================================================
  2654. Parameters:
  2655.   * eax = 65 - function number
  2656.   * ebx = pointer to the image
  2657.   * ecx = [size on axis x]*65536 + [size on axis y]
  2658.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  2659.   * esi = number of bits per pixel, must be 1,2,4,8,9,15,16,24 or 32;
  2660.   * edi = pointer to palette (2 to the power esi colors 0x00RRGGBB);
  2661.           ignored when esi > 8
  2662.   * ebp = offset of next row data relative to previous row data
  2663. Returned value:
  2664.   * function does not return value
  2665. Remarks:
  2666.   * Coordinates of the image are coordinates of the upper left corner
  2667.     of the image relative to the window.
  2668.   * Format of image with 1 bit per pixel: each byte of image
  2669.     (possibly excluding last bytes in rows), contains information on
  2670.     the color of 8 pixels, MSB corresponds to first pixel.
  2671.   * Format of image with 2 bits per pixel: each byte of image
  2672.     (possibly excluding last bytes in rows), contains information on
  2673.     the color of 4 pixels, two MSBs correspond to first pixel.
  2674.   * Format of image with 4 bits per pixel: each byte of image
  2675.     excluding last bytes in rows (if width is odd) contains
  2676.     information on the color of 2 pixels, high-order tetrad
  2677.     corresponds to first pixel.
  2678.   * Format of image with 8 bits per pixel: each byte of image is
  2679.     index in the palette.
  2680.   * Format of image with 9 bits per pixel: array of one byte values;
  2681.     each byte (8 bit) represents the intensity of gray for one pixel;
  2682.     this format is equal to 8bpp without palette.
  2683.   * Format of image with 15 bits per pixel: the color of each pixel
  2684.     is coded as (bit representation) 0RRRRRGGGGGBBBBB - 5 bits per
  2685.     each color.
  2686.   * Format of image with 16 bits per pixel: the color of each pixel
  2687.     is coded as RRRRRGGGGGGBBBBB (5+6+5).
  2688.   * Format of image with 24 bits per pixel: the color of each pixel
  2689.     is coded as 3 bytes - sequentially blue, green, red components.
  2690.   * Format of image with 32 bits per pixel: similar to 24, but
  2691.     one additional ignored byte is present.
  2692.   * The call to function 7 is equivalent to call to this function
  2693.     with esi=24, ebp=0.
  2694.  
  2695. ======================================================================
  2696. ================== Function 66 - work with keyboard. =================
  2697. ======================================================================
  2698. The input mode influences results of reading keys by function 2.
  2699. When a program loads, ASCII input mode is set for it.
  2700.  
  2701. -------------- Subfunction 1 - set keyboard input mode. --------------
  2702. Parameters:
  2703.   * eax = 66 - function number
  2704.   * ebx = 1 - subfunction number
  2705.   * ecx = mode:
  2706.     * 0 = normal (ASCII-characters)
  2707.     * 1 = scancodes
  2708. Returned value:
  2709.   * function does not return value
  2710.  
  2711. -------------- Subfunction 2 - get keyboard input mode. --------------
  2712. Parameters:
  2713.   * eax = 66 - function number
  2714.   * ebx = 2 - subfunction number
  2715. Returned value:
  2716.   * eax = current mode
  2717.  
  2718. ------------ Subfunction 3 - get status of control keys. -------------
  2719. Parameters:
  2720.   * eax = 66 - function number
  2721.   * ebx = 3 - subfunction number
  2722. Returned value:
  2723.   * eax = bit mask:
  2724.   * bit 0  (mask 1): left Shift is pressed
  2725.   * bit 1  (mask 2): right Shift is pressed
  2726.   * bit 2  (mask 4): left Ctrl is pressed
  2727.   * bit 3  (mask 8): right Ctrl is pressed
  2728.   * bit 4  (mask 0x10): left Alt is pressed
  2729.   * bit 5  (mask 0x20): right Alt is pressed
  2730.   * bit 6  (mask 0x40): CapsLock is on
  2731.   * bit 7  (mask 0x80): NumLock is on
  2732.   * bit 8  (mask 0x100): ScrollLock is on
  2733.   * bit 9  (mask 0x200): left Win is pressed
  2734.   * bit 10 (mask 0x400): right Win is pressed
  2735.   * other bits are cleared
  2736.  
  2737. -------------- Subfunction 4 - set system-wide hotkey. ---------------
  2738. When hotkey is pressed, the system notifies only those applications,
  2739. which have installed it; the active application (which receives
  2740. all normal input) does not receive such keys.
  2741. The notification consists in sending event with the code 2.
  2742. Reading hotkey is the same as reading normal key - by function 2.
  2743. Parameters:
  2744.   * eax = 66 - function number
  2745.   * ebx = 4 - subfunction number
  2746.   * cl determines key scancode;
  2747.     use cl=0 to give combinations such as Ctrl+Shift
  2748.   * edx = 0xXYZ determines possible states of control keys:
  2749.     * Z (low 4 bits) determines state of LShift and RShift:
  2750.       * 0 = no key must be pressed;
  2751.       * 1 = exactly one key must be pressed;
  2752.       * 2 = both keys must be pressed;
  2753.       * 3 = must be pressed LShift, but not RShift;
  2754.       * 4 = must be pressed RShift, but not LShift
  2755.     * Y - similar for LCtrl and RCtrl;
  2756.     * X - similar for LAlt and RAlt
  2757. Returned value:
  2758.   * eax=0 - success
  2759.   * eax=1 - too mant hotkeys (maximum 256 are allowed)
  2760. Remarks:
  2761.   * Hotkey can work either at pressing or at release. Release
  2762.     scancode of a key is more on 128 than pressing scancode
  2763.     (i.e. high bit is set).
  2764.   * Several applications can set the same combination;
  2765.     all such applications will be informed on pressing
  2766.     such combination.
  2767.  
  2768. -------------- Subfunction 5 - delete installed hotkey. --------------
  2769. Parameters:
  2770.   * eax = 66 - function number
  2771.   * ebx = 5 - subfunction number
  2772.   * cl = scancode of key and edx = 0xXYZ the same as in subfunction 4
  2773. Returned value:
  2774.   * eax = 0 - success
  2775.   * eax = 1 - there is no such hotkey
  2776. Remarks:
  2777.   * When a process/thread terminates, all hotkey installed by it are
  2778.     deleted.
  2779.   * The call to this subfunction does not affect other applications.
  2780.     If other application has defined the same combination, it will
  2781.     still receive notices.
  2782.  
  2783. --------------- Subfunction 6 - block the normal input. --------------
  2784. Parameters:
  2785.   * eax = 66 - function number
  2786.   * ebx = 6 - subfunction number
  2787. Returned value:
  2788.   * function does not return value
  2789. Remarks:
  2790.   * Blocking the normal keyboard input for installed hotkeys
  2791.   * To emulate a mouse via the keyboard, the application MOUSEMUL
  2792.  
  2793. ------------ Subfunction 7 - unlock the normal input. ----------------
  2794. Parameters:
  2795.   * eax = 66 - function number
  2796.   * ebx = 7 - subfunction number
  2797. Returned value:
  2798.   * function does not return value
  2799. Remarks:
  2800.   * Unlocking the results of the f. 66.6
  2801.   * To emulate a mouse via the keyboard, the application MOUSEMUL
  2802.  
  2803. ======================================================================
  2804. ========= Function 67 - change position/sizes of the window. =========
  2805. ======================================================================
  2806. Parameters:
  2807.   * eax = 67 - function number
  2808.   * ebx = new x-coordinate of the window
  2809.   * ecx = new y-coordinate of the window
  2810.   * edx = new x-size of the window
  2811.   * esi = new y-size of the window
  2812. Returned value:
  2813.   * function does not return value
  2814. Remarks:
  2815.   * The value -1 for a parameter means "do not change"; e.g. to move
  2816.     the window without resizing it is possible to specify edx=esi=-1.
  2817.   * Previously the window must be defined by function 0.
  2818.     It sets initial coordinates and sizes of the window.
  2819.   * Sizes of the window are understood in sense of function 0,
  2820.     that is one pixel less than real sizes.
  2821.   * The function call for maximized windows is simply ignored.
  2822.   * For windows of appropriate styles position and/or sizes can be
  2823.     changed by user; current position and sizes can be obtained by
  2824.     call to function 9.
  2825.   * The function sends to the window redraw event (with the code 1).
  2826.  
  2827. ======================================================================
  2828. ====== Function 68, subfunction 0 - get the task switch counter. =====
  2829. ======================================================================
  2830. Parameters:
  2831.   * eax = 68 - function number
  2832.   * ebx = 0 - subfunction number
  2833. Returned value:
  2834.   * eax = number of task switches from the system booting
  2835.     (modulo 2^32)
  2836.  
  2837. ======================================================================
  2838. ======= Function 68, subfunction 1 - switch to the next thread. ======
  2839. ======================================================================
  2840. The function completes the current time slice allocated to the
  2841. thread and switches to the next. (Which thread in which process
  2842. will be next, is unpredictable). Later, when execution queue
  2843. will reach the current thread, execution will be continued.
  2844. Parameters:
  2845.   * eax = 68 - function number
  2846.   * ebx = 1 - subfunction number
  2847. Returned value:
  2848.   * function does not return value
  2849.  
  2850. ======================================================================
  2851. ============= Function 68, subfunction 2 - cache + rdpmc. ============
  2852. ======================================================================
  2853. Parameters:
  2854.   * eax = 68 - function number
  2855.   * ebx = 2 - subfunction number
  2856.   * ecx = required action:
  2857.     * ecx = 0 - enable instruction 'rdpmc'
  2858.       (ReaD Performance-Monitoring Counters) for applications
  2859.     * ecx = 1 - find out whether cache is disabled/enabled
  2860.     * ecx = 2 - enable cache
  2861.     * ecx = 3 - disable cache
  2862. Returned value:
  2863.   * for ecx=0:
  2864.     * eax = the value of cr4
  2865.   * for ecx=1:
  2866.     * eax = (cr0 and 0x60000000):
  2867.     * eax = 0 - cache is on
  2868.     * eax <> 0 - cache is off
  2869.   * for ecx=2 and ecx=3:
  2870.     * function does not return value
  2871.  
  2872. ======================================================================
  2873. =========== Function 68, subfunction 3 - read MSR-register. ==========
  2874. ======================================================================
  2875. MSR = Model Specific Register; the complete list of MSR-registers
  2876. of a processor is included to the documentation on it (for example,
  2877. IA-32 Intel Architecture Software Developer's Manual,
  2878. Volume 3, Appendix B); each processor family has its own subset
  2879. of the MSR-registers.
  2880. Parameters:
  2881.   * eax = 68 - function number
  2882.   * ebx = 3 - subfunction number
  2883.   * ecx is ignored
  2884.   * edx = MSR address
  2885. Returned value:
  2886.   * ebx:eax = high:low dword of the result
  2887. Remarks:
  2888.   * If ecx contains nonexistent or not implemented for this processor
  2889.     MSR, processor will generate an exception in the kernel, which
  2890.     will kill the thread.
  2891.   * Previously it is necessary to check, whether MSRs are supported
  2892.     as a whole, with the instruction 'cpuid'. Otherwise processor
  2893.     will generate other exception in the kernel, which will anyway
  2894.     kill the thread.
  2895.  
  2896. ======================================================================
  2897. ========= Function 68, subfunction 4 - write to MSR-register. ========
  2898. ======================================================================
  2899. MSR = Model Specific Register; the complete list of MSR-registers
  2900. of a processor is included to the documentation on it (for example,
  2901. IA-32 Intel Architecture Software Developer's Manual,
  2902. Volume 3, Appendix B); each processor family has its own subset
  2903. of the MSR-registers.
  2904. Parameters:
  2905.   * eax = 68 - function number
  2906.   * ebx = 4 - subfunction number
  2907.   * ecx is ignored
  2908.   * edx = MSR address
  2909.   * esi:edi = high:low dword
  2910. Returned value:
  2911.   * function does not return value
  2912. Remarks:
  2913.   * If ecx contains nonexistent or not implemented for this processor
  2914.     MSR, processor will generate an exception in the kernel, which
  2915.     will kill the thread.
  2916.   * Previously it is necessary to check, whether MSRs are supported
  2917.     as a whole, with the instruction 'cpuid'. Otherwise processor
  2918.     will generate other exception in the kernel, which will anyway
  2919.     kill the thread.
  2920.  
  2921. ======================================================================
  2922. ======= Function 68, subfunction 11 - initialize process heap. =======
  2923. ======================================================================
  2924. Parameters:
  2925.   * eax = 68 - function number
  2926.   * ebx = 11 - subfunction number
  2927. Returned value:
  2928.   * eax = 0 - failed
  2929.   * otherwise size of created heap
  2930. Remarks:
  2931.   * The function call initializes heap, from which one can in future
  2932.     allocate and free memory blocks with subfunctions 12 and 13.
  2933.     Heap size is equal to total amount of free application memory.
  2934.   * The second function call from the same process results in
  2935.     returning the size of the existing heap.
  2936.   * After creation of the heap calls to function 64 will be ignored.
  2937.  
  2938. ======================================================================
  2939. ======== Function 68, subfunction 12 - allocate memory block. ========
  2940. ======================================================================
  2941. Parameters:
  2942.   * eax = 68 - function number
  2943.   * ebx = 12 - subfunction number
  2944.   * ecx = required size in bytes
  2945. Returned value:
  2946.   * eax = pointer to the allocated block
  2947. Remarks:
  2948.   * Before this call one must initialize process heap by call to
  2949.     subfunction 11.
  2950.   * The function allocates an integer number of pages (4 Kb) in such
  2951.     way that the real size of allocated block is more than or equal to
  2952.     requested size.
  2953.  
  2954. ======================================================================
  2955. ========== Function 68, subfunction 13 - free memory block. ==========
  2956. ======================================================================
  2957. Parameters:
  2958.   * eax = 68 - function number
  2959.   * ebx = 13 - subfunction number
  2960.   * ecx = pointer to the memory block
  2961. Returned value:
  2962.   * eax = 1 - success
  2963.   * eax = 0 - failed
  2964. Remarks:
  2965.   * The memory block must have been allocated by subfunction 12
  2966.     or subfunction 20.
  2967.  
  2968. ======================================================================
  2969. ===================== Function 68, subfunction 14 ====================
  2970. ============ Wait for signal from another program/driver. ============
  2971. ======================================================================
  2972. Parameters:
  2973.   * eax = 68 - function number
  2974.   * ebx = 14 - subfunction number
  2975.   * ecx = pointer to the buffer for information (24 bytes)
  2976. Returned value:
  2977.   * buffer pointed to by ecx contains the following information:
  2978.     * +0: dword: identifier for following data of signal
  2979.     * +4: dword: data of signal (20 bytes), format of which is defined
  2980.           by the first dword
  2981.  
  2982. ======================================================================
  2983. ============= Function 68, subfunction 16 - load driver. =============
  2984. ======================================================================
  2985. Parameters:
  2986.   * eax = 68 - function number
  2987.   * ebx = 16 - subfunction number
  2988.   * ecx = pointer to ASCIIZ-string with driver name
  2989. Returned value:
  2990.   * eax = 0 - failed
  2991.   * otherwise eax = driver handle
  2992. Remarks:
  2993.   * If the driver was not loaded yet, it is loaded;
  2994.     if the driver was loaded yet, nothing happens.
  2995.   * Driver name is case-sensitive.
  2996.     Maximum length of the name is 16 characters, including
  2997.     terminating null character, the rest is ignored.
  2998.   * Driver ABC is loaded from file /rd/1/drivers/ABC.obj.
  2999.  
  3000. ======================================================================
  3001. ============ Function 68, subfunction 17 - driver control. ===========
  3002. ======================================================================
  3003. Parameters:
  3004.   * eax = 68 - function number
  3005.   * ebx = 17 - subfunction number
  3006.   * ecx = pointer to the control structure:
  3007.     * +0: dword: handle of driver
  3008.     * +4: dword: code of driver function
  3009.     * +8: dword: pointer to input data
  3010.     * +12 = +0xC: dword: size of input data
  3011.     * +16 = +0x10: dword: pointer to output data
  3012.     * +20 = +0x14: dword: size of output data
  3013. Returned value:
  3014.   * eax = determined by driver
  3015. Remarks:
  3016.   * Function codes and the structure of input/output data
  3017.     are defined by driver.
  3018.   * Previously one must obtain driver handle by subfunction 16.
  3019.  
  3020. ======================================================================
  3021. =============== Function 68, subfunction 19 - load DLL. ==============
  3022. ======================================================================
  3023. Parameters:
  3024.   * eax = 68 - function number
  3025.   * ebx = 19 - subfunction number
  3026.   * ecx = pointer to ASCIIZ-string with the full path to DLL
  3027. Returned value:
  3028.   * eax = 0 - failed
  3029.   * otherwise eax = pointer to DLL export table
  3030. Remarks:
  3031.   * Export table is an array of structures of 2 dword's, terminated
  3032.     by zero. The first dword in structure points to function name,
  3033.     the second dword contains address of function.
  3034.  
  3035. ======================================================================
  3036. ======= Function 68, subfunction 20 - reallocate memory block. =======
  3037. ======================================================================
  3038. Parameters:
  3039.   * eax = 68 - function number
  3040.   * ebx = 20 - subfunction number
  3041.   * ecx = new size in bytes
  3042.   * edx = pointer to already allocated block
  3043. Returned value:
  3044.   * eax = pointer to the reallocated block, 0 = error
  3045. Remarks:
  3046.   * Before this call one must initialize process heap by call to
  3047.     subfunction 11.
  3048.   * The function allocates an integer number of pages (4 Kb) in such
  3049.     way that the real size of allocated block is more than or equal to
  3050.     requested size.
  3051.   * If edx=0, the function call is equivalent to memory allocation
  3052.     with subfunction 12. Otherwise the block at edx
  3053.     must be allocated earlier with subfunction 12 or this subfunction.
  3054.   * If ecx=0, the function frees memory block at edx and returns 0.
  3055.   * The contents of the block are unchanged up to the shorter of
  3056.     the new and old sizes.
  3057.  
  3058. ======================================================================
  3059. =========== Function 68, subfunction 21 - load driver PE. ============
  3060. ======================================================================
  3061. Parameters:
  3062.   * eax = 68 - function number
  3063.   * ebx = 21 - subfunction number
  3064.   * ecx = pointer to ASCIIZ-string with driver name
  3065.   * edx = pointer to command line
  3066. Returned value:
  3067.   * eax = 0 - failed
  3068.   * otherwise eax = driver handle
  3069. Remarks:
  3070.   * If the driver was not loaded yet, it is loaded;
  3071.     if the driver was loaded yet, nothing happens.
  3072.  
  3073. ======================================================================
  3074. ======== Function 68, subfunction 22 - open named memory area. =======
  3075. ======================================================================
  3076. Parameters:
  3077.   * eax = 68 - function number
  3078.   * ebx = 22 - subfunction number
  3079.   * ecx = area name. Maximum of 31 characters with terminating zero
  3080.   * edx = area size in bytes for SHM_CREATE and SHM_OPEN_ALWAYS
  3081.   * esi = flags for open and access:
  3082.     * SHM_OPEN        = 0x00 - open existing memory area. If an area
  3083.                           with such name does not exist, the function
  3084.                           will return error code 5.
  3085.     * SHM_OPEN_ALWAYS = 0x04 - open existing or create new
  3086.                           memory area.
  3087.     * SHM_CREATE      = 0x08 - create new memory area. If an area
  3088.                           with such name already exists, the function
  3089.                           will return error code 10.
  3090.     * SHM_READ        = 0x00 - only read access
  3091.     * SHM_WRITE       = 0x01 - read and write access
  3092. Returned value:
  3093.   * eax = pointer to memory area, 0 if error has occured
  3094.   * if new area is created (SHM_CREATE or SHM_OPEN_ALWAYS):
  3095.     edx = 0 - success, otherwise - error code
  3096.   * if existing area is opened (SHM_OPEN or SHM_OPEN_ALWAYS):
  3097.     edx = error code (if eax=0) or area size in bytes
  3098. Error codes:
  3099.   * E_NOTFOUND = 5
  3100.   * E_ACCESS = 10
  3101.   * E_NOMEM = 30
  3102.   * E_PARAM = 33
  3103. Remarks:
  3104.   * Before this call one must initialize process heap by call to
  3105.     subfunction 11.
  3106.   * If a new area is created, access flags set maximal rights
  3107.     for other processes. An attempt from other process to open
  3108.     with denied rights will fail with error code E_ACCESS.
  3109.   * The process which has created an area always has write access.
  3110.  
  3111. ======================================================================
  3112. ======= Function 68, subfunction 23 - close named memory area. =======
  3113. ======================================================================
  3114. Parameters:
  3115.   * eax = 68 - function number
  3116.   * ebx = 23 - subfunction number
  3117.   * ecx = area name. Maximum of 31 characters with terminating zero
  3118. Returned value:
  3119.   * eax destroyed
  3120. Remarks:
  3121.   * A memory area is physically freed (with deleting all data and
  3122.     freeing physical memory), when all threads which have opened
  3123.     this area will close it.
  3124.   * When thread is terminating, all opened by it areas are closed.
  3125.  
  3126. ======================================================================
  3127. ======== Function 68, subfunction 24 - set exception handler. ========
  3128. ======================================================================
  3129. Parameters:
  3130.   * eax = 68 - function number
  3131.   * ebx = 24 - subfunction number
  3132.   * ecx = address of the new exception handler
  3133.   * edx = the mask of handled exceptions
  3134. Returned value:
  3135.   * eax = address of the old exception handler (0, if it was not set)
  3136.   * ebx = the old mask of handled exceptions
  3137. Remarks:
  3138.   * Bit number in mask of exceptions corresponds to exception number
  3139.     in CPU-specification (Intel-PC). For example, FPU exceptions have
  3140.     number 16 (#MF), and SSE exceptions - 19 (#XF).
  3141.   * The current implementation ignores the inquiry for hook of 7
  3142.     exception - the system handles #NM by its own.
  3143.   * The exception handler is called with exception number as first
  3144.     (and only) stack parameter. So, correct exit from the handler is
  3145.     RET 4. It returns to the instruction, that caused the exception,
  3146.     for faults, and to the next instruction for traps (see
  3147.     classification of exceptions in CPU specification).
  3148.   * When user handler receives control, the corresponding bit in
  3149.     the exception mask is cleared. Raising this exception
  3150.     in consequence leads to default handling, that is,
  3151.     terminating the application in absence of debugger or
  3152.     suspend with notification of debugger otherwise.
  3153.   * After user handler completes critical operations, it can set
  3154.     the corresponding bit in the exception mask with subfunction 25.
  3155.     Also user handler is responsible for clearing exceptions flags in
  3156.     FPU and/or SSE.
  3157.  
  3158. ======================================================================
  3159. ====== Function 68, subfunction 25 - set FPU exception handler. ======
  3160. ======================================================================
  3161. Parameters:
  3162.   * eax = 68 - function number
  3163.   * ebx = 25 - subfunction number
  3164.   * ecx = signal number
  3165.   * edx = value of activity (0/1)
  3166. Returned value:
  3167.   * eax = -1 - invalid signal number
  3168.   * otherwise eax = old value of activity for this signal (0/1)
  3169. Remarks:
  3170.   * In current implementation only mask for user excepton handler,
  3171.     which has been previously set by subfunction 24,
  3172.     is changed. Signal number corresponds to exception number.
  3173.  
  3174. ======================================================================
  3175. ====== Function 68, subfunction 26 - release memory pages ============
  3176. ======================================================================
  3177. Parameters:
  3178.   * eax = 68 - function number
  3179.   * ebx = 26 - subfunction number
  3180.   * ecx = pointer to the memory block, allocated by subfunction 12
  3181.   * edx = offset from the block beginnings
  3182.   * esi = the size of the region of memory to release, in bytes
  3183. Remarks:
  3184.   * function release range of pages from ecx+edx to ecx+edx+esi
  3185.     and set virtual memory into reserved state.
  3186.  
  3187. ======================================================================
  3188. ========== Function 68, subfunction 27 - load file ===================
  3189. ======================================================================
  3190. Parameters:
  3191.   * eax = 68 - function number
  3192.   * ebx = 27 - subfunction number
  3193.   * ecx = pointer to ASCIIZ-string with the filename
  3194. Returned value:
  3195.   * eax = pointer to the loaded file, or zero
  3196.   * edx = size of the loaded file, or zero
  3197. Remarks:
  3198.   * function loads file and unpacks, if necessary
  3199.  
  3200. ======================================================================
  3201. ====================== Function 69 - debugging. ======================
  3202. ======================================================================
  3203. A process can load other process as debugged by set of corresponding
  3204. bit by call to subfunction 7 of function 70.
  3205. A process can have only one debugger; one process can debug some
  3206. others. The system notifies debugger on events occuring with
  3207. debugged process. Messages are written to the buffer defined by
  3208. subfunction 0.
  3209. Format of a message:
  3210.   * +0: dword: message code
  3211.   * +4: dword: PID of debugged process
  3212.   * +8: there can be additional data depending on message code
  3213. Message codes:
  3214.   * 1 = exception
  3215.     * in addition dword-number of the exception is given
  3216.     * process is suspended
  3217.   * 2 = process has terminated
  3218.     * comes at any termination: both through the system function -1,
  3219.       and at "murder" by any other process (including debugger itself)
  3220.   * 3 = debug exception int 1 = #DB
  3221.     * in addition dword-image of the register DR6 is given:
  3222.       * bits 0-3: condition of the corresponding breakpoint (set by
  3223.         subfunction 9) is satisfied
  3224.       * bit 14: exception has occured because of the trace mode
  3225.         (flag TF is set TF)
  3226.     * process is suspended
  3227. When debugger terminates, all debugged processes are killed.
  3228. If debugger does not want this, it must previously detach by
  3229. subfunction 3.
  3230.  
  3231. All subfunctions are applicable only to processes/threads started
  3232. from the current by function 70 with set debugging flag.
  3233. Debugging of multithreaded programs is not supported yet.
  3234. The full list of subfunctions:
  3235.   * subfunction 0 - define data area for debug messages
  3236.   * subfunction 1 - get contents of registers of debugged thread
  3237.   * subfunction 2 - set contents of registers of debugged thread
  3238.   * subfunction 3 - detach from debugged process
  3239.   * subfunction 4 - suspend debugged thread
  3240.   * subfunction 5 - resume debugged thread
  3241.   * subfunction 6 - read from the memory of debugged process
  3242.   * subfunction 7 - write to the memory of debugged process
  3243.   * subfunction 8 - terminate debugged thread
  3244.   * subfunction 9 - set/clear hardware breakpoint
  3245.  
  3246. ======================================================================
  3247. = Function 69, subfunction 0 - define data area fror debug messages. =
  3248. ======================================================================
  3249. Parameters:
  3250.   * eax = 69 - function number
  3251.   * ebx = 0 - subfunction number
  3252.   * ecx = pointer
  3253. Format of data area:
  3254.   * +0: dword: N = buffer size (not including this header)
  3255.   * +4: dword: occupied place
  3256.   * +8: N*byte: buffer
  3257. Returned value:
  3258.   * function does not return value
  3259. Remarks:
  3260.   * If the size field is negative, the buffer is considered locked
  3261.     and at arrival of new message the system will wait.
  3262.     For synchronization frame all work with the buffer by operations
  3263.     lock/unlock
  3264.         neg     [bufsize]
  3265.   * Data in the buffer are considered as array of items with variable
  3266.     length - messages. Format of a message is explained in
  3267.     general description.
  3268.  
  3269. ======================================================================
  3270. ===================== Function 69, subfunction 1 =====================
  3271. ============ Get contents of registers of debugged thread. ===========
  3272. ======================================================================
  3273. Parameters:
  3274.   * eax = 69 - function number
  3275.   * ebx = 1 - subfunction number
  3276.   * ecx = thread identifier
  3277.   * edx = size of context structure, must be 0x28=40 bytes
  3278.   * esi = pointer to context structure
  3279. Returned value:
  3280.   * function does not return value
  3281. Format of context structure: (FPU is not supported yet)
  3282.   * +0: dword: eip
  3283.   * +4: dword: eflags
  3284.   * +8: dword: eax
  3285.   * +12 = +0xC: dword: ecx
  3286.   * +16 = +0x10: dword: edx
  3287.   * +20 = +0x14: dword: ebx
  3288.   * +24 = +0x18: dword: esp
  3289.   * +28 = +0x1C: dword: ebp
  3290.   * +32 = +0x20: dword: esi
  3291.   * +36 = +0x24: dword: edi
  3292. Remarks:
  3293.   * If the thread executes code of ring-0, the function returns
  3294.     contents of registers of ring-3.
  3295.   * Process must be loaded for debugging (as is shown in
  3296.     general description).
  3297.  
  3298. ======================================================================
  3299. ===================== Function 69, subfunction 2 =====================
  3300. ============ Set contents of registers of debugged thread. ===========
  3301. ======================================================================
  3302. Parameters:
  3303.   * eax = 69 - function number
  3304.   * ebx = 2 - subfunction number
  3305.   * ecx = thread identifier
  3306.   * edx = size of context structure, must be 0x28=40 bytes
  3307. Returned value:
  3308.   * function does not return value
  3309. Format of context structure is shown in the description of
  3310. subfunction 1.
  3311. Remarks:
  3312.   * If the thread executes code of ring-0, the function returns
  3313.     contents of registers of ring-3.
  3314.   * Process must be loaded for debugging (as is shown in
  3315.     general description).
  3316.  
  3317. ======================================================================
  3318. ===== Function 69, subfunction 3 - detach from debugged process. =====
  3319. ======================================================================
  3320. Parameters:
  3321.   * eax = 69 - function number
  3322.   * ebx = 3 - subfunction number
  3323.   * ecx = identifier
  3324. Returned value:
  3325.   * function does not return value
  3326. Remarks:
  3327.   * If the process was suspended, it resumes execution.
  3328.  
  3329. ======================================================================
  3330. ======== Function 69, subfunction 4 - suspend debugged thread. =======
  3331. ======================================================================
  3332. Parameters:
  3333.   * eax = 69 - function number
  3334.   * ebx = 4 - subfunction number
  3335.   * ecx = thread identifier
  3336. Returned value:
  3337.   * function does not return value
  3338. Remarks:
  3339.   * Process must be loaded for debugging (as is shown in
  3340.     general description).
  3341.  
  3342. ======================================================================
  3343. ======== Function 69, subfunction 5 - resume debugged thread. ========
  3344. ======================================================================
  3345. Parameters:
  3346.   * eax = 69 - function number
  3347.   * ebx = 5 - subfunction number
  3348.   * ecx = thread identifier
  3349. Returned value:
  3350.   * function does not return value
  3351. Remarks:
  3352.   * Process must be loaded for debugging (as is shown in
  3353.     general description).
  3354.  
  3355. ======================================================================
  3356. = Fucntion 69, subfunction 6 - read from memory of debugged process. =
  3357. ======================================================================
  3358. Parameters:
  3359.   * eax = 69 - function number
  3360.   * ebx = 6 - subfunction number
  3361.   * ecx = identifier
  3362.   * edx = number of bytes to read
  3363.   * esi = address in the memory of debugged process
  3364.   * edi = pointer to buffer for data
  3365. Returned value:
  3366.   * eax = -1 at an error (invalid PID or buffer)
  3367.   * otherwise eax = number of read bytes (possibly, 0,
  3368.     if esi is too large)
  3369. Remarks:
  3370.   * Process must be loaded for debugging (as is shown in
  3371.     general description).
  3372.  
  3373. ======================================================================
  3374. == Function 69, subfunction 7 - write to memory of debugged process. =
  3375. ======================================================================
  3376. Parameters:
  3377.   * eax = 69 - function number
  3378.   * ebx = 7 - subfunction number
  3379.   * ecx = identifier
  3380.   * edx = number of bytes to write
  3381.   * esi = address of memory in debugged process
  3382.   * edi = pointer to data
  3383. Returned value:
  3384.   * eax = -1 at an error (invalid PID or buffer)
  3385.   * otherwise eax = number of written bytes (possibly, 0,
  3386.     if esi is too large)
  3387. Remarks:
  3388.   * Process must be loaded for debugging (as is shown in
  3389.     general description).
  3390.  
  3391. ======================================================================
  3392. ======= Function 69, subfunction 8 - terminate debugged thread. ======
  3393. ======================================================================
  3394. Parameters:
  3395.   * eax = 69 - function number
  3396.   * ebx = 8 - subfunction number
  3397.   * ecx = identifier
  3398. Returned value:
  3399.   * function does not return value
  3400. Remarks:
  3401.   * Process must be loaded for debugging (as is shown in
  3402.     general description).
  3403.   * The function is similar to subfunction 2 of function 18
  3404.     with two differences: it requires first remark and
  3405.     accepts PID rather than slot number.
  3406.  
  3407. ======================================================================
  3408. ===== Function 69, subfunction 9 - set/clear hardware breakpoint. ====
  3409. ======================================================================
  3410. Parameters:
  3411.   * eax = 69 - function number
  3412.   * ebx = 9 - subfunction number
  3413.   * ecx = thread identifier
  3414.   * dl = index of breakpoint, from 0 to 3 inclusively
  3415.   * dh = flags:
  3416.     * if high bit is cleared - set breakpoint:
  3417.       * bits 0-1 - condition:
  3418.         * 00 = breakpoint on execution
  3419.         * 01 = breakpoint on read
  3420.         * 11 = breakpoint on read/write
  3421.       * bits 2-3 - length; for breakpoints on exception it must be
  3422.         00, otherwise one of
  3423.         * 00 = byte
  3424.         * 01 = word
  3425.         * 11 = dword
  3426.       * esi = breakpoint address; must be aligned according to
  3427.         the length (i.e. must be even for word breakpoints,
  3428.         divisible by 4 for dword)
  3429.     * if high bit is set - clear breakpoint
  3430. Returned value:
  3431.   * eax = 0 - success
  3432.   * eax = 1 - error in the input data
  3433.   * eax = 2 - (reserved, is never returned in the current
  3434.     implementation) a global breakpoint with that index is already set
  3435. Remarks:
  3436.   * Process must be loaded for debugging (as is shown in
  3437.     general description).
  3438.   * Hardware breakpoints are implemented through DRx-registers of
  3439.     the processor, all limitations results from this.
  3440.   * The function can reinstall the breakpoint, previously set
  3441.     by it (and it does not inform on this).
  3442.     Carry on the list of set breakpoints in the debugger.
  3443.   * Breakpoints generate debug exception #DB, on which the system
  3444.     notifies debugger.
  3445.   * Breakpoints on write and read/write act after
  3446.     execution of the caused it instruction.
  3447.  
  3448. ======================================================================
  3449. ==== Function 70 - work with file system with long names support. ====
  3450. ======================================================================
  3451. Parameters:
  3452.   * eax = 70
  3453.   * ebx = pointer to the information structure
  3454. Returned value:
  3455.   * eax = 0 - success; otherwise file system error code
  3456.   * some subfunctions return value in other registers too
  3457. General format of the information structure:
  3458.   * +0: dword: subfunction number
  3459.   * +4: dword: file offset
  3460.   * +8: dword: high dword of offset (must be 0) or flags field
  3461.   * +12 = +0xC: dword: size
  3462.   * +16 = +0x10: dword: pointer to data
  3463.   * +20 = +0x14: n db: ASCIIZ-string with the filename
  3464.     or
  3465.   * +20 = +0x14: db 0
  3466.   * +21 = +0x15: dd pointer to ASCIIZ-string with the filename
  3467. Specifications - in documentation on the appropriate subfunction.
  3468. Filename is case-insensitive. Russian letters must be written in
  3469. the encoding cp866 (DOS).
  3470. Format of filename:
  3471. /base/number/dir1/dir2/.../dirn/file,
  3472. where /base/number identifies device, on which file is located:
  3473. one of
  3474.   * /RD/1 = /RAMDISK/1 to access ramdisk
  3475.   * /FD/1 = /FLOPPYDISK/1 to access first floppy drive,
  3476.     /FD/2 = /FLOPPYDISK/2 to access second one
  3477.   * /HD0/x, /HD1/x, /HD2/x, /HD3/x to access accordingly to devices
  3478.     IDE0 (Primary Master), IDE1 (Primary Slave),
  3479.     IDE2 (Secondary Master), IDE3 (Secondary Slave);
  3480.     x - partition number on the selected hard drive, varies from 1
  3481.     to 255 (on each hard drive the indexing starts from 1)
  3482.   * /CD0/1, /CD1/1, /CD2/1, /CD3/1 to access accordingly to
  3483.     CD on IDE0 (Primary Master), IDE1 (Primary Slave),
  3484.     IDE2 (Secondary Master), IDE3 (Secondary Slave)
  3485.   * /SYS means system folder; with the usual boot (from floppy)
  3486.     is equivalent to /RD/1
  3487. Examples:
  3488.   * '/rd/1/kernel.asm',0
  3489.   * '/HD0/1/kernel.asm',0
  3490.   * '/hd0/2/menuet/pics/tanzania.bmp',0
  3491.   * '/hd0/1/Program files/NameOfProgram/SomeFile.SomeExtension',0
  3492.   * '/sys/MySuperApp.ini',0
  3493. Also function supports relative names.  If the path begins not
  3494. with '/', it is considered relative to a current folder. To get or
  3495. set a current folder, use the function 30.
  3496.  
  3497. Available subfunctions:
  3498.   * subfunction 0 - read file
  3499.   * subfunction 1 - read folder
  3500.   * subfunction 2 - create/rewrite file
  3501.   * subfunction 3 - write to existing file
  3502.   * subfunction 4 - set file size
  3503.   * subfunction 5 - get attributes of file/folder
  3504.   * subfunction 6 - set attributes of file/folder
  3505.   * subfunction 7 - start application
  3506.   * subfunction 8 - delete file/folder
  3507.   * subfunction 9 - create folder
  3508. For CD-drives due to hardware limitations only subfunctions
  3509. 0,1,5 and 7 are available, other subfunctions return error
  3510. with code 2.
  3511. At the first call of subfunctions 0,1,5,7 to ATAPI devices
  3512. (CD and DVD) the manual control of tray is locked due to caching
  3513. drive data. Unlocking is made when subfunction 4 of function 24
  3514. is called for corresponding device.
  3515.  
  3516. ======================================================================
  3517. === Function 70, subfunction 0 - read file with long names support. ==
  3518. ======================================================================
  3519. Parameters:
  3520.   * eax = 70 - function number
  3521.   * ebx = pointer to the information structure
  3522. Format of the information structure:
  3523.   * +0: dword: 0 = subfunction number
  3524.   * +4: dword: file offset (in bytes)
  3525.   * +8: dword: 0 (reserved for high dword of offset)
  3526.   * +12 = +0xC: dword: number of bytes to read
  3527.   * +16 = +0x10: dword: pointer to buffer for data
  3528.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  3529.     given in the general description
  3530.     or
  3531.   * +20 = +0x14: db 0
  3532.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  3533. Returned value:
  3534.   * eax = 0 - success, otherwise file system error code
  3535.   * ebx = number of read bytes or -1=0xffffffff if file was not found
  3536. Remarks:
  3537.   * If file was ended before last requested block was read,
  3538.     the function will read as many as it can, and after that return
  3539.     eax=6 (EOF).
  3540.   * The function does not allow to read folder (returns eax=10,
  3541.     access denied).
  3542.  
  3543. ======================================================================
  3544. == Function 70, subfunction 1 - read folder with long names support. =
  3545. ======================================================================
  3546. Parameters:
  3547.   * eax = 70 - function number
  3548.   * ebx = pointer to the information structure
  3549. Format of the information structure:
  3550.   * +0: dword: 1 = subfunction number
  3551.   * +4: dword: index of starting block (beginning from 0)
  3552.   * +8: dword: flags field:
  3553.     * bit 0 (mask 1): in what format to return names,
  3554.       0=ANSI, 1=UNICODE
  3555.     * other bits are reserved and must be set to 0 for the future
  3556.       compatibility
  3557.   * +12 = +0xC: dword: number of blocks to read
  3558.   * +16 = +0x10: dword: pointer to buffer for data, buffer size
  3559.     must be not less than 32 + [+12]*560 bytes
  3560.   * +20 = +0x14: ASCIIZ-name of folder, the rules of names forming are
  3561.     given in the general description
  3562.     or
  3563.   * +20 = +0x14: db 0
  3564.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  3565. Returned value:
  3566.   * eax = 0 - success, otherwise file system error code
  3567.   * ebx = number of files, information on which was written to
  3568.     the buffer, or -1=0xffffffff, if folder was not found
  3569. Structure of the buffer:
  3570.   * +0: 32*byte: header
  3571.   * +32 = +0x20: n1*byte: block with information on file 1
  3572.   * +32+n1: n2*byte: block with information on file 2
  3573.   * ...
  3574. Structure of header:
  3575.   * +0: dword: version of structure (current is 1)
  3576.   * +4: dword: number of placed blocks; is not greater than requested
  3577.     in the field +12 of information structure; can be less, if
  3578.     there are no more files in folder (the same as in ebx)
  3579.   * +8: dword: total number of files in folder
  3580.   * +12 = +0xC: 20*byte: reserved (zeroed)
  3581. Structure of block of data for folder entry (BDFE):
  3582.   * +0: dword: attributes of file:
  3583.     * bit 0 (mask 1): file is read-only
  3584.     * bit 1 (mask 2): file is hidden
  3585.     * bit 2 (mask 4): file is system
  3586.     * bit 3 (mask 8): this is not a file but volume label
  3587.       (for one partition meets no more than once and
  3588.       only in root folder)
  3589.     * bit 4 (mask 0x10): this is a folder
  3590.     * bit 5 (mask 0x20): file was not archived - many archivation
  3591.       programs have an option to archive only files with this bit set,
  3592.       and after archiving this bit is cleared - it can be useful
  3593.       for automatically creating of backup-archives as at writing
  3594.       this bit is usually set
  3595.   * +4: byte: type of name data:
  3596.     (coincides with bit 0 of flags in the information structure)
  3597.     * 0 = ASCII = 1-byte representation of each character
  3598.     * 1 = UNICODE = 2-byte representation of each character
  3599.   * +5: 3*byte: reserved (zero)
  3600.   * +8: 4*byte: time of file creation
  3601.   * +12 = +0xC: 4*byte: date of file creation
  3602.   * +16 = +0x10: 4*byte: time of last access (read or write)
  3603.   * +20 = +0x14: 4*byte: date of last access
  3604.   * +24 = +0x18: 4*byte: time of last modification
  3605.   * +28 = +0x1C: 4*byte: date of last modification
  3606.   * +32 = +0x20: qword: file size in bytes (up to 16777216 Tb)
  3607.   * +40 = +0x28: name
  3608.     * for ASCII format: maximum length is 263 characters
  3609.       (263 bytes), byte after the name has value 0
  3610.     * for UNICODE format: maximum length is 259 characters
  3611.       (518 bytes), 2 bytes after the name have value 0
  3612. Time format:
  3613.   * +0: byte: seconds
  3614.   * +1: byte: minutes
  3615.   * +2: byte: hours
  3616.   * +3: byte: reserved (0)
  3617.   * for example, 23.59.59 is written as (in hex) 3B 3B 17 00
  3618. Date format:
  3619.   * +0: byte: day
  3620.   * +1: byte: month
  3621.   * +2: word: year
  3622.   * for example, 25.11.1979 is written as (in hex) 19 0B BB 07
  3623. Remarks:
  3624.   * If BDFE contains ASCII name, the length of BDFE is 304 bytes,
  3625.     if UNICODE name - 560 bytes. Value of length is aligned
  3626.     on 16-byte bound (to accelerate processing in CPU cache).
  3627.   * First character after a name is zero (ASCIIZ-string). The further
  3628.     data contain garbage.
  3629.   * If files in folder were ended before requested number was read,
  3630.     the function will read as many as it can, and after that return
  3631.     eax=6 (EOF).
  3632.   * Any folder on the disk, except for root, contains two special
  3633.     entries "." and "..", identifying accordingly the folder itself
  3634.     and the parent folder.
  3635.   * The function allows also to read virtual folders "/", "/rd",
  3636.     "/fd", "/hd[n]", thus attributes of subfolders are set to 0x10,
  3637.     and times and dates are zeroed. An alternative way to get the
  3638.     equipment information - subfunction 11 of function 18.
  3639.  
  3640. ======================================================================
  3641. ===================== Function 70, subfunction 2 =====================
  3642. ============ Create/rewrite file with long names support. ============
  3643. ======================================================================
  3644. Parameters:
  3645.   * eax = 70 - function number
  3646.   * ebx = pointer to the information structure
  3647. Format of the information structure:
  3648.   * +0: dword: 2 = subfunction number
  3649.   * +4: dword: 0 (reserved)
  3650.   * +8: dword: 0 (reserved)
  3651.   * +12 = +0xC: dword: number of bytes to write
  3652.   * +16 = +0x10: dword: pointer to data
  3653.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  3654.     given in the general description
  3655.     or
  3656.   * +20 = +0x14: db 0
  3657.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  3658. Returned value:
  3659.   * eax = 0 - success, otherwise file system error code
  3660.   * ebx = number of written bytes (possibly 0)
  3661. Remarks:
  3662.   * If a file with given name did not exist, it is created;
  3663.     if it existed, it is rewritten.
  3664.   * If there is not enough free space on disk, the function will
  3665.     write as many as can and then return error code 8.
  3666.   * The function is not supported for CD (returns error code 2).
  3667.  
  3668. ======================================================================
  3669. ===================== Function 70, subfunction 3 =====================
  3670. =========== Write to existing file with long names support. ==========
  3671. ======================================================================
  3672. Parameters:
  3673.   * eax = 70 - function number
  3674.   * ebx = pointer to the information structure
  3675. Format of the information structure:
  3676.   * +0: dword: 3 = subfunction number
  3677.   * +4: dword: file offset (in bytes)
  3678.   * +8: dword: high dword of offset (must be 0 for FAT)
  3679.   * +12 = +0xC: dword: number of bytes to write
  3680.   * +16 = +0x10: dword: pointer to data
  3681.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  3682.     given in the general description
  3683.     or
  3684.   * +20 = +0x14: db 0
  3685.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  3686. Returned value:
  3687.   * eax = 0 - success, otherwise file system error code
  3688.   * ebx = number of written bytes (possibly 0)
  3689. Remarks:
  3690.   * The file must already exist, otherwise function returns eax=5.
  3691.   * The only result of write 0 bytes is update in the file attributes
  3692.     date/time of modification and access to the current date/time.
  3693.   * If beginning and/or ending position is greater than file size
  3694.     (except for the previous case), the file is expanded to needed
  3695.     size with zero characters.
  3696.   * The function is not supported for CD (returns error code 2).
  3697.  
  3698. ======================================================================
  3699. ============ Function 70, subfunction 4 - set end of file. ===========
  3700. ======================================================================
  3701. Parameters:
  3702.   * eax = 70 - function number
  3703.   * ebx = pointer to the information structure
  3704. Format of the information structure:
  3705.   * +0: dword: 4 = subfunction number
  3706.   * +4: dword: low dword of new file size
  3707.   * +8: dword: high dword of new file size (must be 0 for FAT)
  3708.   * +12 = +0xC: dword: 0 (reserved)
  3709.   * +16 = +0x10: dword: 0 (reserved)
  3710.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  3711.     given in the general description
  3712.     or
  3713.   * +20 = +0x14: db 0
  3714.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  3715. Returned value:
  3716.   * eax = 0 - success, otherwise file system error code
  3717.   * ebx destroyed
  3718. Remarks:
  3719.   * If the new file size is less than old one, file is truncated.
  3720.     If the new size is greater than old one, file is expanded with
  3721.     characters with code 0. If the new size is equal to old one,
  3722.     the only result of call is set date/time of modification and
  3723.     access to the current date/time.
  3724.   * If there is not enough free space on disk for expansion, the
  3725.     function will expand to maximum possible size and then return
  3726.     error code 8.
  3727.   * The function is not supported for CD (returns error code 2).
  3728.  
  3729. ======================================================================
  3730. ==== Function 70, subfunction 5 - get information on file/folder. ====
  3731. ======================================================================
  3732. Parameters:
  3733.   * eax = 70 - function number
  3734.   * ebx = pointer to the information structure
  3735. Format of the information structure:
  3736.   * +0: dword: 5 = subfunction number
  3737.   * +4: dword: 0 (reserved)
  3738.   * +8: dword: 0 (reserved)
  3739.   * +12 = +0xC: dword: 0 (reserved)
  3740.   * +16 = +0x10: dword: pointer to buffer for data (40 bytes)
  3741.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  3742.     given in the general description
  3743.     or
  3744.   * +20 = +0x14: db 0
  3745.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  3746. Returned value:
  3747.   * eax = 0 - success, otherwise file system error code
  3748.   * ebx destroyed
  3749. Information on file is returned in the BDFE format (block of data
  3750. for folder entry), explained in the description of
  3751. subfunction 1, but without filename
  3752. (i.e. only first 40 = 0x28 bytes).
  3753. Remarks:
  3754.   * The function does not support virtual folders such as /, /rd and
  3755.     root folders like /rd/1.
  3756.  
  3757. ======================================================================
  3758. ===== Function 70, subfunction 6 - set attributes of file/folder. ====
  3759. ======================================================================
  3760. Parameters:
  3761.   * eax = 70 - function number
  3762.   * ebx = pointer to the information structure
  3763. Format of the information structure:
  3764.   * +0: dword: 6 = subfunction number
  3765.   * +4: dword: 0 (reserved)
  3766.   * +8: dword: 0 (reserved)
  3767.   * +12 = +0xC: dword: 0 (reserved)
  3768.   * +16 = +0x10: dword: pointer to buffer with attributes (32 bytes)
  3769.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  3770.     given in the general description
  3771.     or
  3772.   * +20 = +0x14: db 0
  3773.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  3774. Returned value:
  3775.   * eax = 0 - success, otherwise file system error code
  3776.   * ebx destroyed
  3777. File attributes are first 32 bytes in BDFE (block of data
  3778. for folder entry), explained in the description of subfunction 1
  3779. (that is, without name and size of file). Attribute
  3780. file/folder/volume label (bits 3,4 in dword +0) is not changed.
  3781. Byte +4 (name format) is ignored.
  3782. Remarks:
  3783.   * The function does not support virtual folders such as /, /rd and
  3784.     root folders like /rd/1.
  3785.   * The function is not supported for CD (returns error code 2).
  3786.  
  3787. ======================================================================
  3788. =========== Function 70, subfunction 7 - start application. ==========
  3789. ======================================================================
  3790. Parameters:
  3791.   * eax = 70 - function number
  3792.   * ebx = pointer to the information structure
  3793. Format of the information structure:
  3794.   * +0: dword: 7 = subfunction number
  3795.   * +4: dword: flags field:
  3796.     * bit 0: start process as debugged
  3797.     * other bits are reserved and must be set to 0
  3798.   * +8: dword: 0 or pointer to ASCIIZ-string with parameters
  3799.   * +12 = +0xC: dword: 0 (reserved)
  3800.   * +16 = +0x10: dword: 0 (reserved)
  3801.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  3802.     given in the general description
  3803.     or
  3804.   * +20 = +0x14: db 0
  3805.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  3806. Returned value:
  3807.   * eax > 0 - program is loaded, eax contains PID
  3808.   * eax < 0 - an error has occured, -eax contains
  3809.     file system error code
  3810.   * ebx destroyed
  3811. Remarks:
  3812.   * Command line must be terminated by the character with the code 0
  3813.     (ASCIIZ-string); function takes into account either all characters
  3814.     up to terminating zero inclusively or first 256 character
  3815.     regarding what is less.
  3816.   * If the process is started as debugged, it is created in
  3817.     the suspended state; to run use subfunction 5 of function 69.
  3818.  
  3819. ======================================================================
  3820. ========== Function 70, subfunction 8 - delete file/folder. ==========
  3821. ======================================================================
  3822. Parameters:
  3823.   * eax = 70 - function number
  3824.   * ebx = pointer to the information structure
  3825. Format of the information structure:
  3826.   * +0: dword: 8 = subfunction number
  3827.   * +4: dword: 0 (reserved)
  3828.   * +8: dword: 0 (reserved)
  3829.   * +12 = +0xC: dword: 0 (reserved)
  3830.   * +16 = +0x10: dword: 0 (reserved)
  3831.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  3832.     given in the general description
  3833.     or
  3834.   * +20 = +0x14: db 0
  3835.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  3836. Returned value:
  3837.   * eax = 0 - success, otherwise file system error code
  3838.   * ebx destroyed
  3839. Remarks:
  3840.   * The function is not supported for CD (returns error code 2).
  3841.   * The function can delete only empty folders (attempt to delete
  3842.     nonempty folder results in error with code 10, "access denied").
  3843.  
  3844. ======================================================================
  3845. ============= Function 70, subfunction 9 - create folder. ============
  3846. ======================================================================
  3847. Parameters:
  3848.   * eax = 70 - function number
  3849.   * ebx = pointer to the information structure
  3850. Format of the information structure:
  3851.   * +0: dword: 9 = subfunction number
  3852.   * +4: dword: 0 (reserved)
  3853.   * +8: dword: 0 (reserved)
  3854.   * +12 = +0xC: dword: 0 (reserved)
  3855.   * +16 = +0x10: dword: 0 (reserved)
  3856.   * +20 = +0x14: ASCIIZ-name of folder, the rules of names forming are
  3857.     given in the general description
  3858.     or
  3859.   * +20 = +0x14: db 0
  3860.   * +21 = +0x15: dd pointer to ASCIIZ-string with folder name
  3861. Returned value:
  3862.   * eax = 0 - success, otherwise file system error code
  3863.   * ebx destroyed
  3864. Remarks:
  3865.   * The function is not supported for CD (returns error code 2).
  3866.   * The parent folder must already exist.
  3867.   * If target folder already exists, function returns success (eax=0).
  3868.  
  3869. ======================================================================
  3870. ========== Function 71, subfunction 1 - set window caption. ==========
  3871. ======================================================================
  3872. Parameters:
  3873.   * eax = 71 - function number
  3874.   * ebx = 1 - subfunction number
  3875.   * ecx = pointer to caption string
  3876. Returned value:
  3877.   * function does not return value
  3878. Remarks:
  3879.   * String must be in the ASCIIZ-format. Disregarding real string
  3880.     length, no more than 255 characters are drawn.
  3881.   * Pass NULL in ecx to remove caption.
  3882.  
  3883. ======================================================================
  3884. =============== Function 72 - send message to a window. ==============
  3885. ======================================================================
  3886.  
  3887. - Subfunction 1 - send message with parameter to the active window. --
  3888. Parameters:
  3889.   * eax = 72 - function number
  3890.   * ebx = 1 - subfunction number
  3891.   * ecx = event code: 2 or 3
  3892.   * edx = parameter: key code for ecx=2, button identifier for ecx=3
  3893. Returned value:
  3894.   * eax = 0 - success
  3895.   * eax = 1 - buffer is full
  3896.  
  3897. ======================================================================
  3898. ===================== Function 73 - blit bitmap  =====================
  3899. ======================================================================
  3900.  
  3901. Parameters:
  3902.   * eax = 73 - function number
  3903.  
  3904.   * ebx = ROP and optional flags
  3905.      31           6 5  4 3   0
  3906.      [  reserved  ][T][B][ROP]
  3907.      ROP - raster operation code
  3908.         0: Copy
  3909.      1-15: reserved
  3910.      B   - blit into the background surface
  3911.      T   - transparent blit
  3912.  
  3913.   * ecx = pointer to the function parameters
  3914.         destination offset and clipping
  3915.      +0 signed dword: destination rectangle X offset from the window
  3916.                       top-left corner
  3917.      +4 signed dword: destination rectangle Y offset from the window
  3918.                       top-left corner
  3919.      +8 dword:        destination rectangle width
  3920.     +12 dword:        destination rectangle height
  3921.  
  3922.         source offset and clipping
  3923.     +16 signed dword: source rectangle X offset from the bitmap
  3924.                       top-left corner
  3925.     +20 signed dword: source rectangle Y offset from the bitmap
  3926.                       top-left corner
  3927.     +24 dword:        source rectangle width
  3928.     +28 dword:        source rectangle height
  3929.  
  3930.     +32: dword: bitmap data - must be 32bpp
  3931.     +36: dword: size of the bitmap row in bytes
  3932.  
  3933. Returned value:
  3934.   * function does not return value
  3935.  
  3936. ======================================================================
  3937. = Function 74, Subfunction -1, Get number of active network devices. =
  3938. ======================================================================
  3939. Parameters:
  3940.   * eax = 74 - function number
  3941.   * bl = -1 - subfunction number
  3942. Returned value:
  3943.   * eax = number of active network devices
  3944.  
  3945. ======================================================================
  3946. ======== Function 74, Subfunction 0, Get network device type. ========
  3947. ======================================================================
  3948. Parameters:
  3949.   * eax = 74 - function number
  3950.   * bl = 0 - subfunction number
  3951.   * bh = device number
  3952. Returned value:
  3953.   * eax = device type
  3954.  
  3955. ======================================================================
  3956. ======== Function 74, Subfunction 1, Get network device name. ========
  3957. ======================================================================
  3958. Parameters:
  3959.   * eax = 74 - function number
  3960.   * bl = 1 - subfunction number
  3961.   * bh = device number
  3962.   * ecx = pointer to 64 byte buffer
  3963. Returned value:
  3964.   * eax = -1 on error
  3965.   * The network device name is written into the buffer, on success
  3966.  
  3967. ======================================================================
  3968. ========= Function 74, Subfunction 2, Reset network device. ==========
  3969. ======================================================================
  3970. Parameters:
  3971.   * eax = 74 - function number
  3972.   * bl = 2 - subfunction number
  3973.   * bh = device number
  3974. Returned value:
  3975.   * eax = -1 on error
  3976.  
  3977. ======================================================================
  3978. ========== Function 74, Subfunction 3, Stop network device. ==========
  3979. ======================================================================
  3980. Parameters:
  3981.   * eax = 74 - function number
  3982.   * bl = 3 - subfunction number
  3983.   * bh = device number
  3984. Returned value:
  3985.   * eax = -1 on error
  3986.  
  3987. ======================================================================
  3988. ============== Function 75, Subfunction 0, Open socket. ==============
  3989. ======================================================================
  3990. Parameters:
  3991.   * eax = 75 - function number
  3992.   * bl = 0 - subfunction number
  3993.   * ecx = domain
  3994.   * edx = type
  3995.   * esi = protocol
  3996. Returned value:
  3997.   * eax = socket number, -1 on error
  3998.   * ebx = errorcode
  3999.  
  4000. ======================================================================
  4001. ============= Function 75, Subfunction 1, Close socket. ==============
  4002. ======================================================================
  4003. Parameters:
  4004.   * eax = 75 - function number
  4005.   * bl = 1 - subfunction number
  4006.   * ecx = socket number
  4007. Returned value:
  4008.   * eax = -1 on error
  4009.   * ebx = errorcode
  4010.  
  4011. ======================================================================
  4012. ================== Function 75, Subfunction 2, Bind. =================
  4013. ======================================================================
  4014. Parameters:
  4015.   * eax = 75 - function number
  4016.   * bl = 2 - subfunction number
  4017.   * ecx = socket number
  4018.   * edx = pointer to sockaddr structure
  4019.   * esi = length of sockaddr structure
  4020. Returned value:
  4021.   * eax = -1 on error
  4022.   * ebx = errorcode
  4023.  
  4024. ======================================================================
  4025. ================= Function 75, Subfunction 3, Listen. ================
  4026. ======================================================================
  4027. Parameters:
  4028.   * eax = 75 - function number
  4029.   * bl = 3 - subfunction number
  4030.   * ecx = socket number
  4031.   * edx = backlog
  4032. Returned value:
  4033.   * eax = -1 on error
  4034.   * ebx = errorcode
  4035.  
  4036. ======================================================================
  4037. ================ Function 75, Subfunction 4, Connect. ================
  4038. ======================================================================
  4039. Parameters:
  4040.   * eax = 75 - function number
  4041.   * bl = 4 - subfunction number
  4042.   * ecx = socket number
  4043.   * edx = pointer to sockaddr structure
  4044.   * esi = length of sockaddr structure
  4045. Returned value:
  4046.   * eax = -1 on error
  4047.   * ebx = errorcode
  4048.  
  4049. ======================================================================
  4050. ================= Function 75, Subfunction 5, Accept. ================
  4051. ======================================================================
  4052. Parameters:
  4053.   * eax = 75 - function number
  4054.   * bl = 5 - subfunction number
  4055.   * ecx = socket number
  4056.   * edx = pointer to sockaddr structure
  4057.   * esi = length of sockaddr structure
  4058. Returned value:
  4059.   * eax = socket number of accepted socket, -1 on error
  4060.   * ebx = errorcode
  4061.  
  4062. ======================================================================
  4063. ================== Function 75, Subfunction 6, Send. =================
  4064. ======================================================================
  4065. Parameters:
  4066.   * eax = 75 - function number
  4067.   * bl = 6 - subfunction number
  4068.   * ecx = socket number
  4069.   * edx = pointer to buffer
  4070.   * esi = length of buffer
  4071.   * edi = flags
  4072. Returned value:
  4073.   * eax = number of bytes copied, -1 on error
  4074.   * ebx = errorcode
  4075.  
  4076. ======================================================================
  4077. ================ Function 75, Subfunction 7, Receive. ================
  4078. ======================================================================
  4079. Parameters:
  4080.   * eax = 75 - function number
  4081.   * bl = 7 - subfunction number
  4082.   * ecx = socket number
  4083.   * edx = pointer to buffer
  4084.   * esi = length of buffer
  4085.   * edi = flags
  4086. Returned value:
  4087.   * eax = number of bytes copied, -1 on error
  4088.   * ebx = errorcode
  4089.  
  4090. ======================================================================
  4091. =========== Function 75, Subfunction 8, Set socket options. ==========
  4092. ======================================================================
  4093. Parameters:
  4094.   * eax = 75 - function number
  4095.   * bl = 8 - subfunction number
  4096.   * ecx = socket number
  4097.   * edx = pointer to optstruct
  4098. Returned value:
  4099.   * eax = -1 on error
  4100.   * ebx = errorcode
  4101. Remarks:
  4102.  
  4103.   Optstruct: dd level
  4104.              dd optionname
  4105.              dd optlength
  4106.              db options...
  4107.  
  4108. ======================================================================
  4109. =========== Function 75, Subfunction 9, Get socket options. ==========
  4110. ======================================================================
  4111. Parameters:
  4112.   * eax = 75 - function number
  4113.   * bl = 9 - subfunction number
  4114.   * ecx = socket number
  4115.   * edx = pointer to optstruct
  4116. Returned value:
  4117.   * eax = -1 on error
  4118.   * ebx = errorcode
  4119. Remarks:
  4120.  
  4121.   Optstruct: dd level
  4122.              dd optionname
  4123.              dd optlength
  4124.              db options...
  4125.  
  4126. ======================================================================
  4127. ============ Function 75, Subfunction 10, Get socketpair. ===========
  4128. ======================================================================
  4129. Parameters:
  4130.   * eax = 75 - function number
  4131.   * bl = 10 - subfunction number
  4132. Returned value:
  4133.   * eax = socketnum1, -1 on error
  4134.   * ebx = socketnum2, errorcode on error
  4135.  
  4136. ======================================================================
  4137. =============== Function -1 - terminate thread/process ===============
  4138. ======================================================================
  4139. Parameters:
  4140.   * eax = -1 - function number
  4141. Returned value:
  4142.   * function does not return neither value nor control
  4143. Remarks:
  4144.   * If the process did not create threads obviously, it has only
  4145.     one thread, which termination results in process termination.
  4146.   * If the current thread is last in the process, its termination
  4147.     also results in process terminates.
  4148.   * This function terminates the current thread. Other thread can be
  4149.     killed by call to subfunction 2 of function 18.
  4150.  
  4151. ======================================================================
  4152. =========================== List of events ===========================
  4153. ======================================================================
  4154. Next event can be retrieved by the call of one from functions 10
  4155. (to wait for event), 11 (to check without waiting), 23
  4156. (to wait during the given time).
  4157. These functions return only those events, which enter into a mask set
  4158. by function 40. By default it is first three,
  4159. there is enough for most applications.
  4160. Codes of events:
  4161.   * 1 = redraw event (is reset by call to function 0)
  4162.   * 2 = key on keyboard is pressed (acts, only when the window is
  4163.     active) or hotkey is pressed; is reset, when all keys from
  4164.     the buffer are read out by function 2
  4165.   * 3 = button is pressed, defined earlier by function 8
  4166.     (or close button, created implicitly by function 0;
  4167.     minimize button is handled by the system and sends no message;
  4168.     acts, only when the window is active;
  4169.     is reset when all buttons from the buffer
  4170.     are read out by function 17)
  4171.   * 4 = reserved (in current implementation never comes even after
  4172.     unmasking by function 40)
  4173.   * 5 = kernel finished redrawing of the desktop background
  4174.   * 6 = mouse event (something happened - button pressing or moving;
  4175.     is reset at reading)
  4176.   * 7 = IPC event (see function 60 -
  4177.     Inter Process Communication; is reset at reading)
  4178.   * 8 = network event (is reset at reading)
  4179.   * 9 = debug event (is reset at reading; see
  4180.     debug subsystem)
  4181.   * 16..31 = event with appropriate IRQ
  4182.     (16=IRQ0, 31=IRQ15) (is reset after reading all IRQ data)
  4183.  
  4184. ======================================================================
  4185. =================== Error codes of the file system ===================
  4186. ======================================================================
  4187.   * 0 = success
  4188.   * 1 = base and/or partition of a hard disk is not defined
  4189.     (by subfunctions 7, 8 of function 21)
  4190.   * 2 = function is not supported for the given file system
  4191.   * 3 = unknown file system
  4192.   * 4 = reserved, is never returned in the current implementation
  4193.   * 5 = file not found
  4194.   * 6 = end of file, EOF
  4195.   * 7 = pointer lies outside of application memory
  4196.   * 8 = disk is full
  4197.   * 9 = FAT table is destroyed
  4198.   * 10 = access denied
  4199.   * 11 = device error
  4200. Application start functions can return also following errors:
  4201.   * 30 = 0x1E = not enough memory
  4202.   * 31 = 0x1F = file is not executable
  4203.   * 32 = 0x20 = too many processes
  4204.