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  1. SYSTEM FUNCTIONS of OS Kolibri 0.7.5.0
  2.  
  3. Number of the function is located in the register eax.
  4. The call of the system function is executed by "int 0x40" command.
  5. All registers except explicitly declared in the returned value,
  6.     including eflags, are preserved.
  7.  
  8.  
  9. ======================================================================
  10. ============== Function 0 - define and draw the window. ==============
  11. ======================================================================
  12. Defines an application window. Draws a frame of the window, header and
  13. working area. For skinned windows defines standard close and minimize
  14. buttons.
  15. Parameters:
  16.   * eax = 0 - function number
  17.   * ebx = [coordinate on axis x]*65536 + [size on axis x]
  18.   * ecx = [coordinate on axis y]*65536 + [size on axis y]
  19.   * edx = 0xXYRRGGBB, where:
  20.     * Y = style of the window:
  21.       * Y=0 - type I - fixed-size window
  22.       * Y=1 - only define window area, draw nothing
  23.       * Y=2 - type II - variable-size window
  24.       * Y=3 - skinned window
  25.       * Y=4 - skinned fixed-size window
  26.       * other possible values (from 5 up to 15) are reserved,
  27.         function call with such Y is ignored
  28.     * RR, GG, BB = accordingly red, green, blue components of a color
  29.       of the working area of the window (are ignored for style Y=2)
  30.     * X = DCBA (bits)
  31.       * A = 1 - window has caption; for styles Y=3,4 caption string
  32.                   must be passed in edi, for other styles use
  33.                   subfunction 1 of function 71
  34.       * B = 1 - coordinates of all graphics primitives are relative to
  35.                   window client area
  36.       * C = 1 - don't fill working area on window draw
  37.       * D = 0 - normal filling of the working area, 1 - gradient
  38.     The following parameters are intended for windows
  39.     of a type I and II, and ignored for styles Y=1,3:
  40.   * esi = 0xXYRRGGBB - color of the header
  41.     * RR, GG, BB define color
  42.     * Y=0 - usual window, Y=1 - unmovable window
  43.     * X defines a gradient of header: X=0 - no gradient,
  44.       X=8 - usual gradient,
  45.       for windows of a type II X=4 - negative gradient
  46.     * other values of X and Y are reserved
  47.   * edi = 0x00RRGGBB - color of the frame
  48. Returned value:
  49.   * function does not return value
  50. Remarks:
  51.   * Position and sizes of the window are installed by the first
  52.     call of this function and are ignored at subsequent; to change
  53.     position and/or sizes of already created window use function 67.
  54.   * For windows with styles Y=3,4 and caption (A=1) caption string
  55.     is set by the first call of this function and is ignored
  56.     at subsequent (strictly speaking, is ignored after a call to
  57.     subfunction 2 of function 12 - end redraw); to change caption of
  58.     already created window use subfunction 1 of function 71.
  59.   * If the window has appropriate styles, position and/or sizes can be
  60.     changed by user. Current position and sizes can be obtained
  61.     by function 9.
  62.   * The window must fit on the screen. If the transferred
  63.     coordinates and sizes do not satisfy to this condition,
  64.     appropriate coordinate (or, probably, both) is considered as zero,
  65.     and if it does not help too, the appropriate size
  66.     (or, probably, both) is installed in a size of the screen.
  67.    
  68.     Further let us designate xpos,ypos,xsize,ysize - values passed
  69.     in ebx,ecx. The coordinates are resulted concerning
  70.     the left upper corner of the window, which, thus, is set as (0,0),
  71.     coordinates of the right lower corner essence (xsize,ysize).
  72.   * The sizes of the window are understood in sence of coordinates
  73.     of the right lower corner. This concerns all other functions too.
  74.     It means, that the real sizes are on 1 pixel more.
  75.   * The window of type I looks as follows:
  76.     * draw external frame of color indicated in edi, 1 pixel in width
  77.     * draw header - rectangle with the left upper corner (1,1) and
  78.       right lower (xsize-1,min(25,ysize)) color indicated in esi
  79.       (taking a gradient into account)
  80.     * if ysize>=26, fill the working area of the window -
  81.       rectangle with the left upper corner (1,21) and right lower
  82.       (xsize-1,ysize-1) (sizes (xsize-1)*(ysize-21)) with color
  83.       indicated in edx (taking a gradient into account)
  84.     * if A=1 and caption has been already set by subfunction 1
  85.       of function 71, it is drawn in the corresponding place of header
  86.   * The window of style Y=1 looks as follows:
  87.     * completely defined by the application
  88.   * The window of type II looks as follows:
  89.     * draw external frame of width 1 pixel with the "shaded" color
  90.       edi (all components of the color decrease twice)
  91.     * draw intermediate frame of width 3 pixels with color edi
  92.     * draw internal frame of width 1 pixel with the "shaded" color edi
  93.     * draw header - rectangle with the left upper corner (4,4)
  94.       and right lower (xsize-4,min(20,ysize)) color, indicated in esi
  95.       (taking a gradient into account)
  96.     * if ysize>=26, fill the working area of the window -
  97.       rectangle with the left upper corner (5,20) and right lower
  98.       (xsize-5,ysize-5) with color indicated in edx
  99.       (taking a gradient into account)
  100.     * if A=1 and caption has been already set by subfunction 1
  101.       of function 71, it is drawn in the corresponding place of header
  102.   * The skinned window looks as follows:
  103.     * draw external frame of width 1 pixel
  104.       with color 'outer' from the skin
  105.     * draw intermediate frame of width 3 pixel
  106.       with color 'frame' from the skin
  107.     * draw internal frame of width 1 pixel
  108.       with color 'inner' from the skin
  109.     * draw header (on bitmaps from the skin) in a rectangle
  110.       (0,0) - (xsize,_skinh-1)
  111.     * if ysize>=26, fill the working area of the window -
  112.       rectangle with the left upper corner (5,_skinh) and right lower
  113.       (xsize-5,ysize-5) with color indicated in edx
  114.       (taking a gradient into account)
  115.     * define two standard buttons: close and minimize
  116.       (see function 8)
  117.     * if A=1 and edi contains (nonzero) pointer to caption string,
  118.       it is drawn in place in header defined in the skin
  119.     * value _skinh is accessible as the result of call
  120.       subfunction 4 of function 48
  121.  
  122. ======================================================================
  123. ================ Function 1 - put pixel in the window. ===============
  124. ======================================================================
  125. Parameters:
  126.   * eax = 1 - function number
  127.   * ebx = x-coordinate (relative to the window)
  128.   * ecx = y-coordinate (relative to the window)
  129.   * edx = 0x00RRGGBB - color of a pixel
  130.     edx = 0x01xxxxxx - invert color of a pixel
  131.           (low 24 bits are ignored)
  132. Returned value:
  133.   * function does not return value
  134.  
  135. ======================================================================
  136. ============ Function 2 - get the code of the pressed key. ===========
  137. ======================================================================
  138. Takes away the code of the pressed key from the buffer.
  139. Parameters:
  140.   * eax = 2 - function number
  141. Returned value:
  142.   * if the buffer is empty, function returns eax=1
  143.   * if the buffer is not empty, function returns al=0,
  144.     ah=code of the pressed key, high word of eax is zero
  145.   * if there is "hotkey", function returns al=2,
  146.     ah=scancode of the pressed key (0 for control keys),
  147.     high word of eax contains a status of control keys at the moment
  148.     of pressing a hotkey
  149. Remarks:
  150.   * There is a common system buffer of the pressed keys
  151.     by a size of 120 bytes, organized as queue.
  152.   * There is one more common system buffer on 120 "hotkeys".
  153.   * If the application with the inactive window calls this function,
  154.     the buffer of the pressed keys is considered to be empty.
  155.   * By default this function returns ASCII-codes; to switch
  156.     to the scancodes mode (and back) use function 66.
  157.     However, hotkeys are always notificated as scancodes.
  158.   * To find out, what keys correspond to what codes, start
  159.     the application keyascii and scancode.
  160.   * Scancodes come directly from keyboard and are fixed;
  161.     ASCII-codes turn out with usage of the conversion tables,
  162.     which can be set by subfunction 2 of function 21
  163.     and get by subfunction 2 of function 26.
  164.   * As a consequence, ASCII-codes take into account current
  165.     keyboard layout (rus/en) as opposed to scancodes.
  166.   * This function notifies only about those hotkeys, which were
  167.     defined by this thread by subfunction 4 of function 66.
  168.  
  169. ======================================================================
  170. ==================== Function 3 - get system time. ===================
  171. ======================================================================
  172. Parameters:
  173.   * eax = 3 - function number
  174. Returned value:
  175.   * eax = 0x00SSMMHH, where HH:MM:SS = Hours:Minutes:Seconds
  176.   * each item is BCD-number, for example,
  177.     for time 23:59:59 function returns 0x00595923
  178. Remarks:
  179.   * See also subfunction 9 of function 26 - get time from
  180.     the moment of start of the system; it is more convenient, because
  181.     returns simply DWORD-value of the time counter.
  182.   * System time can be set by function 22.
  183.  
  184. ======================================================================
  185. ============ Function 4 - draw text string in the window. ============
  186. ======================================================================
  187. Parameters:
  188.   * eax = 4 - function number
  189.   * ebx = [coordinate on axis x]*65536 + [coordinate on axis y]
  190.   * ecx = 0xX0RRGGBB, where
  191.     * RR, GG, BB specify text color
  192.     * X=ABnn (bits):
  193.     * nn specifies the used font: 0=system monospaced,
  194.       1=system font of variable width
  195.     * A=0 - output esi characters, A=1 - output ASCIIZ-string
  196.     * B=1 - fill background with the color edi
  197.   * edx = pointer to the beginning of the string
  198.   * esi = for A=0 length of the string, must not exceed 255;
  199.           for A=1 is ignored
  200. Returned value:
  201.   * function does not return value
  202. Remarks:
  203.   * First system font is read out at loading from the file char.mt,
  204.     second - from char2.mt.
  205.   * Both fonts have height 9 pixels, width of the monospaced font
  206.     is equal to 6 pixels.
  207.  
  208. ======================================================================
  209. ========================= Function 5 - delay. ========================
  210. ======================================================================
  211. Delays execution of the program on the given time.
  212. Parameters:
  213.   * eax = 5 - function number
  214.   * ebx = time in the 1/100 of second
  215. Returned value:
  216.   * function does not return value
  217. Remarks:
  218.   * Passing ebx=0 does not transfer control to the next process
  219.     and does not make any operations at all. If it is really required
  220.     to transfer control to the next process (to complete a current
  221.     time slice), use subfunction 1 of function 68.
  222.  
  223. ======================================================================
  224. ============== Function 6 - read the file from ramdisk. ==============
  225. ======================================================================
  226. Parameters:
  227.   * eax = 6 - function number
  228.   * ebx = pointer to the filename
  229.   * ecx = number of start block, beginning from 1;
  230.     ecx=0 - read from the beginning of the file (same as ecx=1)
  231.   * edx = number of blocks to read;
  232.     edx=0 - read one block (same as edx=1)
  233.   * esi = pointer to memory area for the data
  234. Returned value:
  235.   * eax = file size in bytes, if the file was successfully read
  236.   * eax = -1, if the file was not found
  237. Remarks:
  238.   * This function is out-of-date; function 70 allows
  239.     to fulfil the same operations with the extended possibilities.
  240.   * Block = 512 bytes.
  241.   * For reading all file you can specify the certainly large value
  242.     in edx, for example, edx = -1; but in this case be ready that
  243.     the program will "fall", if the file will appear too large and can
  244.     not be placed in the program memory.
  245.   * The filename must be either in the format 8+3 characters
  246.     (first 8 characters - name itself, last 3 - extension,
  247.     the short names and extensions are supplemented with spaces),
  248.     or in the format 8.3 characters "FILE.EXT"/"FILE.EX "
  249.     (name no more than 8 characters, dot, extension 3 characters
  250.     supplemented if necessary by spaces).
  251.     The filename must be written with capital letters. The terminating
  252.     character with code 0 is not necessary (not ASCIIZ-string).
  253.   * This function does not support folders on the ramdisk.
  254.  
  255. ======================================================================
  256. =============== Function 7 - draw image in the window. ===============
  257. ======================================================================
  258. Paramters:
  259.   * eax = 7 - function number
  260.   * ebx = pointer to the image in the format BBGGRRBBGGRR...
  261.   * ecx = [size on axis x]*65536 + [size on axis y]
  262.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  263. Returned value:
  264.   * function does not return value
  265. Remarks:
  266.   * Coordinates of the image are coordinates of the upper left corner
  267.     of the image relative to the window.
  268.   * Size of the image in bytes is 3*xsize*ysize.
  269.  
  270. ======================================================================
  271. =============== Function 8 - define/delete the button. ===============
  272. ======================================================================
  273. Parameters for button definition:
  274.   * eax = 8 - function number
  275.   * ebx = [coordinate on axis x]*65536 + [size on axis x]
  276.   * ecx = [coordinate on axis y]*65536 + [size on axis y]
  277.   * edx = 0xXYnnnnnn, where:
  278.     * nnnnnn = identifier of the button
  279.     * high (31st) bit of edx is cleared
  280.     * if 30th bit of edx is set - do not draw the button
  281.     * if 29th bit of edx is set - do not draw a frame
  282.       at pressing the button
  283.   * esi = 0x00RRGGBB - color of the button
  284. Parameters for button deleting:
  285.   * eax = 8 - function number
  286.   * edx = 0x80nnnnnn, where nnnnnn - identifier of the button
  287. Returned value:
  288.   * function does not return value
  289. Remarks:
  290.   * Sizes of the button must be more than 0 and less than 0x8000.
  291.   * For skinned windows definition of the window
  292.     (call of 0th function) creates two standard buttons -
  293.     for close of the window with identifier 1 and
  294.     for minimize of the window with identifier 0xffff.
  295.   * The creation of two buttons with same identifiers is admitted.
  296.   * The button with the identifier 0xffff at pressing is interpreted
  297.     by the system as the button of minimization, the system handles
  298.     such pressing independently, not accessing to the application.
  299.     In rest it is usual button.
  300.   * Total number of buttons for all applications is limited to 4095.
  301.  
  302. ======================================================================
  303. ============ Function 9 - information on execution thread. ===========
  304. ======================================================================
  305. Parameters:
  306.   * eax = 9 - function number
  307.   * ebx = pointer to 1-Kb buffer
  308.   * ecx = number of the slot of the thread
  309.     ecx = -1 - get information on the current thread
  310. Returned value:
  311.   * eax = maximum number of the slot of a thread
  312.   * buffer pointed to by ebx contains the following information:
  313.     * +0: dword: usage of the processor (how many time units
  314.       per second leaves on execution of this thread)
  315.     * +4: word: position of the window of thread in the window stack
  316.     * +6: word: (has no relation to the specified thread)
  317.       number of the thread slot, which window has in the window stack
  318.       position ecx
  319.     * +8: word: reserved
  320.     * +10 = +0xA: 11 bytes: name of the process
  321.       (name of corresponding executable file in the format 8+3)
  322.     * +21 = +0x15: byte: reserved, this byte is not changed
  323.     * +22 = +0x16: dword: address of the process in memory
  324.     * +26 = +0x1A: dword: size of used memory - 1
  325.     * +30 = +0x1E: dword: identifier (PID/TID)
  326.     * +34 = +0x22: dword: coordinate of the thread window on axis x
  327.     * +38 = +0x26: dword: coordinate of the thread window on axis y
  328.     * +42 = +0x2A: dword: size of the thread window on axis x
  329.     * +46 = +0x2E: dword: size of the thread window on axis y
  330.     * +50 = +0x32: word: status of the thread slot:
  331.       * 0 = thread is running
  332.       * 1 = thread is suspended
  333.       * 2 = thread is suspended while waiting for event
  334.       * 3 = thread is terminating as a result of call to function -1
  335.         or under duress as a result of call to subfunction 2
  336.         of function 18 or termination of the system
  337.       * 4 = thread is terminating as a result of exception
  338.       * 5 = thread waits for event
  339.       * 9 = requested slot is free, all other information on the slot
  340.         is not meaningful
  341.     * +52 = +0x34: word: reserved, this word is not changed
  342.     * +54 = +0x36: dword: coordinate of the client area on axis x
  343.     * +58 = +0x3A: dword: coordinate of the client area on axis y
  344.     * +62 = +0x3E: dword: width of the client area
  345.     * +66 = +0x42: dword: height of the client area
  346.     * +70 = +0x46: byte: state of the window - bitfield
  347.       * bit 0 (mask 1): window is maximized
  348.       * bit 1 (mask 2): window is minimized to panel
  349.       * bit 2 (mask 4): window is rolled up
  350. Remarks:
  351.   * Slots are numbered starting from 1.
  352.   * Returned value is not a total number of threads, because there
  353.     can be free slots.
  354.   * When process is starting, system automatically creates
  355.     execution thread.
  356.   * Function gives information on the thread. Each process has
  357.     at least one thread. One process can create many threads,
  358.     in this case each thread has its own slot and the fields
  359.     +10, +22, +26 in these slots coincide.
  360.     Applications have no common way to define whether two threads
  361.     belong to one process.
  362.   * The active window - window on top of the window stack -
  363.     receives the messages on a keyboard input. For such window
  364.     the position in the window stack coincides with returned value.
  365.   * Slot 1 corresponds to special system thread, for which:
  366.     * the window is in the bottom of the window stack, the fields
  367.       +4 and +6 contain value 1
  368.     * name of the process - "OS/IDLE" (supplemented by spaces)
  369.     * address of the process in memory is 0, size of used memory is
  370.       16 Mb (0x1000000)
  371.     * PID=1
  372.     * coordinates and sizes of the window and the client area are by
  373.       convention set to 0
  374.     * status of the slot is always 0 (running)
  375.     * the execution time adds of time leaving on operations itself
  376.       and idle time in waiting for interrupt (which can be got by call
  377.       to subfunction 4 of function 18).
  378.   * Beginning from slot 2, the normal applications are placed.
  379.   * The normal applications are placed in memory at the address
  380.     0x60400000 (kernel constant 'std_application_base_address').
  381.     There is no intersection, as each process has its own page table.
  382.   * At creation of the thread it is assigned the slot
  383.     in the system table and identifier (Process/Thread IDentifier =
  384.     PID/TID), which do not vary with time for given thread.
  385.     After completion of the thread its slot can be anew used
  386.     for another thread. The thread identifier can not be assigned
  387.     to other thread even after completion of this thread.
  388.     Identifiers, assigned to new threads, grow monotonously.
  389.   * If the thread has not yet defined the window by call to
  390.     function 0, the position and the sizes
  391.     of its window are considered to be zero.
  392.   * Coordinates of the client area are relative to the window.
  393.   * At the moment only the part of the buffer by a size
  394.     71 = 0x37 bytes is used. Nevertheless it is recommended to use
  395.     1-Kb buffer for the future compatibility, in the future
  396.     some fields can be added.
  397.  
  398. ======================================================================
  399. ==================== Function 10 - wait for event. ===================
  400. ======================================================================
  401. If the message queue is empty, waits for appearance of the message
  402. in queue. In this state thread does not consume CPU time.
  403. Then reads out the message from queue.
  404.  
  405. Parameters:
  406.   * eax = 10 - function number
  407. Returned value:
  408.   * eax = event (see the list of events)
  409. Remarks:
  410.   * Those events are taken into account only which enter into
  411.     a mask set by function 40. By default it is
  412.     redraw, key and button events.
  413.   * To check, whether there is a message in queue, use function 11.
  414.     To wait for no more than given time, use function 23.
  415.  
  416. ======================================================================
  417. =============== Function 11 - check for event, no wait. ==============
  418. ======================================================================
  419. If the message queue contains event, function reads out
  420. and return it. If the queue is empty, function returns 0.
  421. Parameters:
  422.   * eax = 11 - function number
  423. Returned value:
  424.   * eax = 0 - message queue is empty
  425.   * else eax = event (see the list of events)
  426. Remarks:
  427.   * Those events are taken into account only, which enter into
  428.     a mask set by function 40. By default it is
  429.     redraw, key and button events.
  430.   * To wait for event, use function 10.
  431.     To wait for no more than given time, use function 23.
  432.  
  433. ======================================================================
  434. =============== Function 12 - begin/end window redraw. ===============
  435. ======================================================================
  436.  
  437. ---------------- Subfunction 1 - begin window redraw. ----------------
  438. Parameters:
  439.   * eax = 12 - function number
  440.   * ebx = 1 - subfunction number
  441. Returned value:
  442.   * function does not return value
  443.  
  444. ----------------- Subfunction 2 - end window redraw. -----------------
  445. Parameters:
  446.   * eax = 12 - function number
  447.   * ebx = 2 - subfunction number
  448. Returned value:
  449.   * function does not return value
  450. Remarks:
  451.   * Subfunction 1 deletes all buttons defined with
  452.     function 8, they must be defined again.
  453.  
  454. ======================================================================
  455. ============ Function 13 - draw a rectangle in the window. ===========
  456. ======================================================================
  457. Parameters:
  458.   * eax = 13 - function number
  459.   * ebx = [coordinate on axis x]*65536 + [size on axis x]
  460.   * ecx = [coordinate on axis y]*65536 + [size on axis y]
  461.   * edx = color 0xRRGGBB or 0x80RRGGBB for gradient fill
  462. Returned value:
  463.   * function does not return value
  464. Remarks:
  465.   * Coordinates are understood as coordinates of the left upper corner
  466.     of a rectangle relative to the window.
  467.  
  468. ======================================================================
  469. =================== Function 14 - get screen size. ===================
  470. ======================================================================
  471. Parameters:
  472.   * eax = 14 - function number
  473. Returned value:
  474.   * eax = [xsize]*65536 + [ysize], where
  475.   * xsize = x-coordinate of the right lower corner of the screen =
  476.             horizontal size - 1
  477.   * ysize = y-coordinate of the right lower corner of the screen =
  478.             vertical size - 1
  479. Remarks:
  480.   * See also subfunction 5 of function 48 - get sizes of
  481.     working area of the screen.
  482.  
  483. ======================================================================
  484. == Function 15, subfunction 1 - set a size of the background image. ==
  485. ======================================================================
  486. Parameters:
  487.   * eax = 15 - function number
  488.   * ebx = 1 - subfunction number
  489.   * ecx = width of the image
  490.   * edx = height of the image
  491. Returned value:
  492.   * function does not return value
  493. Remarks:
  494.   * Before calling subfunctions 2 and 5 you should call this function
  495.     to set image size!
  496.   * For update of the screen (after completion of a series of commands
  497.     working with a background) call subfunction 3.
  498.   * There is a pair function for get size of the background image -
  499.     subfunction 1 of function 39.
  500.  
  501. ======================================================================
  502. === Function 15, subfunction 2 - put pixel on the background image. ==
  503. ======================================================================
  504. Parameters:
  505.   * eax = 15 - function number
  506.   * ebx = 2 - subfunction number
  507.   * ecx = offset
  508.   * edx = color of a pixel 0xRRGGBB
  509. Returned value:
  510.   * function does not return value
  511. Remarks:
  512.   * Offset for a pixel with coordinates (x,y) is calculated as
  513.     (x+y*xsize)*3.
  514.   * If the given offset exceeds size set by subfunction 1,
  515.     the call is ignored.
  516.   * For update of the screen (after completion of a series of commands
  517.     working with a background) call subfunction 3.
  518.   * There is a pair function for get pixel on the background image -
  519.     subfunction 2 of function 39.
  520.  
  521. ======================================================================
  522. =========== Function 15, subfunction 3 - redraw background. ==========
  523. ======================================================================
  524. Parameters:
  525.   * eax = 15 - function number
  526.   * ebx = 3 - subfunction number
  527. Returned value:
  528.   * function does not return value
  529.  
  530. ======================================================================
  531. == Function 15, subfunction 4 - set drawing mode for the background. =
  532. ======================================================================
  533. Parameters:
  534.   * eax = 15 - function number
  535.   * ebx = 4 - subfunction number
  536.   * ecx = drawing mode:
  537.     * 1 = tile
  538.     * 2 = stretch
  539. Returned value:
  540.   * function does not return value
  541. Remarks:
  542.   * For update of the screen (after completion of a series of commands
  543.     working with a background) call subfunction 3.
  544.   * There is a pair function for get drawing mode of the background -
  545.     subfunction 4 of function 39.
  546.  
  547. ======================================================================
  548. ===================== Function 15, subfunction 5 =====================
  549. ============ Put block of pixels on the background image. ============
  550. ======================================================================
  551. Parameters:
  552.   * eax = 15 - function number
  553.   * ebx = 5 - subfunction number
  554.   * ecx = pointer to the data in the format BBGGRRBBGGRR...
  555.   * edx = offset in data of the background image
  556.   * esi = size of data in bytes = 3 * number of pixels
  557. Returned value:
  558.   * function does not return value
  559. Remarks:
  560.   * Offset and size are not checked for correctness.
  561.   * Color of each pixel is stored as 3-bytes value BBGGRR.
  562.   * Pixels of the background image are written sequentially
  563.     from left to right, from up to down.
  564.   * Offset of pixel with coordinates (x,y) is (x+y*xsize)*3.
  565.   * For update of the screen (after completion of a series of commands
  566.     working with a background) call subfunction 3.
  567.  
  568. ======================================================================
  569. ===================== Function 15, subfunction 6 =====================
  570. ======== Map background data to the address space of process. ========
  571. ======================================================================
  572. Parameters:
  573.   * eax = 15 - function number
  574.   * ebx = 6 - subfunction number
  575. Returned value:
  576.   * eax = pointer to background data, 0 if error
  577. Remarks:
  578.   * Mapped data are available for read and write.
  579.   * Size of background data is 3*xsize*ysize. The system blocks
  580.     changes of background sizes while process works with mapped data.
  581.   * Color of each pixel is stored as 3-bytes value BBGGRR.
  582.   * Pixels of the background image are written sequentially
  583.     from left to right, from up to down.
  584.  
  585. ======================================================================
  586. ===== Function 15, subfunction 7 - close mapped background data. =====
  587. ======================================================================
  588. Parameters:
  589.   * eax = 15 - function number
  590.   * ebx = 7 - subfunction number
  591.   * ecx = pointer to mapped data
  592. Returned value:
  593.   * eax = 1 - success, 0 - error
  594.  
  595. ======================================================================
  596. =============== Function 16 - save ramdisk on a floppy. ==============
  597. ======================================================================
  598. Parameters:
  599.   * eax = 16 - function number
  600.   * ebx = 1 or ebx = 2 - on which floppy save
  601. Returned value:
  602.   * eax = 0 - success
  603.   * eax = 1 - error
  604.  
  605. ======================================================================
  606. ======= Function 17 - get the identifier of the pressed button. ======
  607. ======================================================================
  608. Takes away the code of the pressed button from the buffer.
  609. Parameters:
  610.   * eax = 17 - function number
  611. Returned value:
  612.   * if the buffer is empty, function returns eax=1
  613.   * if the buffer is not empty:
  614.     * high 24 bits of eax contain button identifier (in particular,
  615.       ah contains low byte of the identifier; if all buttons have
  616.       the identifier less than 256, ah is enough to distinguish)
  617.     * al = 0 - the button was pressed with left mouse button
  618.     * al = bit corresponding to used mouse button otherwise
  619. Remarks:
  620.   * "Buffer" keeps only one button, at pressing the new button the
  621.     information about old is lost.
  622.   * The call of this function by an application with inactive window
  623.     will return answer "buffer is empty".
  624.   * Returned value for al corresponds to the state of mouse buttons
  625.     as in subfunction 2 of function 37 at the beginning
  626.     of button press, excluding lower bit, which is cleared.
  627.  
  628. ======================================================================
  629. = Function 18, subfunction 2 - terminate process/thread by the slot. =
  630. ======================================================================
  631. Parameters:
  632.   * eax = 18 - function number
  633.   * ebx = 2 - subfunction number
  634.   * ecx = number of the slot of process/thread
  635. Returned value:
  636.   * function does not return value
  637. Remarks:
  638.   * It is impossible to terminate system thread OS/IDLE (with
  639.     number of the slot 1),
  640.     it is possible to terminate any normal process/thread.
  641.   * See also subfunction 18 - terminate
  642.     process/thread by the identifier.
  643.  
  644. ======================================================================
  645. ===================== Function 18, subfunction 3 =====================
  646. ============= Make active the window of the given thread. ============
  647. ======================================================================
  648. Parameters:
  649.   * eax = 18 - function number
  650.   * ebx = 3 - subfunction number
  651.   * ecx = number of the thread slot
  652. Returned value:
  653.   * function does not return value
  654. Remarks:
  655.   * If correct, but nonexistent slot is given,
  656.     some window is made active.
  657.   * To find out, which window is active, use subfunction 7.
  658.  
  659. ======================================================================
  660. ===================== Function 18, subfunction 4 =====================
  661. =========== Get counter of idle time units per one second. ===========
  662. ======================================================================
  663. Idle time units are units, in which the processor stands idle
  664. in waiting for interrupt (in the command 'hlt').
  665.  
  666. Parameters:
  667.   * eax = 18 - function number
  668.   * ebx = 4 - subfunction number
  669. Returned value:
  670.   * eax = value of the counter of idle time units per one second
  671.  
  672. ======================================================================
  673. ========== Function 18, subfunction 5 - get CPU clock rate. ==========
  674. ======================================================================
  675. Parameters:
  676.   * eax = 18 - function number
  677.   * ebx = 5 - subfunction number
  678. Returned value:
  679.   * eax = clock rate (modulo 2^32 clock ticks = 4GHz)
  680.  
  681. ======================================================================
  682.  Function 18, subfunction 6 - save ramdisk to the file on hard drive.
  683. ======================================================================
  684. Parameters:
  685.   * eax = 18 - function number
  686.   * ebx = 6 - subfunction number
  687.   * ecx = pointer to the full path to file
  688.     (for example, "/hd0/1/kolibri/kolibri.img")
  689. Returned value:
  690.   * eax = 0 - success
  691.   * else eax = error code of the file system
  692. Remarks:
  693.   * All folders in the given path must exist, otherwise function
  694.     returns value 5, "file not found".
  695.  
  696. ======================================================================
  697. =========== Function 18, subfunction 7 - get active window. ==========
  698. ======================================================================
  699. Parameters:
  700.   * eax = 18 - function number
  701.   * ebx = 7 - subfunction number
  702. Returned value:
  703.   * eax = number of the active window
  704.     (number of the slot of the thread with active window)
  705. Remarks:
  706.   * Active window is at the top of the window stack and receives
  707.     messages on all keyboard input.
  708.   * To make a window active, use subfunction 3.
  709.  
  710. ======================================================================
  711. == Function 18, subfunction 8 - disable/enable the internal speaker. =
  712. ======================================================================
  713. If speaker sound is disabled, all calls to subfunction 55 of
  714. function 55 are ignored. If speaker sound is enabled,
  715. they are routed on builtin speaker.
  716.  
  717. ------------------- Subsubfunction 1 - get status. -------------------
  718. Parameters:
  719.   * eax = 18 - function number
  720.   * ebx = 8 - subfunction number
  721.   * ecx = 1 - number of the subsubfunction
  722. Returned value:
  723.   * eax = 0 - speaker sound is enabled; 1 - disabled
  724.  
  725. ----------------- Subsubfunction 2 - toggle status. ------------------
  726. Toggles states of disable/enable.
  727. Parameters:
  728.   * eax = 18 - function number
  729.   * ebx = 8 - subfunction number
  730.   * ecx = 2 - number of the subsubfunction
  731. Returned value:
  732.   * function does not return value
  733.  
  734. ======================================================================
  735. == Function 18, subfunction 9 - system shutdown with the parameter. ==
  736. ======================================================================
  737. Parameters:
  738.   * eax = 18 - function number
  739.   * ebx = 9 - subfunction number
  740.   * ecx = parameter:
  741.     * 2 = turn off computer
  742.     * 3 = reboot computer
  743.     * 4 = restart the kernel from the file 'kernel.mnt' on ramdisk
  744. Returned value:
  745.   * at incorrect ecx the registers do not change (i.e. eax=18)
  746.   * by correct call function always returns eax=0
  747.     as the tag of success
  748. Remarks:
  749.   * Do not rely on returned value by incorrect call, it can be
  750.     changed in future versions of the kernel.
  751.  
  752. ======================================================================
  753. ===== Function 18, subfunction 10 - minimize application window. =====
  754. ======================================================================
  755. Minimizes the own window.
  756. Parameters:
  757.   * eax = 18 - function number
  758.   * ebx = 10 - subfunction number
  759. Returned value:
  760.   * function does not return value
  761. Remarks:
  762.   * The minimized window from the point of view of function 9
  763.     keeps position and sizes.
  764.   * Restoring of an application window occurs at its activation by
  765.     subfunction 3.
  766.   * Usually there is no necessity to minimize/restire a window
  767.     obviously: minimization of a window is carried out by the system
  768.     at pressing the minimization button (for skinned windows
  769.     it is defined automatically by function 0,
  770.     for other windows it can be defined manually by function 8),
  771.     restore of a window is done by the application '@panel'.
  772.  
  773. ======================================================================
  774.  Function 18, subfunction 11 - get information on the disk subsystem.
  775. ======================================================================
  776. Parameters:
  777.   * eax = 18 - function number
  778.   * ebx = 11 - subfunction number
  779.   * ecx = type of the table:
  780.     * 1 = short version, 10 bytes
  781.     * 2 = full version, 65536 bytes
  782.   * edx = pointer to the buffer (in the application) for the table
  783. Returned value:
  784.   * function does not return value
  785. Format of the table: short version:
  786.   * +0: byte: information about FDD's (drives for floppies),
  787.     AAAABBBB, where AAAA gives type of the first drive, BBBB -
  788.     of the second regarding to the following list:
  789.     * 0 = there is no drive
  790.     * 1 = 360Kb, 5.25''
  791.     * 2 = 1.2Mb, 5.25''
  792.     * 3 = 720Kb, 3.5''
  793.     * 4 = 1.44Mb, 3.5''
  794.     * 5 = 2.88Mb, 3.5'' (such drives are not used anymore)
  795.     For example, for the standard configuration from one 1.44-drive
  796.     here will be 40h, and for the case 1.2Mb on A: and 1.44Mb on B:
  797.     the value is 24h.
  798.   * +1: byte: information about hard disks and CD-drives, AABBCCDD,
  799.     where AA corresponds to the controller IDE0, ..., DD - IDE3:
  800.     * 0 = device is absent
  801.     * 1 = hard drive
  802.     * 2 = CD-drive
  803.     For example, in the case HD on IDE0 and CD on IDE2
  804.     this field contains 48h.
  805.   * +2: 4 db: number of the retrieved partitions on hard disks
  806.     at accordingly IDE0,...,IDE3.
  807.     If the hard disk on IDEx is absent, appropriate byte is zero,
  808.     otherwise it shows number of the recognized partitions, which
  809.     can be not presented (if the drive is not formatted or if
  810.     the file system is not supported). Current version of the kernel
  811.     supports only FAT16, FAT32 and NTFS for hard disks.
  812.   * +6: 4 db: reserved
  813. Format of the table: full version:
  814.   * +0: 10 db: same as for the short version
  815.   * +10: 100 db: data for the first partition
  816.   * +110: 100 db: data for the second partition
  817.   * ...
  818.   * +10+100*(n-1): 100 db: data for the last partition
  819. The partitions are located as follows: at first sequentially all
  820. recoginzed partitions on HD on IDE0 (if present),
  821. then on HD on IDE1 (if present) and so on up to IDE3.
  822. Format of the information about partition
  823. (at moment only FAT is supported):
  824.   * +0: dword: first physical sector of the partition
  825.   * +4: dword: last physical sector of the partition
  826.     (belongs to the partition)
  827.   * +8: byte: file system type:
  828.     16=FAT16, 32=FAT32, 1=NTFS
  829.   * other data are dependent on file system, are modified with
  830.     kernel modifications and therefore are not described
  831. Remarks:
  832.   * The short table can be used for obtaining the information about
  833.     available devices.
  834.  
  835. ======================================================================
  836. ========== Function 18, subfunction 13 - get kernel version. =========
  837. ======================================================================
  838. Parameters:
  839.   * eax = 18 - function number
  840.   * ebx = 13 - subfunction number
  841.   * ecx = pointer to the buffer (not less than 16 bytes), where
  842.     the information will be placed
  843. Returned value:
  844.   * function does not return value
  845. Structure of the buffer:
  846. db a,b,c,d for version a.b.c.d
  847. db UID_xxx: one of UID_NONE=0, UID_MENUET=1, UID_KOLIBRI=2
  848. dd REV - kernel SVN revision number
  849. For Kolibri 0.7.1.0 kernel:
  850. db 0,7,0,0
  851. db 2
  852. dd 638
  853.  
  854. ======================================================================
  855. ======= Function 18, subfunction 14 - wait for screen retrace. =======
  856. ======================================================================
  857. Waits for the beginning of retrace of the scanning ray of the screen
  858. monitor.
  859. Parameters:
  860.   * eax = 18 - function number
  861.   * ebx = 14 - subfunction number
  862. Returned value:
  863.   * eax = 0 as the tag of success
  864. Remarks:
  865.   * Function is intended only for active high-efficiency graphics
  866.     applications; is used for smooth output of a graphics.
  867.  
  868. ======================================================================
  869. == Function 18, subfunction 15 - center mouse cursor on the screen. ==
  870. ======================================================================
  871. Parameters:
  872.   * eax = 18 - function number
  873.   * ebx = 15 - subfunction number
  874. Returned value:
  875.   * eax = 0 as the tag of success
  876.  
  877. ======================================================================
  878. ========= Function 18, subfunction 16 - get size of free RAM. ========
  879. ======================================================================
  880. Parameters:
  881.   * eax = 18 - function number
  882.   * ebx = 16 - subfunction number
  883. Returned value:
  884.   * eax = size of free memory in kilobytes
  885.  
  886. ======================================================================
  887. ======== Function 18, subfunction 17 - get full amount of RAM. =======
  888. ======================================================================
  889. Parameters:
  890.   * eax = 18 - function number
  891.   * ebx = 17 - subfunction number
  892. Returned value:
  893.   * eax = total size of existing memory in kilobytes
  894.  
  895. ======================================================================
  896. ===================== Function 18, subfunction 18 ====================
  897. ============= Terminate process/thread by the identifier. ============
  898. ======================================================================
  899. Parameters:
  900.   * eax = 18 - function number
  901.   * ebx = 18 - subfunction number
  902.   * ecx = identifer of process/thread (PID/TID)
  903. Returned value:
  904.   * eax = 0 - success
  905.   * eax = -1 - error (process is not found or is system)
  906. Remarks:
  907.   * It is impossible to terminate system thread OS/IDLE (identifier
  908.     1), it is possible to terminate any normal process/thread.
  909.   * See also subfunction 2 - terminate
  910.     process/thread by given slot.
  911.  
  912. ======================================================================
  913. ======== Function 18, subfunction 19 - get/set mouse features. =======
  914. ======================================================================
  915.  
  916. ---------------- Subsubfunction 0 - get mouse speed. -----------------
  917. Parameters:
  918.   * eax = 18 - function number
  919.   * ebx = 19 - subfunction number
  920.   * ecx = 0 - subsubfunction number
  921. Returned value:
  922.   * eax = current mouse speed
  923.  
  924. ---------------- Subsubfunction 1 - set mouse speed. -----------------
  925. Parameters:
  926.   * eax = 18 - function number
  927.   * ebx = 19 - subfunction number
  928.   * ecx = 1 - subsubfunction number
  929.   * edx = new value for speed
  930. Returned value:
  931.   * function does not return value
  932.  
  933. ---------------- Subsubfunction 2 - get mouse delay. -----------------
  934. Parameters:
  935.   * eax = 18 - function number
  936.   * ebx = 19 - subfunction number
  937.   * ecx = 2 - subsubfunction number
  938. Returned value:
  939.   * eax = current mouse delay
  940.  
  941. ---------------- Subsubfunction 3 - set mouse delay. -----------------
  942. Parameters:
  943.   * eax = 18 - function number
  944.   * ebx = 19 - subfunction number
  945.   * ecx = 3 - subsubfunction number
  946.   * edx = new value for mouse delay
  947. Returned value:
  948.   * function does not return value
  949.  
  950. ----------- Subsubfunction 4 - set mouse pointer position. -----------
  951. Parameters:
  952.   * eax = 18 - function number
  953.   * ebx = 19 - subfunction number
  954.   * ecx = 4 - subsubfunction number
  955.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  956. Returned value:
  957.   * function does not return value
  958.  
  959. -------- Subsubfunction 5 - simulate state of mouse buttons. ---------
  960. Parameters:
  961.   * eax = 18 - function number
  962.   * ebx = 19 - subfunction number
  963.   * ecx = 5 - subsubfunction number
  964.   * edx = information about emulated state of mouse buttons:
  965.     (same as return value in subfunction 2 of function 37)
  966.     * bit 0 is set = left button is pressed
  967.     * bit 1 is set = right button is pressed
  968.     * bit 2 is set = middle button is pressed
  969.     * bit 3 is set = 4th button is pressed
  970.     * bit 4 is set = 5th button is pressed
  971. Returned value:
  972.   * function does not return value
  973. Remarks:
  974.   * It is recommended to set speed of the mouse (in subsubfunction 1)
  975.     from 1 up to 9. The installed value is not inspected by the kernel
  976.     code, so set it carefully, at incorrect value the cursor
  977.     can "freeze". Speed of the mouse can be regulated through the
  978.     application SETUP.
  979.   * Recommended delay of the mouse (in subsubfunction 3) = 10. Lower
  980.     value is not handled by COM mice. At the very large values the
  981.     movement of the mouse on 1 pixel is impossible and the cursor will
  982.     jump on the value of installed speed (subsubfunction 1). The
  983.     installed value is not inspected by the kernel code.
  984.     Mouse delay can be regulated through the application SETUP.
  985.   * The subsubfunction 4 does not check the passed value. Before
  986.     its call find out current screen resolution (with function 14)
  987.     and check that the value of position is inside the limits of the
  988.     screen.
  989.  
  990. ======================================================================
  991. ======== Function 18, subfunction 20 - get information on RAM. =======
  992. ======================================================================
  993. Parameters:
  994.   * eax = 18 - function number
  995.   * ebx = 20 - subfunction number
  996.   * ecx = pointer to the buffer for information (36 bytes)
  997. Returned value:
  998.   * eax = total size of existing RAM in pages
  999.     or -1 if error has occured
  1000.   * buffer pointed to by ecx contains the following information:
  1001.     * +0:  dword: total size of existing RAM in pages
  1002.     * +4:  dword: size of free RAM in pages
  1003.     * +8:  dword: number of page faults (exceptions #PF)
  1004.                  in applications
  1005.     * +12: dword: size of kernel heap in bytes
  1006.     * +16: dword: free in kernel heap in bytes
  1007.     * +20: dword: total number of memory blocks in kernel heap
  1008.     * +24: dword: number of free memory blocks in kernel heap
  1009.     * +28: dword: size of maximum free block in kernel heap
  1010.                  (reserved)
  1011.     * +32: dword: size of maximum allocated block in kernel heap
  1012.                  (reserved)
  1013.  
  1014. ======================================================================
  1015. ===================== Function 18, subfunction 21 ====================
  1016. ======== Get slot number of process/thread by the identifier. ========
  1017. ======================================================================
  1018. Parameters:
  1019.   * eax = 18 - function number
  1020.   * ebx = 21 - subfunction number
  1021.   * ecx = identifer of process/thread (PID/TID)
  1022. Returned value:
  1023.   * eax = 0 - error (invalid identifier)
  1024.   * otherwise eax = slot number
  1025.  
  1026. ======================================================================
  1027. ===================== Function 18, subfunction 22 ====================
  1028. ============== Operations with window of another thread. =============
  1029. ======================================================================
  1030. Parameters:
  1031.   * eax = 18 - function number
  1032.   * ebx = 22 - subfunction number
  1033.   * ecx = operation type:
  1034.     * 0 = minimize window of the thread with given slot number
  1035.     * 1 = minimize window of the thread with given identifier
  1036.     * 2 = restore window of the thread with given slot number
  1037.     * 3 = restore window of the thread with given identifier
  1038.   * edx = parameter (slot number or PID/TID)
  1039. Returned value:
  1040.   * eax = 0 - success
  1041.   * eax = -1 - error (invalid identifier)
  1042. Remarks:
  1043.   * The thread can minimize its window with subfunction 10.
  1044.   * One can restore and activate window simultaneously with
  1045.     subfunction 3 (which requires slot number).
  1046.  
  1047. ======================================================================
  1048. ==================== Function 20 - MIDI interface. ===================
  1049. ======================================================================
  1050.  
  1051. ----------------------- Subfunction 1 - reset ------------------------
  1052. Parameters:
  1053.   * eax = 20 - function number
  1054.   * ebx = 1 - subfunction number
  1055.  
  1056. -------------------- Subfunction 2 - output byte ---------------------
  1057. Parameters:
  1058.   * eax = 20 - function number
  1059.   * ebx = 2 - subfunction number
  1060.   * cl = byte for output
  1061. Returned value (is the same for both subfunctions):
  1062.   * eax = 0 - success
  1063.   * eax = 1 - base port is not defined
  1064. Remarks:
  1065.   * Previously the base port must be defined by
  1066.     subfunction 1 of function 21.
  1067.  
  1068. ======================================================================
  1069. ======== Function 21, subfunction 1 - set MPU MIDI base port. ========
  1070. ======================================================================
  1071. Parameters:
  1072.   * eax = 21 - function number
  1073.   * ebx = 1 - subfunction number
  1074.   * ecx = number of base port
  1075. Returned value
  1076.   * eax = 0 - success
  1077.   * eax = -1 - erratic number of a port
  1078. Remarks:
  1079.   * Number of a port must satisfy to conditions 0x100<=ecx<=0xFFFF.
  1080.   * The installation of base is necessary for function 20.
  1081.   * To get base port use subfunction 1 of function 26.
  1082.  
  1083. ======================================================================
  1084. ========== Function 21, subfunction 2 - set keyboard layout. =========
  1085. ======================================================================
  1086. Keyboard layout is used to convert keyboard scancodes to ASCII-codes,
  1087. which will be read by function 2.
  1088. Parameters:
  1089.   * eax = 21 - function number
  1090.   * ebx = 2 - subfunction number
  1091.   * ecx = which layout to set:
  1092.     * 1 = normal layout
  1093.     * 2 = layout at pressed Shift
  1094.     * 3 = layout at pressed Alt
  1095.   * edx = pointer to layout - table of length 128 bytes
  1096. Or:
  1097.   * ecx = 9
  1098.   * dx = country identifier (1=eng, 2=fi, 3=ger, 4=rus)
  1099. Returned value:
  1100.   * eax = 0 - success
  1101.   * eax = 1 - incorrect parameter
  1102. Remarks:
  1103.   * If Alt is pressed, the layout with Alt is used;
  1104.     if Alt is not pressed, but Shift is pressed,
  1105.     the layout with Shift is used;
  1106.     if Alt and Shift are not pressed, but Ctrl is pressed, the normal
  1107.     layout is used and then from the code is subtracted 0x60;
  1108.     if no control key is pressed, the normal layout is used.
  1109.   * To get layout and country identifier use
  1110.     subfunction 2 of function 26.
  1111.   * Country identifier is global system variable, which is not used
  1112.     by the kernel itself; however the application '@panel' displays
  1113.     the corresponding icon.
  1114.   * The application @panel switches layouts on user request.
  1115.  
  1116. ======================================================================
  1117. ============== Function 21, subfunction 3 - set CD base. =============
  1118. ======================================================================
  1119. Parameters:
  1120.   * eax = 21 - function number
  1121.   * ebx = 3 - subfunction number
  1122.   * ecx = CD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1123. Returned value:
  1124.   * eax = 0
  1125. Remarks:
  1126.   * CD base is used by function 24.
  1127.   * To get CD base use subfunction 3 of function 26.
  1128.  
  1129. ======================================================================
  1130. ========== Function 21, subfunction 5 - set system language. =========
  1131. ======================================================================
  1132. Parameters:
  1133.   * eax = 21 - function number
  1134.   * ebx = 5 - subfunction number
  1135.   * ecx = system language (1=eng, 2=fi, 3=ger, 4=rus)
  1136. Returned value:
  1137.   * eax = 0
  1138. Remarks:
  1139.   * System language is global system variable and is not used
  1140.     by the kernel itself, however application @panel draws the
  1141.     appropriate icon.
  1142.   * Function does not check for correctness, as the kernel does not
  1143.     use this variable.
  1144.   * To get system language use subfunction 5 of function 26.
  1145.  
  1146. ======================================================================
  1147. ============== Function 21, subfunction 7 - set HD base. =============
  1148. ======================================================================
  1149. The HD base defines hard disk to write with usage of obsolete
  1150. syntax /HD in obsolete function 58; at usage of modern syntax
  1151. /HD0,/HD1,/HD2,/HD3 base is set automatically.
  1152. Parameters:
  1153.   * eax = 21 - function number
  1154.   * ebx = 7 - subfunction number
  1155.   * ecx = HD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1156. Returned value:
  1157.   * eax = 0
  1158. Remarks:
  1159.   * Any application at any time can change the base.
  1160.   * Do not change base, when any application works with hard disk.
  1161.     If you do not want system bugs.
  1162.   * To get HD base use subfunction 7 of function 26.
  1163.   * It is also necessary to define used partition of hard disk by
  1164.     subfunction 8.
  1165.  
  1166. ======================================================================
  1167. ========= Function 21, subfunction 8 - set used HD partition. ========
  1168. ======================================================================
  1169. The HD partition defines partition of the hard disk to write with
  1170. usage of obsolete syntax /HD and obsolete function 58;
  1171. at usage of functions 58 and 70 and modern syntax /HD0,/HD1,/HD2,/HD3
  1172. base and partition are set automatically.
  1173. Parameters:
  1174.   * eax = 21 - function number
  1175.   * ebx = 8 - subfunction number
  1176.   * ecx = HD partition (beginning from 1)
  1177. Return value:
  1178.   * eax = 0
  1179. Remarks:
  1180.   * Any application at any time can change partition.
  1181.   * Do not change partition when any application works with hard disk.
  1182.     If you do not want system bugs.
  1183.   * To get used partition use subfunction 8 of function 26.
  1184.   * There is no correctness checks.
  1185.   * To get the number of partitions of a hard disk use
  1186.     subfunction 11 of function 18.
  1187.   * It is also necessary to define used HD base by subfunction 7.
  1188.  
  1189. ======================================================================
  1190.  Function 21, subfunction 11 - enable/disable low-level access to HD.
  1191. ======================================================================
  1192. Parameters:
  1193.   * eax = 21 - function number
  1194.   * ebx = 11 - subfunction number
  1195.   * ecx = 0/1 - disable/enable
  1196. Returned value:
  1197.   * eax = 0
  1198. Remarks:
  1199.   * Is used in LBA-read (subfunction 8 of function 58).
  1200.   * The current implementation uses only low bit of ecx.
  1201.   * To get current status use subfunction 11 of function 26.
  1202.  
  1203. ======================================================================
  1204.  Function 21, subfunction 12 - enable/disable low-level access to PCI.
  1205. ======================================================================
  1206. Parameters:
  1207.   * eax = 21 - function number
  1208.   * ebx = 12 - subfunction number
  1209.   * ecx = 0/1 - disable/enable
  1210. Returned value:
  1211.   * eax = 0
  1212. Remarks:
  1213.   * Is used in operations with PCI bus (function 62).
  1214.   * The current implementation uses only low bit of ecx.
  1215.   * To get current status use subfunction 12 of function 26.
  1216.  
  1217. ======================================================================
  1218. ============ Function 21, subfunction 13, subsubfunction 1 ===========
  1219. ======== Initialize + get information on the driver vmode.mdr. =======
  1220. ======================================================================
  1221. Parameters:
  1222.   * eax = 21 - function number
  1223.   * ebx = 13 - subfunction number
  1224.   * ecx = 1 - number of the driver function
  1225.   * edx = pointer to 512-bytes buffer
  1226. Returned value:
  1227.   * if driver is not loaded
  1228.     (never happens in the current implementation):
  1229.     * eax = -1
  1230.     * ebx, ecx destroyed
  1231.   * if driver is loaded:
  1232.     * eax = 'MDAZ' (in fasm style, that is 'M' - low byte, 'Z' - high)
  1233.       - signature
  1234.     * ebx = current frequency of the scanning (in Hz)
  1235.     * ecx destroyed
  1236.     * buffer pointed to by edx is filled
  1237. Format of the buffer:
  1238.   * +0: 32*byte: driver name, "Trans VideoDriver"
  1239.     (without quotes, supplemented by spaces)
  1240.   * +32 = +0x20: dword: driver version (version x.y is encoded as
  1241.     y*65536+x), for the current implementation is 1 (1.0)
  1242.   * +36 = +0x24: 7*dword: reserved (0 in the current implementation)
  1243.   * +64 = +0x40: 32*word: list of supported videomodes (each word
  1244.     is number of a videomode, after list itself there are zeroes)
  1245.   * +128 = +0x80: 32*(5*word): list of supported frequences of the
  1246.     scannings for videomodes: for each videomode listed in the
  1247.     previous field up to 5 supported frequences are given
  1248.     (unused positions contain zeroes)
  1249. Remarks:
  1250.   * Function initializes the driver (if it is not initialized yet)
  1251.     and must be called first, before others (otherwise they will do
  1252.     nothing and return -1).
  1253.   * The current implementation supports only one frequency
  1254.     of the scanning on videomode.
  1255.  
  1256. ======================================================================
  1257. ============ Function 21, subfunction 13, subsubfunction 2 ===========
  1258. ================ Get information on current videomode. ===============
  1259. ======================================================================
  1260. Parameters:
  1261.   * eax = 21 - function number
  1262.   * ebx = 13 - subfunction number
  1263.   * ecx = 2 - number of the driver function
  1264. Returned value:
  1265.   * eax = -1 - driver is not loaded or not initialized;
  1266.     ebx,ecx are destroyed
  1267.   * eax = [width]*65536 + [height]
  1268.   * ebx = frequency of the vertical scanning (in Hz)
  1269.   * ecx = number of current videomode
  1270. Remarks:
  1271.   * Driver must be initialized by call to
  1272.     driver function 1.
  1273.   * If only screen sizes are required, it is more expedient to use
  1274.     function 14 taking into account that it
  1275.     returns sizes on 1 less.
  1276.  
  1277. ======================================================================
  1278. === Function 21, subfunction 13, subsubfunction 3 - set videomode. ===
  1279. ======================================================================
  1280. Parameters:
  1281.   * eax = 21 - function number
  1282.   * ebx = 13 - subfunction number
  1283.   * ecx = 3 - number of the driver function
  1284.   * edx = [scanning frequency]*65536 + [videomode number]
  1285. Returned value:
  1286.   * eax = -1 - driver is not loaded, not initialized or
  1287.     an error has occured
  1288.   * eax = 0 - success
  1289.   * ebx, ecx destroyed
  1290. Remarks:
  1291.   * Driver must be initialized by driver function 1.
  1292.   * The videomode number and frequency must be in the table
  1293.     returned by driver function 1.
  1294.  
  1295. ======================================================================
  1296. ============ Function 21, subfunction 13, subsubfunction 4 ===========
  1297. ================== Return to the initial videomode. ==================
  1298. ======================================================================
  1299. Returns the screen to the videomode set at system boot.
  1300. Parameters:
  1301.   * eax = 21 - function number
  1302.   * ebx = 13 - subfunction number
  1303.   * ecx = 4 - number of the driver function
  1304. Returned value:
  1305.   * eax = -1 - driver is not loaded or not initialized
  1306.   * eax = 0 - success
  1307.   * ebx, ecx destroyed
  1308. Remarks:
  1309.   * Driver must be initialized by call to driver function 1.
  1310.  
  1311. ======================================================================
  1312. ============ Function 21, subfunction 13, subsubfunction 5 ===========
  1313. ===== Increase/decrease the size of the visible area of monitor. =====
  1314. ======================================================================
  1315. Parameters:
  1316.   * eax = 21 - function number
  1317.   * ebx = 13 - subfunction number
  1318.   * ecx = 5 - number of the driver function
  1319.   * edx = 0/1 - decrease/increase horizontal size on 1 position
  1320.   * edx = 2/3 - is not supported in the current implementation;
  1321.     is planned as decrease/increase vertical size on 1 position
  1322. Returned value:
  1323.   * eax = -1 - driver is not loaded or not initialized
  1324.   * eax = 0 - success
  1325.   * ebx, ecx destroyed
  1326. Remarks:
  1327.   * Driver must be initialized by call to driver function 1.
  1328.   * Function influences only the physical size of the screen image;
  1329.     the logical size (number of pixels) does not change.
  1330.  
  1331. ======================================================================
  1332. ================= Function 22 - set system date/time. ================
  1333. ======================================================================
  1334. Parameters:
  1335.   * eax = 22 - function number
  1336.   * ebx = 0 - set time
  1337.     * ecx = 0x00SSMMHH - time in the binary-decimal code (BCD):
  1338.     * HH=hour 00..23
  1339.     * MM=minute 00..59
  1340.     * SS=second 00..59
  1341.   * ebx = 1 - set date
  1342.     * ecx = 0x00DDMMYY - date in the binary-decimal code (BCD):
  1343.     * DD=day 01..31
  1344.     * MM=month 01..12
  1345.     * YY=year 00..99
  1346.   * ebx = 2 - set day of week
  1347.     * ecx = 1 for Sunday, ..., 7 for Saturday
  1348.   * ebx = 3 - set alarm clock
  1349.     * ecx = 0x00SSMMHH
  1350. Returned value:
  1351.   * eax = 0 - success
  1352.   * eax = 1 - incorrect parameter
  1353.   * eax = 2 - CMOS-battery was unloaded
  1354. Remarks:
  1355.   * Value of installation of day of week seems to be doubtful,
  1356.     as it a little where is used
  1357.     (day of week can be calculated by date).
  1358.   * Alarm clock can be set on operation in the given time every day.
  1359.     But there is no existing system function to disable it.
  1360.   * Operation of alarm clock consists in generation IRQ8.
  1361.   * Generally CMOS supports for alarm clock set of value 0xFF
  1362.     as one of parameters and it means that the appropriate parameter
  1363.     is ignored. But current implementation does not allow this
  1364.     (will return 1).
  1365.   * Alarm clock is a global system resource; the set of
  1366.     an alarm clock cancels automatically the previous set.
  1367.     However, at moment no program uses it.
  1368.  
  1369. ======================================================================
  1370. ============= Function 23 - wait for event with timeout. =============
  1371. ======================================================================
  1372. If the message queue is empty, waits for new message in the queue,
  1373. but no more than given time. Then reads out a message from the queue.
  1374.  
  1375. Parameters:
  1376.   * eax = 23 - function number
  1377.   * ebx = timeout (in 1/100 of second)
  1378. Returned value:
  1379.   * eax = 0 - the message queue is empty
  1380.   * otherwise eax = event (see the list of events)
  1381. Remarks:
  1382.   * Only those events are taken into account, which enter into
  1383.     the mask set by function 40. By default it is
  1384.     redraw, key and button events.
  1385.   * To check for presence of a message in the queue use function 11.
  1386.     To wait without timeout use function 10.
  1387.   * Transmission ebx=0 results in immediate returning eax=0.
  1388.   * Current implementation returns immediately with eax=0,
  1389.     if the addition of ebx with the current value of time counter
  1390.     makes 32-bit overflow.
  1391.  
  1392. ======================================================================
  1393. ======== Function 24, subfunction 1 - begin to play CD-audio. ========
  1394. ======================================================================
  1395. Parameters:
  1396.   * eax = 24 - function number
  1397.   * ebx = 1 - subfunction number
  1398.   * ecx = 0x00FRSSMM, where
  1399.     * MM = starting minute
  1400.     * SS = starting second
  1401.     * FR = starting frame
  1402. Returned value:
  1403.   * eax = 0 - success
  1404.   * eax = 1 - CD base is not defined
  1405. Remarks:
  1406.   * Previously CD base must be defined by the call to
  1407.     subfunction 3 of function 21.
  1408.   * One second includes 75 frames, one minute includes 60 seconds.
  1409.   * The function is asynchronous (returns control, when play begins).
  1410.  
  1411. ======================================================================
  1412. ======= Function 24, subfunction 2 - get information on tracks. ======
  1413. ======================================================================
  1414. Parameters:
  1415.   * eax = 24 - function number
  1416.   * ebx = 2 - subfunction number
  1417.   * ecx = pointer to the buffer for the table
  1418.     (maximum 8*64h+4 bytes=100 tracks)
  1419. Returned value:
  1420.   * eax = 0 - success
  1421.   * eax = 1 - CD base is not defined
  1422. Remarks:
  1423.   * The format of the table with tracks information is the same as
  1424.     for ATAPI-CD command 43h (READ TOC), usual table (subcommand 00h).
  1425.     Function returns addresses in MSF.
  1426.   * Previously CD base port must be set by call to
  1427.     subfunction 3 of function 21.
  1428.   * Function returns information only about no more than 100
  1429.     first tracks. In most cases it is enough.
  1430.  
  1431. ======================================================================
  1432. ========== Function 24, subfunction 3 - stop play CD-audio. ==========
  1433. ======================================================================
  1434. Parameters:
  1435.   * eax = 24 - function number
  1436.   * ebx = 1 - subfunction number
  1437. Returned value:
  1438.   * eax = 0 - success
  1439.   * eax = 1 - CD base is not defined
  1440. Remarks:
  1441.   * Previously CD base port must be defined by call to
  1442.     subfunction 3 of function 21.
  1443.  
  1444. ======================================================================
  1445. ======= Function 24, subfunction 4 - eject tray of disk drive. =======
  1446. ======================================================================
  1447. Parameters:
  1448.   * eax = 24 - function number
  1449.   * ebx = 4 - subfunction number
  1450.   * ecx = position of CD/DVD-drive
  1451.       (from 0=Primary Master to 3=Secondary Slave)
  1452. Returned value:
  1453.   * function does not return value
  1454. Remarks:
  1455.   * The function is supported only for ATAPI devices (CD and DVD).
  1456.   * When the tray is being ejected,
  1457.     manual control of tray is unlocked.
  1458.   * When the tray is being ejected, the code clears the cache for
  1459.     corresponding device.
  1460.   * An example of usage of the function is the application CD_tray.
  1461.  
  1462. ======================================================================
  1463. ======== Function 24, subfunction 5 - load tray of disk drive. =======
  1464. ======================================================================
  1465. Parameters:
  1466.   * eax = 24 - function number
  1467.   * ebx = 5 - subfunction number
  1468.   * ecx = position of CD/DVD-drive
  1469.       (from 0=Primary Master to 3=Secondary Slave)
  1470. Returned value:
  1471.   * function does not return value
  1472. Remarks:
  1473.   * The function is supported only for ATAPI devices (CD and DVD).
  1474.   * An example of usage of the function is the application CD_tray.
  1475.  
  1476. ======================================================================
  1477. ======== Function 26, subfunction 1 - get MPU MIDI base port. ========
  1478. ======================================================================
  1479. Parameters:
  1480.   * eax = 26 - function number
  1481.   * ebx = 1 - subfunction number
  1482. Returned value:
  1483.   * eax = port number
  1484. Parameters:
  1485.   * To set base port use subfunction 1 of function 21.
  1486.  
  1487. ======================================================================
  1488. ========== Function 26, subfunction 2 - get keyboard layout. =========
  1489. ======================================================================
  1490. The keyboard layout is used to convert keyboard scancodes to
  1491. ASCII-codes for function 2.
  1492. Parameters:
  1493.   * eax = 26 - function number
  1494.   * ebx = 2 - subfunction number
  1495.   * ecx = what layout to get:
  1496.     * 1 = normal layout
  1497.     * 2 = layout with pressed Shift
  1498.     * 3 = layout with pressed Alt
  1499.   * edx = pointer to the 128-bytes buffer, where the layout will be
  1500.     copied
  1501. Returned value:
  1502.   * function does not return value
  1503. Or:
  1504.   * eax = 26 - function number
  1505.   * ebx = 2 - subfunction number
  1506.   * ecx = 9
  1507. Returned value:
  1508.   * eax = country identifier (1=eng, 2=fi, 3=ger, 4=rus)
  1509. Remarks:
  1510.   * If Alt is pressed, the layout with Alt is used;
  1511.     if Alt is not pressed, but Shift is pressed,
  1512.     the layout with Shift is used;
  1513.     if Alt and Shift are not pressed, but Ctrl is pressed, the normal
  1514.     layout is used and then from the code is subtracted 0x60;
  1515.     if no control key is pressed, the normal layout is used.
  1516.   * To set layout and country identifier use
  1517.     subfunction 2 of function 21.
  1518.   * Country identifier is global system variable, which is not used
  1519.     by the kernel itself; however the application '@panel' displays
  1520.     the corresponding icon (using this function).
  1521.   * The application @panel switches layouts on user request.
  1522.  
  1523. ======================================================================
  1524. ============== Function 26, subfunction 3 - get CD base. =============
  1525. ======================================================================
  1526. Parameters:
  1527.   * eax = 26 - function number
  1528.   * ebx = 3 - subfunction number
  1529. Returned value:
  1530.   * eax = CD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1531. Remarks:
  1532.   * CD base is used by function 24.
  1533.   * To set CD base use subfunction 3 of function 21.
  1534.  
  1535. ======================================================================
  1536. ========== Function 26, subfunction 5 - get system language. =========
  1537. ======================================================================
  1538. Parameters:
  1539.   * eax = 26 - function number
  1540.   * ebx = 5 - subfunction number
  1541. Returned value:
  1542.   * eax = system language (1=eng, 2=fi, 3=ger, 4=rus)
  1543. Remarks:
  1544.   * System language is global system variable and is not used
  1545.     by the kernel itself, however application @panel draws the
  1546.     appropriate icon (using this function).
  1547.   * To set system language use subfunction 5 of function 21.
  1548.  
  1549. ======================================================================
  1550. ============== Function 26, subfunction 7 - get HD base. =============
  1551. ======================================================================
  1552. The HD base defines hard disk to write with usage of obsolete
  1553. syntax /HD in obsolete function 58; at usage of modern syntax
  1554. /HD0,/HD1,/HD2,/HD3 base is set automatically.
  1555. Parameters:
  1556.   * eax = 26 - function number
  1557.   * ebx = 7 - subfunction number
  1558. Returned value:
  1559.   * eax = HD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1560. Remarks:
  1561.   * Any application in any time can change HD base.
  1562.   * To set base use subfunction 7 of function 21.
  1563.   * To get used partition of hard disk use subfunction 8.
  1564.  
  1565. ======================================================================
  1566. ========= Function 26, subfunction 8 - get used HD partition. ========
  1567. ======================================================================
  1568. The HD partition defines partition of the hard disk to write with
  1569. usage of obsolete syntax /HD in obsolete function 58;
  1570. at usage of functions 58 and 70 and modern syntax /HD0,/HD1,/HD2,/HD3
  1571. base and partition are set automatically.
  1572. Parameters:
  1573.   * eax = 26 - function number
  1574.   * ebx = 8 - subfunction number
  1575. Returned value:
  1576.   * eax = HD partition (beginning from 1)
  1577. Remarks:
  1578.   * Any application in any time can change partition.
  1579.   * To set partition use subfunction 8 of function 21.
  1580.   * To get number of partitions on a hard disk use
  1581.     subfunction 11 of function 18.
  1582.   * To get base of used hard disk, use subfunction 7.
  1583.  
  1584. ======================================================================
  1585. === Function 26, subfunction 9 - get the value of the time counter. ==
  1586. ======================================================================
  1587. Parameters:
  1588.   * eax = 26 - function number
  1589.   * ebx = 9 - subfunction number
  1590. Returned value:
  1591.   * eax = number of 1/100s of second, past from the system boot time
  1592. Remarks:
  1593.   * Counter takes modulo 2^32, that correspond to a little more
  1594.     than 497 days.
  1595.   * To get system time use function 3.
  1596.  
  1597. ======================================================================
  1598. ===================== Function 26, subfunction 11 ====================
  1599. ========== Find out whether low-level HD access is enabled. ==========
  1600. ======================================================================
  1601. Parameters:
  1602.   * eax = 26 - function number
  1603.   * ebx = 11 - subfunction number
  1604. Returned value:
  1605.   * eax = 0/1 - disabled/enabled
  1606. Remarks:
  1607.   * Is used in LBA read (subfunction 8 of function 58).
  1608.   * To set current state use subfunction 11 of function 21.
  1609.  
  1610. ======================================================================
  1611. ===================== Function 26, subfunction 12 ====================
  1612. ========== Find out whether low-level PCI access is enabled. =========
  1613. ======================================================================
  1614. Parameters:
  1615.   * eax = 26 - function number
  1616.   * ebx = 12 - subfunction number
  1617. Returned value:
  1618.   * eax = 0/1 - disabled/enabled
  1619. Remarks:
  1620.   * Is used by operations with PCI bus (function 62).
  1621.   * The current implementation uses only low bit of ecx.
  1622.   * To set the current state use subfunction 12 of function 21.
  1623.  
  1624. ======================================================================
  1625. =================== Function 29 - get system date. ===================
  1626. ======================================================================
  1627. Parameters:
  1628.   * eax = 29 - function number
  1629. Returned value:
  1630.   * eax = 0x00DDMMYY, where
  1631.     (binary-decimal coding, BCD, is used)
  1632.   * YY = two low digits of year (00..99)
  1633.   * MM = month (01..12)
  1634.   * DD = day (01..31)
  1635. Remarks:
  1636.   * To set system date use function 22.
  1637.  
  1638. ======================================================================
  1639. ============= Function 30 - work with the current folder. ============
  1640. ======================================================================
  1641.  
  1642. --------- Subfunction 1 - set current folder for the thread. ---------
  1643. Parameters:
  1644.   * eax = 30 - function number
  1645.   * ebx = 1 - subfunction number
  1646.   * ecx = pointer to ASCIIZ-string with the path to new current folder
  1647. Returned value:
  1648.   * function does not return value
  1649.  
  1650. --------- Subfunction 2 - get current folder for the thread. ---------
  1651. Parameters:
  1652.   * eax = 30 - function number
  1653.   * ebx = 2 - subfunction number
  1654.   * ecx = pointer to buffer
  1655.   * edx = size of buffer
  1656. Returned value:
  1657.   * eax = size of the current folder's name (including terminating 0)
  1658. Remarks:
  1659.   * If the buffer is too small to hold all data, only first (edx-1)
  1660.     bytes are copied and than terminating 0 is inserted.
  1661.  
  1662. ======================================================================
  1663. =============== Function 32 - delete file from ramdisk. ==============
  1664. ======================================================================
  1665. Parameters:
  1666.   * eax = 32 - function number
  1667.   * ebx = pointer to the filename
  1668. Returned value:
  1669.   * eax = 0 - success; otherwise file system error code
  1670. Remarks:
  1671.   * This function is obsolete; function 58 allows to fulfill
  1672.     the same operations with the extended possibilities.
  1673.   * The current implementation returns only values 0(success) and
  1674.     5(file not found).
  1675.   * The filename must be either in the format 8+3 characters
  1676.     (first 8 characters - name itself, last 3 - extension,
  1677.     the short names and extensions are supplemented with spaces),
  1678.     or in the format 8.3 characters "FILE.EXT"/"FILE.EX "
  1679.     (name no more than 8 characters, dot, extension 3 characters
  1680.     supplemented if necessary by spaces).
  1681.     The filename must be written with capital letters. The terminating
  1682.     character with code 0 is not necessary (not ASCIIZ-string).
  1683.   * This function does not support folders on the ramdisk.
  1684.  
  1685. ======================================================================
  1686. ================ Function 33 - write file to ramdisk. ================
  1687. ======================================================================
  1688. Parameters:
  1689.   * eax = 33 - function number
  1690.   * ebx = pointer to the filename
  1691.   * ecx = pointer to data for writing
  1692.   * edx = number of bytes for writing
  1693.   * should be set esi=0
  1694. Returned value:
  1695.   * eax = 0 - success, otherwise file system error code
  1696. Remarks:
  1697.   * This function is obsolete; function 70 allows to fulfil
  1698.     the same operations with extended possibilities.
  1699.   * If esi contains non-zero value and selected file already exists,
  1700.     one more file with the same name will be created.
  1701.   * Otherwise file will be overwritten.
  1702.   * The filename must be either in the format 8+3 characters
  1703.     (first 8 characters - name itself, last 3 - extension,
  1704.     the short names and extensions are supplemented with spaces),
  1705.     or in the format 8.3 characters "FILE.EXT"/"FILE.EX "
  1706.     (name no more than 8 characters, dot, extension 3 characters
  1707.     supplemented if necessary by spaces).
  1708.     The filename must be written with capital letters. The terminating
  1709.     character with code 0 is not necessary (not ASCIIZ-string).
  1710.   * This function does not support folders on the ramdisk.
  1711.  
  1712. ======================================================================
  1713. ======= Function 35 - read the color of a pixel on the screen. =======
  1714. ======================================================================
  1715. Parameters:
  1716.   * eax = 35
  1717.   * ebx = y*xsize+x, where
  1718.   * (x,y) = coordinates of a pixel (beginning from 0)
  1719.   * xsize = horizontal screen size
  1720. Returned value:
  1721.   * eax = color 0x00RRGGBB
  1722. Remarks:
  1723.   * To get screen sizes use function 14. Pay attention,
  1724.     that it subtracts 1 from both sizes.
  1725.   * There is also direct access (without any system calls)
  1726.     to videomemory through the selector gs. To get parameters of
  1727.     the current videomode, use function 61.
  1728.  
  1729. ======================================================================
  1730. =================== Function 36 - read screen area. ==================
  1731. ======================================================================
  1732. Paramters:
  1733.   * eax = 36 - function number
  1734.   * ebx = pointer to the previously allocated memory area,
  1735.         where will be placed the image in the format BBGGRRBBGGRR...
  1736.   * ecx = [size on axis x]*65536 + [size on axis y]
  1737.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  1738. Returned value:
  1739.   * function does not return value
  1740. Remarks:
  1741.   * Coordinates of the image are coordinates of the upper left corner
  1742.     of the image relative to the screen.
  1743.   * Size of the image in bytes is 3*xsize*ysize.
  1744.  
  1745. ======================================================================
  1746. =================== Function 37 - work with mouse. ===================
  1747. ======================================================================
  1748.  
  1749. ---------- Subfunction 0 - screen coordinates of the mouse -----------
  1750. Parameters:
  1751.   * eax = 37 - function number
  1752.   * ebx = 0 - subfunction number
  1753. Returned value:
  1754.   * eax = x*65536 + y, (x,y)=coordinates of the mouse pointer
  1755.     (beginning from 0)
  1756.  
  1757. -- Subfunction 1 - coordinates of the mouse relative to the window ---
  1758. Parameters:
  1759.   * eax = 37 - function number
  1760.   * ebx = 1 - subfunction number
  1761. Returned value:
  1762.   * eax = x*65536 + y, (x,y)=coordinates of the mouse pointer
  1763.     relative to the application window (beginning from 0)
  1764. Remarks:
  1765.   * The value is calculated by formula (x-xwnd)*65536 + (y-ywnd).
  1766.     If y>=ywnd, the low word is non-negative and contains
  1767.     relative y-coordinate, and the high word - relative x-coordinate
  1768.     (with correct sign). Otherwise the low word is negative and still
  1769.     contains relative y-coordinate, and to the high word
  1770.     1 should be added.
  1771.  
  1772. ------------ Subfunction 2 - pressed buttons of the mouse ------------
  1773. Parameters:
  1774.   * eax = 37 - function number
  1775.   * ebx = 2 - subfunction number
  1776. Returned value:
  1777.   * eax contains information on the pressed mouse buttons:
  1778.   * bit 0 is set = left button is pressed
  1779.   * bit 1 is set = right button is pressed
  1780.   * bit 2 is set = middle button is pressed
  1781.   * bit 3 is set = 4th button is pressed
  1782.   * bit 4 is set = 5th button is pressed
  1783.   * other bits are cleared
  1784.  
  1785. -------------------- Subfunction 4 - load cursor ---------------------
  1786. Parameters:
  1787.   * eax = 37 - function number
  1788.   * ebx = 4 - subfunction number
  1789.   * dx = data source:
  1790.   * dx = LOAD_FROM_FILE = 0 - data in a file
  1791.     * ecx = pointer to full path to the cursor file
  1792.     * the file must be in the format .cur, which is standard for
  1793.       MS Windows, at that of the size 32*32 pixels
  1794.   * dx = LOAD_FROM_MEM = 1 - data of file are already loaded in memory
  1795.     * ecx = pointer to data of the cursor file
  1796.     * the data format is the same as in the previous case
  1797.   * dx = LOAD_INDIRECT = 2 - data in memory
  1798.     * ecx = pointer to cursor image in the format ARGB 32*32 pixels
  1799.     * edx = 0xXXYY0002, where
  1800.       * XX = x-coordinate of cursor hotspot
  1801.       * YY = y-coordinate
  1802.       * 0 <= XX, YY <= 31
  1803. Returned value:
  1804.   * eax = 0 - failed
  1805.   * otherwise eax = cursor handle
  1806.  
  1807. --------------------- Subfunction 5 - set cursor ---------------------
  1808. Sets new cursor for the window of the current thread.
  1809. Parameters:
  1810.   * eax = 37 - function number
  1811.   * ebx = 5 - subfunction number
  1812.   * ecx = cursor handle
  1813. Returned value:
  1814.   * eax = handle of previous cursor
  1815. Remarks:
  1816.   * If the handle is incorrect, the function restores the default
  1817.     cursor (standard arrow). In particular, ecx=0 restores it.
  1818.  
  1819. ------------------- Subfunction 6 - delete cursor --------------------
  1820. Parameters:
  1821.   * eax = 37 - function number
  1822.   * ebx = 6 - subfunction number
  1823.   * ecx = cursor handle
  1824. Returned value:
  1825.   * eax destroyed
  1826. Remarks:
  1827.   * The cursor must be loaded previously by the current thread
  1828.     (with the call to subfunction 4). The function does not delete
  1829.     system cursors and cursors, loaded by another applications.
  1830.   * If the active cursor (set by subfunction 5) is deleted,
  1831.     the system restores the default cursor (standard arrow).
  1832.  
  1833. ------------------ Subfunction 7 - get scroll data -------------------
  1834. Parameters:
  1835.   * eax = 37 - function number
  1836.   * ebx = 7 - subfunction number
  1837. Returned value:
  1838.   * eax = [horizontal offset]*65536 + [vertical offset]
  1839. Remarks:
  1840.   * Scroll data is available for active window only.
  1841.   * Values are zeroed after reading.
  1842.   * Values are signed.
  1843.  
  1844. ======================================================================
  1845. ====================== Function 38 - draw line. ======================
  1846. ======================================================================
  1847. Parameters:
  1848.   * eax = 38 - function number
  1849.   * ebx = [start coordinate on axis x]*65536 +
  1850.               [end coordinate on axis x]
  1851.   * ecx = [start coordinate on axis y]*65536 +
  1852.               [end coordinate on axis y]
  1853.   * edx = 0x00RRGGBB - color
  1854.     edx = 0x01xxxxxx - draw inversed line
  1855.           (low 24 bits are ignored)
  1856. Returned value:
  1857.   * function does not return value
  1858. Remarks:
  1859.   * Coordinates are relative to the window.
  1860.   * End point is also drawn.
  1861.  
  1862. ======================================================================
  1863. == Function 39, subfunction 1 - get a size of the background image. ==
  1864. ======================================================================
  1865. Parameters:
  1866.   * eax = 39 - function number
  1867.   * ebx = 1 - subfunction number
  1868. Returned value:
  1869.   * eax = [width]*65536 + [height]
  1870. Remarks:
  1871.   * There is a pair function to set sizes of background image -
  1872.     subfunction 1 of function 15. After which it is necessary,
  1873.     of course, anew to define image.
  1874.  
  1875. ======================================================================
  1876. == Function 39, subfunction 2 - get pixel from the background image. =
  1877. ======================================================================
  1878. Parameters:
  1879.   * eax = 39 - function number
  1880.   * ebx = 2 - subfunction number
  1881.   * ecx = offset
  1882. Returned value:
  1883.   * eax = 0x00RRGGBB - pixel color, if offset is valid
  1884.     (less than 0x160000-16)
  1885.   * eax = 2 otherwise
  1886. Remarks:
  1887.   * Do not rely on returned value for invalid offsets, it may be
  1888.     changed in future kernel versions.
  1889.   * Offset for pixel with coordinates (x,y)
  1890.     is calculated as (x+y*xsize)*3.
  1891.   * There is a pair function to set pixel on the background image -
  1892.     subfunction 2 of function 15.
  1893.  
  1894. ======================================================================
  1895. == Function 39, subfunction 4 - get drawing mode for the background. =
  1896. ======================================================================
  1897. Parameters:
  1898.   * eax = 39 - function number
  1899.   * ebx = 4 - subfunction number
  1900. Returned value:
  1901.   * eax = 1 - tile
  1902.   * eax = 2 - stretch
  1903. Remarks:
  1904.   * There is a pair function to set drawing mode -
  1905.     subfunction 4 of function 15.
  1906.  
  1907. ======================================================================
  1908. =========== Function 40 - set the mask for expected events. ==========
  1909. ======================================================================
  1910. The mask for expected events affects function working with events
  1911. 10, 11, 23 - they notify only about events allowed by this mask.
  1912. Parameters:
  1913.   * eax = 40 - function number
  1914.   * ebx = mask: bit i corresponds to event i+1 (see list of events)
  1915.     (set bit permits notice on event)
  1916. Returned value:
  1917.   * function does not return value
  1918. Remarks:
  1919.   * Default mask (7=111b) enables nofices about redraw,
  1920.     keys and buttons. This is enough for many applications.
  1921.   * Events prohibited in the mask are saved anyway, when come;
  1922.     they are simply not informed with event functions.
  1923.   * Event functions take into account the mask on moment of
  1924.     function call, not on moment of event arrival.
  1925.  
  1926. ======================================================================
  1927. ==================== Function 41 - get IRQ owner. ====================
  1928. ======================================================================
  1929. Parameters:
  1930.   * eax = 41 - function number
  1931.   * ebx = IRQ number, 0..15
  1932. Returned value:
  1933.   * eax = owner PID
  1934.   * eax = 0, if there is no owner
  1935.   * eax = -1 for incorrect ebx
  1936.  
  1937. ======================================================================
  1938. ================== Function 42 - work with IRQ data. =================
  1939. ======================================================================
  1940. When an IRQ occurs, the system reads data from ports indicated
  1941. earlier by function 44 and writes this data to
  1942. internal buffer. This function reads out data from that buffer.
  1943.  
  1944. --------------------- Subfunction 0 - read data ----------------------
  1945. Parameters:
  1946.   * eax = 42 - function number
  1947.   * bl = IRQ number, 0..15
  1948.   * bh = 0 - subfunction number
  1949.   * rest of ebx must be zeroed
  1950.   * ecx = pointer to a buffer with size not less than 4000 bytes
  1951. Returned value: (use value of eax to distinguish)
  1952.   * if the thread is not IRQ owner
  1953.     (or IRQ number is incorrect): eax = -1
  1954.   * if there is no data: eax = 0
  1955.   * if all is ok:
  1956.     eax = size of data read (in bytes)
  1957.  
  1958. ------------- Subfunction 1 - get size of data in buffer -------------
  1959. Parameters:
  1960.   * eax = 42 - function number
  1961.   * bl = IRQ number, 0..15
  1962.   * bh = 0 - subfunction number
  1963.   * rest of ebx must be zeroed
  1964. Returned value:
  1965.   * if the thread is not IRQ owner
  1966.     (or IRQ number is incorrect): eax = -1
  1967.   * otherwise eax = size of data in buffer
  1968. Remarks:
  1969.   * Previously the thread must reserve indicated IRQ for itself
  1970.     by function 45.
  1971.   * The size of data buffer is 4000 bytes, on overflow
  1972.     "fresh" data cease to be written in the buffer.
  1973.  
  1974. ======================================================================
  1975. ================ Function 43 - input/output to a port. ===============
  1976. ======================================================================
  1977.  
  1978. ------------------------ Output data to port -------------------------
  1979. Parameters:
  1980.   * eax = 43 - function number
  1981.   * bl = byte for output
  1982.   * ecx = port number 0xnnnn (from 0 to 0xFFFF)
  1983. Returned value:
  1984.   * eax = 0 - success
  1985.   * eax = 1 - the thread has not reserved the selected port
  1986.  
  1987. ------------------------ Input data from port ------------------------
  1988. Parameters:
  1989.   * eax = 43 - function number
  1990.   * ebx is ignored
  1991.   * ecx = 0x8000nnnn, where nnnn = port number (from 0 to 0xFFFF)
  1992. Returned value:
  1993.   * eax = 0 - success, thus ebx = entered byte
  1994.   * eax = 1 - the thread has not reserved the selected port
  1995. Remarks:
  1996.   * Previously the thread must reserve the selected port
  1997.     for itself by function 46.
  1998.   * Instead of call to this function it is better to use
  1999.     processor instructions in/out - this is much
  2000.     faster and a bit shorter and easier.
  2001.  
  2002. ======================================================================
  2003. =========== Function 44 - define operations at IRQ arrival. ==========
  2004. ======================================================================
  2005. At IRQ arrival the system can read the data from ports defined
  2006. by this function and write these data to internal buffer, whence
  2007. they can be read by ЇєэъЎшхщ 42.
  2008. Parameters:
  2009.   * eax = 44 - function number
  2010.   * ebx = pointer to the array of structures each describing one port:
  2011.     * +0: word: 0 means end of array, otherwise port number
  2012.     * +2: byte: reserved (ignored)
  2013.     * +3: byte: 1=read byte from this port, 2=read word
  2014.   * ecx = IRQ number, 0..15
  2015. Returned value:
  2016.   * eax = 0 - success
  2017.   * eax = 1 - the thread is not owner of selected IRQ
  2018. Remarks:
  2019.   * Previously the thread must reserve for itself selected IRQ
  2020.     by function 45.
  2021.   * First 16 ports are considered only.
  2022.   * The current implementation considers incorrect value of field +3
  2023.     as a signal to terminate IRQ processing.
  2024.  
  2025. ======================================================================
  2026. =================== Function 45 - reserve/free IRQ. ==================
  2027. ======================================================================
  2028. Parameters:
  2029.   * eax = 45 - function number
  2030.   * ebx = 0 - reserve, 1 = free
  2031.   * ecx = IRQ number, 0..15
  2032. Returned value:
  2033.   * eax = 0 - success
  2034.   * eax = 1 - error (invalid IRQ number
  2035.     or attempt to reserve not free IRQ
  2036.     or to free IRQ, not reserved by this thread)
  2037. Remarks:
  2038.   * IRQ reservation is required for functions 42 and 44.
  2039.   * Only one thread can reserve the specific IRQ.
  2040.   * IRQs, handled by the system itself, are reserved by the system
  2041.     (thread 1) at booting.
  2042.   * When a thread terminates, all reserved by it IRQs
  2043.     are freed automatically.
  2044.  
  2045. ======================================================================
  2046. ====== Function 46 - reserve/free a group of input/output ports. =====
  2047. ======================================================================
  2048. To work with reserved ports an application can access directly by
  2049. commands in/out (recommended way) and can use function 43
  2050. (not recommended way).
  2051. Parameters:
  2052.   * eax = 46 - function number
  2053.   * ebx = 0 - reserve, 1 - free
  2054.   * ecx = start port number
  2055.   * edx = end port number (inclusive)
  2056. Returned value:
  2057.   * eax = 0 - success
  2058.   * eax = 1 - error
  2059. Remarks:
  2060.   * For ports reservation: an error occurs if and only if
  2061.     one from the following condition satisfies:
  2062.     * start port is more than end port;
  2063.     * the selected range contains incorrect port number
  2064.       (correct are from 0 to 0xFFFF);
  2065.     * limit for the total number of reserved areas is exceeded
  2066.       (maximum 255 are allowed);
  2067.     * the selected range intersects with any of earlier reserved
  2068.   * For ports free: an error is an attempt to free range,
  2069.     that was not earlier reserved by this function
  2070.     (with same ecx,edx).
  2071.   * If an error occurs (for both cases) function performs no action.
  2072.   * At booting the system reserves for itself ports
  2073.     0..0x2d, 0x30..0x4d, 0x50..0xdf, 0xe5..0xff (inclusively).
  2074.   * When a thread terminates, all reserved by it ports
  2075.     are freed automatically.
  2076.  
  2077. ======================================================================
  2078. ============= Function 47 - draw a number in the window. =============
  2079. ======================================================================
  2080. Parameters:
  2081.   * eax = 47 - function number
  2082.   * ebx = parameters of conversion number to text:
  2083.     * bl = 0 - ecx contains number
  2084.     * bl = 1 - ecx contains pointer to dword/qword-number
  2085.     * bh = 0 - display in decimal number system
  2086.     * bh = 1 - display in hexadecimal system
  2087.     * bh = 2 - display in binary system
  2088.     * bits 16-21 = how many digits to display
  2089.     * bits 22-29 reserved and must be set to 0
  2090.     * bit 30 set = display qword (64-bit) number (must be bl=1)
  2091.     * bit 31 set = do not display leading zeroes of the number
  2092.   * ecx = number (if bl=0) or pointer (if bl=1)
  2093.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  2094.   * esi = 0xX0RRGGBB:
  2095.     * RR, GG, BB specify the color
  2096.     * X = ABnn (bits)
  2097.     * nn = font (0/1)
  2098.     * A is ignored
  2099.     * B=1 - fill background with the color edi
  2100. Returned value:
  2101.   * function does not return value
  2102. Remarks:
  2103.   * The given length must not exceed 60.
  2104.   * The exactly given amount of digits is output. If number is small
  2105.     and can be written by smaller amount of digits, it is supplemented
  2106.     by leading zeroes; if the number is big and can not be written by
  2107.     given amount of digits, extra digits are not drawn.
  2108.   * Parameters of fonts are shown in the description of function 4
  2109.     (text output).
  2110.  
  2111. ======================================================================
  2112. ========= Function 48, subfunction 0 - apply screen settings. ========
  2113. ======================================================================
  2114. Parameters:
  2115.   * eax = 48 - function number
  2116.   * ebx = 0 - subfunction number
  2117.   * ecx = 0 - reserved
  2118. Returned value:
  2119.   * function does not return value
  2120. Remarks:
  2121.   * Function redraws the screen after parameters change by
  2122.     subfunctions 1 and 2.
  2123.   * Function call without prior call to one of indicated subfunctions
  2124.     is ignored.
  2125.   * Function call with nonzero ecx is ignored.
  2126.  
  2127. ======================================================================
  2128. =========== Function 48, subfunction 1 - set button style. ===========
  2129. ======================================================================
  2130. Parameters:
  2131.   * eax = 48 - function number
  2132.   * ebx = 1 - subfunction number
  2133.   * ecx = button style:
  2134.     * 0 = flat
  2135.     * 1 = 3d
  2136. Returned value:
  2137.   * function does not return value
  2138. Remarks:
  2139.   * After call to this function one should redraw the screen by
  2140.     subfunction 0.
  2141.   * Button style influences only to their draw of function 8.
  2142.  
  2143. ======================================================================
  2144. ====== Function 48, subfunction 2 - set standard window colors. ======
  2145. ======================================================================
  2146. Parameters:
  2147.   * eax = 48 - function number
  2148.   * ebx = 2 - subfunction number
  2149.   * ecx = pointer to the color table
  2150.   * edx = size of the color table
  2151.     (must be 40 bytes for future compatibility)
  2152. Format of the color table is shown in description of subfunction 3.
  2153. Returned value:
  2154.   * function does not return value
  2155. Remarks:
  2156.   * After call to this function one should redraw the screen by
  2157.     subfunction 0.
  2158.   * Table of standard colors influences only to applications,
  2159.     which receive this table obviously (by subfunction 3)
  2160.     and use it (specifying colors from it to drawing functions).
  2161.   * Table of standard colors is included in skin and is installed
  2162.     anew with skin installation (by subfunction 8).
  2163.   * Color table can be viewed/changed interactively with
  2164.     the application 'desktop'.
  2165.  
  2166. ======================================================================
  2167. ====== Function 48, subfunction 3 - get standard window colors. ======
  2168. ======================================================================
  2169. Parameters:
  2170.   * eax = 48 - function number
  2171.   * ebx = 3 - subfunction number
  2172.   * ecx = pointer to the buffer with size edx bytes,
  2173.     where table will be written
  2174.   * edx = size of color table
  2175.     (must be 40 bytes for future compatibility)
  2176. Returned value:
  2177.   * function does not return value
  2178. Format of the color table:
  2179. each item is dword-value for color 0x00RRGGBB
  2180.   * +0: dword: frames - color of frame
  2181.   * +4: dword: grab - color of header
  2182.   * +8: dword: grab_button - color of button on header bar
  2183.   * +12 = +0xC: dword: grab_button_text - color of text on button
  2184.     on header bar
  2185.   * +16 = +0x10: dword: grab_text - color of text on header
  2186.   * +20 = +0x14: dword: work - color of working area
  2187.   * +24 = +0x18: dword: work_button - color of button in working area
  2188.   * +28 = +0x1C: dword: work_button_text - color of text on button
  2189.     in working area
  2190.   * +32 = +0x20: dword: work_text - color of text in working area
  2191.   * +36 = +0x24: dword: work_graph - color of graphics in working area
  2192. Remarks:
  2193.   * Structure of the color table is described in the standard
  2194.     include file 'macros.inc' as 'system_colors'; for example,
  2195.     it is possible to write:
  2196.         sc      system_colors           ; variable declaration
  2197.         ...                             ; somewhere one must call
  2198.                                         ; this function with ecx=sc
  2199.         mov     ecx, [sc.work_button_text]      ; read text color on
  2200.                                         ; buttin in working area
  2201.   * A program itself desides to use or not to use color table.
  2202.     For usage program must simply at calls to drawing functions select
  2203.     color taken from the table.
  2204.   * At change of the table of standard colors (by subfunction 2 with
  2205.     the subsequent application of changes by subfunction 0 or
  2206.     at skin set by subfunction 8) the system sends to all windows
  2207.     redraw message (the event with code 1).
  2208.   * Color table can be viewed/changed interactively with
  2209.     the application 'desktop'.
  2210.  
  2211. ======================================================================
  2212. ============ Function 48, subfunction 4 - get skin height. ===========
  2213. ======================================================================
  2214. Parameters:
  2215.   * eax = 48 - function number
  2216.   * ebx = 4 - subfunction number
  2217. Returned value:
  2218.   * eax = skin height
  2219. Remarks:
  2220.   * Skin height is defined as the height of a header
  2221.     of skinned windows.
  2222.   * See also general structure of window in the description
  2223.     of function 0.
  2224.  
  2225. ======================================================================
  2226. ======== Function 48, subfunction 5 - get screen working area. =======
  2227. ======================================================================
  2228. Parameters:
  2229.   * eax = 48 - function number
  2230.   * ebx = 5 - subfunction number
  2231. Returned value:
  2232.   * eax = [left]*65536 + [right]
  2233.   * ebx = [top]*65536 + [bottom]
  2234. Remarks:
  2235.   * The screen working area defines position and coordinates of
  2236.     a maximized window.
  2237.   * The screen working area in view of normal work is all screen
  2238.     without system panel (the application '@panel').
  2239.   * (left,top) are coordinates of the left upper corner,
  2240.     (right,bottom) are coordinates of the right lower one.
  2241.     Thus the size of working area on x axis can be calculated by
  2242.     formula right-left+1, on y axis - by formula bottom-right+1.
  2243.   * See also function 14,
  2244.     to get sizes of all screen.
  2245.   * There is a pair function to set working area - subfunction 6.
  2246.  
  2247. ======================================================================
  2248. ======== Function 48, subfunction 6 - set screen working area. =======
  2249. ======================================================================
  2250. Parameters:
  2251.   * eax = 48 - function number
  2252.   * ebx = 6 - subfunction number
  2253.   * ecx = [left]*65536 + [right]
  2254.   * edx = [top]*65536 + [bottom]
  2255. Returned value:
  2256.   * function does not return value
  2257. Remarks:
  2258.   * The screen working area defines position and coordinates of
  2259.     a maximized window.
  2260.   * This function is used only by the application '@panel',
  2261.     which set working area to all screen without system panel.
  2262.   * (left,top) are coordinates of the left upper corner,
  2263.     (right,bottom) are coordinates of the right lower one.
  2264.     Thus the size of working area on x axis can be calculated by
  2265.     formula right-left+1, on y axis - by formula bottom-right+1.
  2266.   * If 'left'>='right', x-coordinate of working area is not changed.
  2267.     If 'left'<0, 'left' will not be set. If 'right' is greater than or
  2268.     equal to screen width, 'right' will not be set.
  2269.     Similarly on y axis.
  2270.   * See also function 14,
  2271.     to get sizes of all screen.
  2272.   * There is a pair function to get working area - subfunction 5.
  2273.   * This function redraws the screen automatically,
  2274.     updating coordinates and sizes of maximized windows.
  2275.     The system sends to all windows redraw message (the event 1).
  2276.  
  2277. ======================================================================
  2278. =========== Function 48, subfunction 7 - get skin margins. ===========
  2279. ======================================================================
  2280. Returns the area of a header of a skinned window, intended for
  2281. a text of a header.
  2282. Parameters:
  2283.   * eax = 48 - function number
  2284.   * ebx = 7 - subfunction number
  2285. Returned value:
  2286.   * eax = [left]*65536 + [right]
  2287.   * ebx = [top]*65536 + [bottom]
  2288. Remarks:
  2289.   * An application decides itself to use or not to use this function.
  2290.   * It is recommended to take into account returned value
  2291.     of this function for choice of a place for drawing header text
  2292.     (by function 4) or a substitute of header text
  2293.     (at the discretion of an application).
  2294.  
  2295. ======================================================================
  2296. ============= Function 48, subfunction 8 - set used skin. ============
  2297. ======================================================================
  2298. Parameters:
  2299.   * eax = 48 - function number
  2300.   * ebx = 8 - subfunction number
  2301.   * ecx = pointer to a block for function 58, in
  2302.     which the fields of intermediate buffer and file name are filled
  2303. Returned value:
  2304.   * eax = 0 - success
  2305.   * otherwise eax = file system error code; if file does not
  2306.     contain valid skin, function returns error 3
  2307.     (unknown file system).
  2308. Remarks:
  2309.   * After successful skin loading the system sends to all windows
  2310.     redraw message (the event 1).
  2311.   * At booting the system reads skin from file 'default.skn'
  2312.     on ramdisk.
  2313.   * User can change the skin statically by creating hisself
  2314.     'default.skn' or dynamically with the application 'desktop'.
  2315.  
  2316. ======================================================================
  2317. =========== Function 49 - Advanced Power Management (APM). ===========
  2318. ======================================================================
  2319. Parameters:
  2320.   * eax = 49 - function number
  2321.   * dx = number of the APM function
  2322.     (analogue of ax in APM specification)
  2323.   * bx, cx = parameters of the APM function
  2324. Returned value:
  2325.   * 16-bit registers ax, bx, cx, dx, si, di and carry flag CF
  2326.     are set according to the APM specification
  2327.   * high halves of 32-bit registers eax, ebx, ecx,
  2328.     edx, esi, edi are destroyed
  2329. Remarks:
  2330.   * APM 1.2 specification is described in the document
  2331.     "Advanced Power Management (APM) BIOS Specification"
  2332.     (Revision 1.2), available at
  2333.     http://www.microsoft.com/whdc/archive/amp_12.mspx;
  2334.     besides it is included in famous Interrupt List by Ralf Brown
  2335.     (http://www.pobox.com/~ralf/files.html,
  2336.     ftp://ftp.cs.cmu.edu/afs/cs/user/ralf/pub/).
  2337.  
  2338. ======================================================================
  2339. =================== Function 50 - set window shape. ==================
  2340. ======================================================================
  2341. Normal windows have rectangular shape. This function can give to
  2342. a window any shape. The shape is given by a set of points inside
  2343. the base rectangle belonging to a window. Position and coordinates
  2344. of the base rectangle are set by function 0
  2345. and changed by function 67.
  2346.  
  2347. --------------------------- Set shape data ---------------------------
  2348. Parameters:
  2349.   * eax = 50 - function number
  2350.   * ebx = 0 - subfunction number
  2351.   * ecx = pointer to shape data (array of bytes 0/1)
  2352. Returned value:
  2353.   * function does not return value
  2354.  
  2355. -------------------------- Set shape scale ---------------------------
  2356. Parameters:
  2357.   * eax = 50 - function number
  2358.   * ebx = 1 - subfunction number
  2359.   * ecx sets a scale: each byte of data defines
  2360.     (2^scale)*(2^scale) pixels
  2361. Returned value:
  2362.   * function does not return value
  2363. Remarks:
  2364.   * Default scale is 0 (scale factor is 1). If in the shape data
  2365.     one byte corresponds to one pixel, there is no necessity
  2366.     to set scale.
  2367.   * Let's designate xsize = window width (in pixels), ysize = height;
  2368.     pay attention, that they are one pixel more than defined by
  2369.     functions 0, 67.
  2370.   * On definition of scale xsize and ysize must be divisible
  2371.     on 2^scale.
  2372.   * Byte of data on offset 'a' must be 0/1 and defines belonging
  2373.     to a window of square with the side 2^scale (if scale=0,
  2374.     this is one pixel) and coordinates of the left upper corner
  2375.     (a mod (xsize shr scale), a div (xsize shr scale))
  2376.   * Data size: (xsize shr scale)*(ysize shr scale).
  2377.   * Data must be presented in the memory and not change
  2378.     after set of shape.
  2379.   * The system views the shape data at every window redraw by
  2380.     function 0.
  2381.   * The call of subfunction 0 with NULL pointer results in return
  2382.     to the rectangular shape.
  2383.  
  2384. ======================================================================
  2385. ==================== Function 51 - create thread. ====================
  2386. ======================================================================
  2387. Parameters:
  2388.   * eax = 51 - function number
  2389.   * ebx = 1 - unique subfunction
  2390.   * ecx = address of thread entry point (starting eip)
  2391.   * edx = pointer to thread stack (starting esp)
  2392. Returned value:
  2393.   * eax = -1 - error (there is too many threads)
  2394.   * otherwise eax = TID - thread identifier
  2395.     </UL>
  2396.  
  2397. ======================================================================
  2398. === Function 52, subfunction 0 - get network driver configuration. ===
  2399. ======================================================================
  2400. Parameters:
  2401.   * eax = 52 - function number
  2402.   * ebx = 0 - subfunction number
  2403. Returned value:
  2404.   * eax = configuration dword
  2405. Remarks:
  2406.   * Configuration dword can be set by subfunction 2.
  2407.   * The kernel does not use this variable. The value of this
  2408.     variable and working with it subfunctions 0 and 2 is represented
  2409.     doubtful.
  2410.  
  2411. ======================================================================
  2412. ========= Function 52, subfunction 1 - get local IP-address. =========
  2413. ======================================================================
  2414. Parameters:
  2415.   * eax = 52 - function number
  2416.   * ebx = 1 - subfunction number
  2417. Returned value:
  2418.   * eax = IP-address (4 bytes)
  2419. Remarks:
  2420.   * Local IP-address is set by subfunction 3.
  2421.  
  2422. ======================================================================
  2423. === Function 52, subfunction 2 - set network driver configuration. ===
  2424. ======================================================================
  2425. Parameters:
  2426.   * eax = 52 - function number
  2427.   * ebx = 2 - subfunction number
  2428.   * ecx = configuration dword; if low 7 bits derivate the number 3,
  2429.     function [re-]initializes Ethernet-card, otherwise
  2430.     Ethernet turns off
  2431. Returned value:
  2432.   * if Ethernet-interface is not requested, function returns eax=2,
  2433.     but this can be changed in future kernel versions
  2434.   * if Ethernet-interface is requested, eax=0 means error
  2435.     (absence of Ethernet-card), and nonzero value - success
  2436. Remarks:
  2437.   * Configuration dword can be read by subfunction 0.
  2438.   * The kernel does not use this variable. The value of this
  2439.     variable, subfunction 0 and part of subfunction 2, which set it,
  2440.     is represented doubtful.
  2441.  
  2442. ======================================================================
  2443. ========= Function 52, subfunction 3 - set local IP-address. =========
  2444. ======================================================================
  2445. Parameters:
  2446.   * eax = 52 - function number
  2447.   * ebx = 3 - subfunction number
  2448.   * ecx = IP-address (4 bytes)
  2449. Returned value:
  2450.   * the current implementation returns eax=3, but this can be changed
  2451.     in future versions
  2452. Remarks:
  2453.   * Local IP-address can be get by subfunction 1.
  2454.  
  2455. ======================================================================
  2456. = Function 52, subfunction 6 - add data to the stack of input queue. =
  2457. ======================================================================
  2458. Parameters:
  2459.   * eax = 52 - function number
  2460.   * ebx = 6 - subfunction number
  2461.   * edx = data size
  2462.   * esi = data pointer
  2463. Returned value:
  2464.   * eax = -1 - error
  2465.   * eax = 0 - success
  2466. Remarks:
  2467.   * This function is intended only for slow network drivers
  2468.     (PPP, SLIP).
  2469.   * Data size must not exceed 1500 bytes, though function
  2470.     performs no checks on correctness.
  2471.  
  2472. ======================================================================
  2473.  Function 52, subfunction 8 - read data from the network output queue.
  2474. ======================================================================
  2475. Parameters:
  2476.   * eax = 52 - function number
  2477.   * ebx = 8 - subfunction number
  2478.   * esi = pointer to 1500-byte buffer
  2479. Returned value:
  2480.   * eax = number of read bytes (in the current implementation
  2481.     either 0 = no data or 1500)
  2482.   * data was copied in buffer
  2483. Remarks:
  2484.   * This function is intended only for slow network drivers
  2485.     (PPP, SLIP).
  2486.  
  2487. ======================================================================
  2488. ============ Function 52, subfunction 9 - get gateway IP. ============
  2489. ======================================================================
  2490. Parameters:
  2491.   * eax = 52 - function number
  2492.   * ebx = 9 - subfunction number
  2493. Returned value:
  2494.   * eax = gateway IP (4 bytes)
  2495.  
  2496. ======================================================================
  2497. =========== Function 52, subfunction 10 - get subnet mask. ===========
  2498. ======================================================================
  2499. Parameters:
  2500.   * eax = 52 - function number
  2501.   * ebx = 10 - subfunction number
  2502. Returned value:
  2503.   * eax = subnet mask
  2504.  
  2505. ======================================================================
  2506. ============ Function 52, subfunction 11 - set gateway IP. ===========
  2507. ======================================================================
  2508. Parameters:
  2509.   * eax = 52 - function number
  2510.   * ebx = 11 - subfunction number
  2511.   * ecx = gateway IP (4 bytes)
  2512. Returned value:
  2513.   * the current implementation returns eax=11, but this can be changed
  2514.     in future versions
  2515.  
  2516. ======================================================================
  2517. =========== Function 52, subfunction 12 - set subnet mask. ===========
  2518. ======================================================================
  2519. Parameters:
  2520.   * eax = 52 - function number
  2521.   * ebx = 12 - subfunction number
  2522.   * ecx = subnet mask
  2523. Returned value:
  2524.   * the current implementation returns eax=12, but this can be changed
  2525.     in future versions
  2526.  
  2527. ======================================================================
  2528. ============== Function 52, subfunction 13 - get DNS IP. =============
  2529. ======================================================================
  2530. Parameters:
  2531.   * eax = 52 - function number
  2532.   * ebx = 13 - subfunction number
  2533. Returned value:
  2534.   * eax = DNS IP (4 bytes)
  2535.  
  2536. ======================================================================
  2537. ============== Function 52, subfunction 14 - set DNS IP. =============
  2538. ======================================================================
  2539. Parameters:
  2540.   * eax = 52 - function number
  2541.   * ebx = 14 - subfunction number
  2542.   * ecx = DNS IP (4 bytes)
  2543. Returned value:
  2544.   * the current implementation returns eax=14, but this can be changed
  2545.     in future versions
  2546.  
  2547. ======================================================================
  2548. ======== Function 52, subfunction 15 - get local MAC address. ========
  2549. ======================================================================
  2550. Parameters:
  2551.   * eax = 52 - function number
  2552.   * ebx = 15 - subfunction number
  2553.   * ecx = 0 - read first 4 bytes,
  2554.     ecx = 4 - read last 2 bytes
  2555. Returned value:
  2556.   * for ecx=0: eax = first 4 bytes of MAC address
  2557.   * for ecx=4: ax = last 2 bytes of MAC address,
  2558.                high half of eax is destroyed
  2559.   * for other ecx: eax = -1 indicates an error
  2560.  
  2561. ======================================================================
  2562. ============ Function 53, subfunction 0 - open UDP-socket. ===========
  2563. ======================================================================
  2564. Parameters:
  2565.   * eax = 53 - function number
  2566.   * ebx = 0 - subfunction number
  2567.   * ecx = local port (only low word is taken into account)
  2568.   * edx = remote port (only low word is taken into account)
  2569.   * esi = remote IP
  2570. Returned value:
  2571.   * eax = -1 = 0xFFFFFFFF - error; ebx destroyed
  2572.   * eax = socket handle (some number which unambiguously identifies
  2573.     socket and have sense only for the system) - success;
  2574.     ebx destroyed
  2575.  
  2576. ======================================================================
  2577. =========== Function 53, subfunction 1 - close UDP-socket. ===========
  2578. ======================================================================
  2579. Parameters:
  2580.   * eax = 53 - function number
  2581.   * ebx = 1 - subfunction number
  2582.   * ecx = socket handle
  2583. Returned value:
  2584.   * eax = -1 - incorrect handle
  2585.   * eax = 0 - success
  2586.   * ebx destroyed
  2587. Remarks:
  2588.   * The current implementation does not close automatically all
  2589.     sockets of a thread at termination. In particular, one should not
  2590.     kill a thread with many opened sockets - there will be an outflow
  2591.     of resources.
  2592.  
  2593. ======================================================================
  2594. ============== Function 53, subfunction 2 - poll socket. =============
  2595. ======================================================================
  2596. Parameters:
  2597.   * eax = 53 - function number
  2598.   * ebx = 2 - subfunction number
  2599.   * ecx = socket handle
  2600. Returned value:
  2601.   * eax = number of read bytes, 0 for incorrect handle
  2602.   * ebx destroyed
  2603.  
  2604. ======================================================================
  2605. ========= Function 53, subfunction 3 - read byte from socket. ========
  2606. ======================================================================
  2607. Parameters:
  2608.   * eax = 53 - function number
  2609.   * ebx = 3 - subfunction number
  2610.   * ecx = socket handle
  2611. Returned value:
  2612.   * if there is no read data or handle is incorrect: eax=0, bl=0,
  2613.     other bytes of ebx are destroyed
  2614.   * if there are read data: eax=number of rest bytes
  2615.     (possibly 0), bl=read byte, other bytes of ebx are destroyed
  2616.  
  2617. ======================================================================
  2618. ========== Function 53, subfunction 4 - write to UDP-socket. =========
  2619. ======================================================================
  2620. Parameters:
  2621.   * eax = 53 - function number
  2622.   * ebx = 4 - subfunction number
  2623.   * ecx = socket handle
  2624.   * edx = number of bytes to write
  2625.   * esi = pointer to data to write
  2626. Returned value:
  2627.   * eax = 0xffffffff - error (invalid handle or not enough memory)
  2628.   * eax = 0 - success
  2629.   * ebx destroyed
  2630. Remarks:
  2631.   * Number of bytes to write must not exceed 1500-28, though
  2632.     the appropriate check is not made.
  2633.  
  2634. ======================================================================
  2635. ============ Function 53, subfunction 5 - open TCP-socket. ===========
  2636. ======================================================================
  2637. Parameters:
  2638.   * eax = 53 - function number
  2639.   * ebx = 5 - subfunction number
  2640.   * ecx = local port (only low word is taken into account)
  2641.   * edx = remote port (only low word is taken into account)
  2642.   * esi = remote IP
  2643.   * edi = open mode: SOCKET_PASSIVE=0 or SOCKET_ACTIVE=1
  2644. Returned value:
  2645.   * eax = -1 = 0xFFFFFFFF - error; ebx destroys
  2646.   * eax = socket handle (some number which unambiguously identifies
  2647.     socket and have sense only for the system) - success;
  2648.     ebx destroyed
  2649.  
  2650. ======================================================================
  2651. ========= Function 53, subfunction 6 - get TCP-socket status. ========
  2652. ======================================================================
  2653. Parameters:
  2654.   * eax = 53 - function number
  2655.   * ebx = 6 - subfunction number
  2656.   * ecx = socket handle
  2657. Returned value:
  2658.   * eax = 0 for incorrect handle or socket status: one of
  2659.   * TCB_LISTEN = 1
  2660.   * TCB_SYN_SENT = 2
  2661.   * TCB_SYN_RECEIVED = 3
  2662.   * TCB_ESTABLISHED = 4
  2663.   * TCB_FIN_WAIT_1 = 5
  2664.   * TCB_FIN_WAIT_2 = 6
  2665.   * TCB_CLOSE_WAIT = 7
  2666.   * TCB_CLOSING = 8
  2667.   * TCB_LAST_ASK = 9
  2668.   * TCB_TIME_WAIT = 10
  2669.   * TCB_CLOSED = 11
  2670.   * ebx destroyed
  2671.  
  2672. ======================================================================
  2673. ========== Function 53, subfunction 7 - write to TCP-socket. =========
  2674. ======================================================================
  2675. Parameters:
  2676.   * eax = 53 - function number
  2677.   * ebx = 7 - subfunction number
  2678.   * ecx = socket handle
  2679.   * edx = number of bytes to write
  2680.   * esi = pointer to data to write
  2681. Returned value:
  2682.   * eax = 0xffffffff - error (invalid handle or not enough memory)
  2683.   * eax = 0 - success
  2684.   * ebx destroyed
  2685. Remarks:
  2686.   * Number of bytes to write must not exceed 1500-40, though
  2687.     the appropriate check is not made.
  2688.  
  2689. ======================================================================
  2690. =========== Function 53, subfunction 8 - close TCP-socket. ===========
  2691. ======================================================================
  2692. Parameters:
  2693.   * eax = 53 - function number
  2694.   * ebx = 8 - subfunction number
  2695.   * ecx = socket handle
  2696. Returned value:
  2697.   * eax = -1 - error (invalid handle or
  2698.     not enough memory for socket close packet)
  2699.   * eax = 0 - success
  2700.   * ebx destroyed
  2701. Remarks:
  2702.   * The current implementation does not close automatically all
  2703.     sockets of a thread at termination. In particular, one should not
  2704.     kill a thread with many opened sockets - there will be an outflow
  2705.     of resources.
  2706.  
  2707. ======================================================================
  2708. === Function 53, subfunction 9 - check whether local port is free. ===
  2709. ======================================================================
  2710. Parameters:
  2711.   * eax = 53 - function number
  2712.   * ebx = 9 - subfunction number
  2713.   * ecx = local port number (low 16 bits are used only)
  2714. Returned value:
  2715.   * eax = 0 - port is used
  2716.   * eax = 1 - port is free
  2717.   * ebx destroyed
  2718.  
  2719. ======================================================================
  2720. ===== Function 53, subfunction 10 - query Ethernet cable status. =====
  2721. ======================================================================
  2722. Parameters:
  2723.   * eax = 53 - function number
  2724.   * ebx = 10 - subfunction number
  2725. Returned value:
  2726.   * al = -1 - a network driver is not loaded or
  2727.               does not support this function
  2728.   * al = 0 - Ethernet cable is unplugged
  2729.   * al = 1 - Ethernet cable is plugged
  2730.   * ebx destroyed
  2731. Remarks:
  2732.   * The current kernel implementation supports this function
  2733.     only for RTL8139 network cards.
  2734.  
  2735. ======================================================================
  2736. ======= Function 53, subfunction 11 - read network stack data. =======
  2737. ======================================================================
  2738. Paramters:
  2739.   * eax = 53 - function number
  2740.   * ebx = 11 - subfunction number
  2741.   * ecx = socket handle
  2742.   * edx = pointer to buffer
  2743.   * esi = number of bytes to read;
  2744.   * esi = 0 - read all data (maximum 4096 bytes)
  2745. Returned value:
  2746.   * eax = number of bytes read (0 for incorrect handle)
  2747.   * ebx destroyed
  2748.  
  2749. ======================================================================
  2750. = Function 53, subfunction 255 - debug information of network driver.
  2751. ======================================================================
  2752. Parameters:
  2753.   * eax = 53 - function number
  2754.   * ebx = 255 - subfunction number
  2755.   * ecx = type of requested information (see below)
  2756. Returned value:
  2757.   * eax = requested information
  2758.   * ebx destroyed
  2759. Possible values for ecx:
  2760.   * 100: length of queue 0 (empty queue)
  2761.   * 101: length of queue 1 (ip-out queue)
  2762.   * 102: length of queue 2 (ip-in queue)
  2763.   * 103: length of queue 3 (net1out queue)
  2764.   * 200: number of items in the ARP table
  2765.   * 201: size of the ARP table (in items) (20 for current version)
  2766.   * 202: read item at edx of the ARP table to the temporary buffer,
  2767.     whence 5 following types take information;
  2768.     in this case eax is not defined
  2769.   * 203: IP-address saved by type 202
  2770.   * 204: high dword of MAC-address saved by type 202
  2771.   * 205: low word of MAC-address saved by type 202
  2772.   * 206: status word saved by type 202
  2773.   * 207: ttl word saved by type 202
  2774.   * 2: total number of received IP-packets
  2775.   * 3: total number of transferred IP-packets
  2776.   * 4: total number of dumped received packets
  2777.   * 5: total number of received ARP-packets
  2778.   * 6: status of packet driver, 0=inactive, nonzero=active
  2779.  
  2780. ======================================================================
  2781.  Function 55, subfunction 55 - begin to play data on built-in speaker.
  2782. ======================================================================
  2783. Parameters:
  2784.   * eax = 55 - function number
  2785.   * ebx = 55 - subfunction number
  2786.   * esi = pointer to data
  2787. Returned value:
  2788.   * eax = 0 - success
  2789.   * eax = 55 - error (speaker is off or busy)
  2790. Data is an array of items with variable length.
  2791. Format of each item is defined by first byte:
  2792.   * 0 = end of data
  2793.   * 1..0x80 = sets sound duration on 1/100 of second; sound note
  2794.     is defined by immediate value of frequency
  2795.     * following word (2 bytes) contains frequency divider;
  2796.       frequency is defined as 1193180/divider
  2797.   * 0x81 = invalid
  2798.   * 0x82..0xFF = note is defined by octave and number:
  2799.     * duration in 1/100 of second = (first byte)-0x81
  2800.     * there is one more byte;
  2801.     * (second byte)=0xFF - delay
  2802.     * otherwise it looks like a*0x10+b, where b=number of the note in
  2803.       an octave from 1 to 12, a=number of octave (beginning from 0)
  2804. Remarks:
  2805.   * Speaker play can be disabled/enabled by
  2806.     subfunction 8 of function 18.
  2807.   * Function returns control, having informed the system
  2808.     an information on request. Play itself goes independently from
  2809.     the program.
  2810.   * The data must be kept in the memory at least up to the end
  2811.     of play.
  2812.  
  2813. ======================================================================
  2814. ======================= Function 57 - PCI BIOS. ======================
  2815. ======================================================================
  2816. Parameters:
  2817.   * eax = 57 - function number
  2818.   * ebp corresponds to al in PCI BIOS specification
  2819.   * other registers are set according to PCI BIOS specification
  2820. Returned value:
  2821.   * CF is undefined
  2822.   * other registers are set according to PCI BIOS specification
  2823. Remarks:
  2824.   * Many effects of this function can be also achieved with
  2825.     corresponding subfunctions of function 62.
  2826.   * The function calls PCI32 BIOS extension, documented e.g. in
  2827.     http://alpha1.dyns.net/files/PCI/bios21.pdf.
  2828.   * If BIOS does not support this extension, its behavior is emulated
  2829.     (through kernel-mode analogues of subfunctions of function 62).
  2830.  
  2831. ======================================================================
  2832. ================ Function 58 - work with file system. ================
  2833. ======================================================================
  2834. Parameters:
  2835.   * eax = 58
  2836.   * ebx = pointer to the information structure
  2837. Returned value:
  2838.   * eax = 0 - success; otherwise file system error code
  2839.   * some subfunctions return value in other registers too
  2840. General format of the information structure:
  2841.   * +0: dword: subfunction number
  2842.   * +4: dword: number of block
  2843.   * +8: dword: size
  2844.   * +12 = +0xC: dword: pointer to data
  2845.   * +16 = +0x10: dword: pointer to a memory for system operations
  2846.     (4096 bytes)
  2847.   * +20 = +0x14: n db: ASCIIZ-string with the file name
  2848. Specifications - in documentation on the appropriate subfunction.
  2849. Filename is case-insensitive for latin letters, russian letters
  2850. must be capital.
  2851. Format of filename:
  2852. /base/number/dir1/dir2/.../dirn/file,
  2853. where /base/number identifies device, on which file is located:
  2854. one of
  2855.   * /RD/1 = /RAMDISK/1 to access ramdisk
  2856.   * /FD/1 = /FLOPPYDISK/1 to access first floppy drive,
  2857.     /FD/2 = /FLOPPYDISK/2 to access second one
  2858.   * /HD/x = /HARDDISK/x - obsolete variant of access to hard disk
  2859.     (in this case base is defined by subfunction 7 of function 21),
  2860.     x - partition number (beginning from 1)
  2861.   * /HD0/x, /HD1/x, /HD2/x, /HD3/x to access accordingly to devices
  2862.     IDE0 (Primary Master), IDE1 (Primary Slave),
  2863.     IDE2 (Secondary Master), IDE3 (Secondary Slave);
  2864.     x - partition number on the selected hard drive, varies from 1
  2865.     to 255 (on each hard drive the indexing starts from 1)
  2866. Remarks:
  2867.   * In the first two cases it is also possible to use FIRST
  2868.     instead of 1, SECOND instead of 2, but it is not recommended
  2869.     for convenience of transition to the future extensions.
  2870.   * Limitation n<=39 is imposed.
  2871.   * Names of folders and file dir1,...,dirn,file must have the
  2872.     format 8.3: name no more than 8 characters, dot, extension no
  2873.     more than 3 characters. Trailing spaces are ignored, no other
  2874.     spaces is allowed. If name occupies equally 8 characters,
  2875.     dot may be omitted (though it is not recommended to use this
  2876.     feature for convenience of transition to the future extensions).
  2877.   * This function does not support folders on ramdisk.
  2878. Examples:
  2879.   * '/RAMDISK/FIRST/KERNEL.ASM',0
  2880.     '/rd/1/kernel.asm',0
  2881.   * '/HD0/1/kernel.asm',0
  2882.   * '/hd0/1/menuet/pics/tanzania.bmp',0
  2883. Existing subfunctions:
  2884.   * subfunction 0 - read file/folder
  2885.   * subfunction 8 - LBA-read from device
  2886.   * subfunction 15 - get file system information
  2887.  
  2888. ======================================================================
  2889. =========== Function 58, subfunction 0 - read file/folder. ===========
  2890. ======================================================================
  2891. Parameters:
  2892.   * eax = 58
  2893.   * ebx = pointer to the information structure
  2894. Format of the information structure:
  2895.   * +0: dword: 0 = subfunction number
  2896.   * +4: dword: first block to read (beginning from 0)
  2897.   * +8: dword: amount of blocks to read
  2898.   * +12 = +0xC: dword: pointer to buffer for data
  2899.   * +16 = +0x10: dword: pointer to buffer for system operations
  2900.     (4096 bytes)
  2901.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  2902.     given in the general description
  2903. Returned value:
  2904.   * eax = 0 - success, otherwise file system error code
  2905.   * ebx = file size (in bytes) or -1=0xffffffff, if file was not found
  2906. Remarks:
  2907.   * Block size is 512 bytes.
  2908.   * This function is obsolete, for reading files use subfunction 0
  2909.     of function 70, for reading folders - subfunction 1 of
  2910.     function 70.
  2911.   * Function can read contents of a folder. Only FAT file system is
  2912.     supported. The format of FAT-folder is described
  2913.     in any FAT documentation.
  2914.   * Size of a folder is determined by size of FAT clusters chain.
  2915.   * If file was ended before last requested block was read,
  2916.     the function will read as many as it can, and after that return
  2917.     eax=6 (EOF).
  2918.   * Function can read root folders /rd/1,/fd/x,/hd[n]/x, but
  2919.     in the first two cases the current implementation does not follow
  2920.     to the declared rules:
  2921.     for /rd/1:
  2922.     * if one want to read 0 blocks, function considers,
  2923.       that he requested 1;
  2924.     * if one requests more than 14 blocks or starting block is
  2925.       not less than 14, function returns eax=5 (not found) ш ebx=-1;
  2926.     * size of ramdisk root folder is 14 blocks,
  2927.       0x1C00=7168 срщЄ; but function returns ebx=0
  2928.       (except of the case of previous item);
  2929.     * strangely enough, it is possible to read 14th block (which
  2930.       generally contains a garbage - I remind, the indexing begins
  2931.       from 0);
  2932.     * if some block with the number not less than 14 was requested,
  2933.       function returns eax=6(EOF); otherwise eax=0.
  2934.     For /fd/x:
  2935.     * if the start block is not less than 14, function returns
  2936.       eax=5 (not found) and ebx=0;
  2937.     * note that format of FAT12 allows floppies with the root size
  2938.       more or less than 14 blocks;
  2939.     * check for length is not performed;
  2940.     * if data was successful read, function returns
  2941.       eax=0,ebx=0; otherwise eax=10 (access denied), ebx=-1.
  2942.   * The function handles reading of special folders /,/rd,/fd,/hd[n];
  2943.     but the result does not correspond to expected (on operations with
  2944.     normal files/folders), does not follow the declared rules,
  2945.     may be changed in future versions of the kernel and consequently
  2946.     is not described. To obtain the information about the equipment
  2947.     use subfunction 11 of function 18 or
  2948.     read corresponding folder with subfunction 1 of function 70.
  2949.  
  2950. ======================================================================
  2951. ========= Function 58, subfunction 8 - LBA-read from device. =========
  2952. ======================================================================
  2953. Parameters:
  2954.   * eax = 58 - function number
  2955.   * ebx = pointer to the information structure
  2956. Format of the information structure:
  2957.   * +0: dword: 8 = subfunction number
  2958.   * +4: dword: number of block to read (beginning from 0)
  2959.   * +8: dword: ignored (set to 1)
  2960.   * +12 = +0xC: dword: pointer to buffer for data (512 bytes)
  2961.   * +16 = +0x10: dword: pointer to buffer for system operations
  2962.     (4096 bytes)
  2963.   * +20 = +0x14: ASCIIZ-name of device: case-insensitive, one of
  2964.     /rd/1 = /RamDisk/1, /hd/n = /HardDisk/n,
  2965.     1<=n<=4 - number of device: 1=IDE0, ..., 4=IDE3.
  2966.     Instead of digits it is allowed, though not recommended for
  2967.     convenience of transition to future extensions, to use
  2968.     'first','second','third','fourth'.
  2969. Returned value:
  2970.   * for device name /hd/xxx, where xxx is not in the list above:
  2971.     * eax = ebx = 1
  2972.   * for invalid device name (except for the previous case):
  2973.     * eax = 5
  2974.     * ebx does not change
  2975.   * if LBA-access is disabled by subfunction 11 of function 21:
  2976.     * eax = 2
  2977.     * ebx destroyed
  2978.   * for ramdisk: attempt to read block outside ramdisk
  2979.     (18*2*80 blocks) results in
  2980.     * eax = 3
  2981.     * ebx = 0
  2982.   * for successful read:
  2983.     * eax = ebx = 0
  2984. Remarks:
  2985.   * Block size is 512 bytes; function reads one block.
  2986.   * Do not depend on returned value, it can be changed
  2987.     in future versions.
  2988.   * Function requires that LBA-access to devices is enabled by
  2989.     subfunction 11 of function 21. To check this one can use
  2990.     subfunction 11 of function 26.
  2991.   * LBA-read of floppy is not supported.
  2992.   * Function reads data on physical hard drive; if for any reason
  2993.     data of the concrete partition are required, application must
  2994.     define starting sector of this partition (either directly
  2995.     through MBR, or from the full structure returned by
  2996.     яюфЇєэъЎшхщ 11 ЇєэъЎшш 18).
  2997.   * Function does not check error code of hard disk, so request of
  2998.     nonexisting sector reads something (most probably it will be
  2999.     zeroes, but this is defined by device) and this is considered
  3000.     as success (eax=0).
  3001.  
  3002. ======================================================================
  3003. ==== Function 58, subfunction 15 - get information on file system. ===
  3004. ======================================================================
  3005. Parameters:
  3006.   * eax = 58 - function number
  3007.   * ebx = pointer to the information structure
  3008. Format of the information structure:
  3009.   * +0: dword: 15 = subfunction number
  3010.   * +4: dword: ignored
  3011.   * +8: dword: ignored
  3012.   * +12 = +0xC: dword: ignored
  3013.   * +16 = +0x10: dword: ignored
  3014.   * +20 = +0x14: (only second character is checked)
  3015.     /rd=/RAMDISK or /hd=/HARDDISK
  3016. Returned value:
  3017.   * if the second character does not belong to set {'r','R','h','H'}:
  3018.     * eax = 3
  3019.     * ebx = ecx = dword [fileinfo] = 0
  3020.   * for ramdisk:
  3021.     * eax = 0 (success)
  3022.     * ebx = total number of clusters = 2847
  3023.     * ecx = number of free clusters
  3024.     * dword [fileinfo] = cluster size = 512
  3025.   * for hard disk: base and partition are defined by subfunctions
  3026.     7 and 8 of function 21:
  3027.     * eax = 0 (success)
  3028.     * ebx = total number of clusters
  3029.     * ecx = number of free clusters
  3030.     * dword [fileinfo] = cluster size (in bytes)
  3031. Remarks:
  3032.   * Be not surprised to strange layout of 4th returned parameter
  3033.     - when this code was writing, at system calls application got
  3034.     only registers eax,ebx,ecx (from pushad-structure transmitted
  3035.     as argument to the system function). Now it is corrected, so,
  3036.     probably, it is meaningful to return cluster size in edx, while
  3037.     this function is not used yet.
  3038.   * There exists also subfunction 11 of function 18,
  3039.     which returns information on file system. From the full table
  3040.     of disk subsystem it is possible to deduce cluster size (there
  3041.     it is stored in sectors) and total number of clusters
  3042.     for hard disks.
  3043.  
  3044. ======================================================================
  3045. ========== Function 60 - Inter Process Communication (IPC). ==========
  3046. ======================================================================
  3047. IPC is used for message dispatching from one process/thread to
  3048. another. Previously it is necessary to agree how to interpret
  3049. the concrete message.
  3050.  
  3051. ----------- Subfunction 1 - set the area for IPC receiving -----------
  3052. Is called by process-receiver.
  3053. Parameters:
  3054.   * eax = 60 - function number
  3055.   * ebx = 1 - subfunction number
  3056.   * ecx = pointer to the buffer
  3057.   * edx = size of the buffer
  3058. Returned value:
  3059.   * eax = 0 - always success
  3060. Format of IPC-buffer:
  3061.   * +0: dword: if nonzero, buffer is considered locked;
  3062.     lock/unlock the buffer, when you work with it and need that
  3063.     buffer data are not changed from outside (no new messages)
  3064.   * +4: dword: occupied place in the buffer (in bytes)
  3065.   * +8: first message
  3066.   * +8+n: second message
  3067.   * ...
  3068. Format of a message:
  3069.   * +0: dword: PID of sender
  3070.   * +4: dword: message length (not including this header)
  3071.   * +8: n*byte: message data
  3072.  
  3073. ------------------ Subfunction 2 - send IPC message ------------------
  3074. Is called by process-sender.
  3075. Parameters:
  3076.   * eax = 60 - function number
  3077.   * ebx = 2 - subfunction number
  3078.   * ecx = PID of receiver
  3079.   * edx = pointer to the message data
  3080.   * esi = message length (in bytes)
  3081. Returned value:
  3082.   * eax = 0 - success
  3083.   * eax = 1 - the receiver has not defined buffer for IPC messages
  3084.     (can be, still have no time,
  3085.     and can be, this is not right process)
  3086.   * eax = 2 - the receiver has blocked IPC-buffer; try to wait a bit
  3087.   * eax = 3 - overflow of IPC-buffer of the receiver
  3088.   * eax = 4 - process/thread with such PID does not exist
  3089. Remarks:
  3090.   * Immediately after writing of IPC-message to the buffer the system
  3091.     sends to the receiver the event with code 7 (see event codes).
  3092.  
  3093. ======================================================================
  3094. ==== Function 61 - get parameters for the direct graphics access. ====
  3095. ======================================================================
  3096. The data of the graphics screen (the memory area which displays
  3097. screen contents) are accessible to a program directly, without
  3098. any system calls, through the selector gs:
  3099.         mov     eax, [gs:0]
  3100. places in eax the first dword of the buffer, which contains
  3101. information on color of the left upper point (and, possibly, colors
  3102. of several following).
  3103.         mov     [gs:0], eax
  3104. by work in VESA modes with LFB sets color of the left upper point
  3105. (and, possibly, colors of several following).
  3106. To interpret the data of graphics screen program needs to know
  3107. some parameters, returning by this function.
  3108. Remarks:
  3109.   * Graphics parameters changes very seldom at work,
  3110.     namely, only in cases, when user works with the application VRR.
  3111.   * At videomode change the system redraws all windows (event
  3112.     with code 1) and redraws the background (event 5).
  3113.     Same events occur in other cases too, which meet much more often,
  3114.     than videomode change.
  3115.   * By operation in videomodes with LFB the selector gs points to
  3116.     LFB itself, so reading/writing on gs result directly in
  3117.     change of screen contents. By operation in videomodes without
  3118.     LFB gs points to some data area in the kernel, and all functions
  3119.     of screen output fulfil honesty double operation on writing
  3120.     directly to the screen and writing to this buffer. In result
  3121.     at reading contents of this buffer the results correspond to
  3122.     screen contents (with, generally speaking, large color
  3123.     resolution), and writing is ignored.
  3124.     One exception is the mode 320*200, for which main loop of the
  3125.     system thread updates the screen according to mouse movements.
  3126.  
  3127. ------------------------- Screen resolution --------------------------
  3128. Parameters:
  3129.   * eax = 61 - function number
  3130.   * ebx = 1 - subfunction number
  3131. Returned value:
  3132.   * eax = [resolution on x axis]*65536 + [resolution on y axis]
  3133. Remarks:
  3134.   * One can use function 14 paying attention that
  3135.     it returns sizes on 1 pixel less. It is fully equivalent way.
  3136.  
  3137. ---------------------- Number of bits per pixel ----------------------
  3138. Parameters:
  3139.   * eax = 61 - function number
  3140.   * ebx = 2 - subfunction number
  3141. Returned value:
  3142.   * eax = number of bits per pixel (24 or 32)
  3143.  
  3144. -------------------- Number of bytes per scanline --------------------
  3145. Parameters:
  3146.   * eax = 61 - function number
  3147.   * ebx = 3 - subfunction number
  3148. Returned value:
  3149.   * eax = number of bytes occupied by one scanline
  3150.     (horizontal line on the screen)
  3151.  
  3152. ======================================================================
  3153. ===== Function 62, subfunction 0 - get version of PCI-interface. =====
  3154. ======================================================================
  3155. Parameters:
  3156.   * eax = 62 - function number
  3157.   * bl = 0 - subfunction number
  3158. Returned value:
  3159.   * eax = -1 - PCI access is disabled; otherwise
  3160.   * ah.al = version of PCI-interface (ah=version, al=subversion)
  3161.   * high word of eax is zeroed
  3162. Remarks:
  3163.   * Previously low-level access to PCI for applications must be
  3164.     enabled by subfunction 12 of function 21.
  3165.   * If PCI BIOS is not supported, the value of ax is undefined.
  3166.  
  3167. ======================================================================
  3168. ==== Function 62, subfunction 1 - get number of the last PCI-bus. ====
  3169. ======================================================================
  3170. Parameters:
  3171.   * eax = 62 - function number
  3172.   * bl = 1 - subfunction number
  3173. Returned value:
  3174.   * eax = -1 - access to PCI is disabled; otherwise
  3175.   * al = number of the last PCI-bus; other bytes of eax are destroyed
  3176. Remarks:
  3177.   * Previously low-level access to PCI for applications must be
  3178.     enabled by subfunction 12 of function 21.
  3179.   * If PCI BIOS is not supported, the value of ax is undefined.
  3180.  
  3181. ======================================================================
  3182. ===================== Function 62, subfunction 2 =====================
  3183. ===== Get mechanism of addressing to the PCI configuration space. ====
  3184. ======================================================================
  3185. Parameters:
  3186.   * eax = 62 - function number
  3187.   * bl = 2 - subfunction number
  3188. Returned value:
  3189.   * eax = -1 - access to PCI is disabled; otherwise
  3190.   * al = mechanism (1 or 2); other bytes of eax are destroyed
  3191. Remarks:
  3192.   * Previously low-level access to PCI for applications must be
  3193.     enabled by subfunction 12 of function 21.
  3194.   * Addressing mechanism is selected depending on
  3195.     equipment characteristics.
  3196.   * Subfunctions of read and write work automatically
  3197.     with the selected mechanism.
  3198.  
  3199. ======================================================================
  3200. ======== Function 62, subfunctions 4,5,6 - read PCI-register. ========
  3201. ======================================================================
  3202. Parameters:
  3203.   * eax = 62 - function number
  3204.   * bl = 4 - read byte
  3205.   * bl = 5 - read word
  3206.   * bl = 6 - read dword
  3207.   * bh = number of PCI-bus
  3208.   * ch = dddddfff, where ddddd = number of the device on the bus,
  3209.     fff = function number of device
  3210.   * cl = number of register (must be even for bl=5,
  3211.     divisible by 4 for bl=6)
  3212. Returned value:
  3213.   * eax = -1 - error (access to PCI is disabled or parameters
  3214.     are not supported); otherwise
  3215.   * al/ax/eax (depending on requested size) contains the data;
  3216.     the other part of register eax is destroyed
  3217. Remarks:
  3218.   * Previously low-level access to PCI for applications must be
  3219.     enabled by subfunction 12 of function 21.
  3220.   * Access mechanism 2 supports only 16 devices on a bus and ignores
  3221.     function number. To get access mechanism use subfunction 2.
  3222.   * Some registers are standard and exist for all devices, some are
  3223.     defined by the concrete device. The list of registers of the
  3224.     first type can be found e.g. in famous
  3225.     Interrupt List by Ralf Brown
  3226.     (http://www.pobox.com/~ralf/files.html,
  3227.     ftp://ftp.cs.cmu.edu/afs/cs/user/ralf/pub/);
  3228.     registers of the second type must be listed
  3229.     in the device documentation.
  3230.  
  3231. ======================================================================
  3232. ====== Function 62, subfunctions 8,9,10 - write to PCI-register. =====
  3233. ======================================================================
  3234. Parameters:
  3235.   * eax = 62 - function number
  3236.   * bl = 8 - write byte
  3237.   * bl = 9 - write word
  3238.   * bl = 10 - write dword
  3239.   * bh = number of PCI-bus
  3240.   * ch = dddddfff, where ddddd = number of the device on the bus,
  3241.     fff = function number of device
  3242.   * cl = number of register (must be even for bl=9,
  3243.     divisible by 4 for bl=10)
  3244.   * dl/dx/edx (depending on requested size) contatins
  3245.     the data to write
  3246. Returned value:
  3247.   * eax = -1 - error (access to PCI is disabled or parameters
  3248.     are not supported)
  3249.   * eax = 0 - success
  3250. Remarks:
  3251.   * Previously low-level access to PCI for applications must be
  3252.     enabled by subfunction 12 of function 21.
  3253.   * Access mechanism 2 supports only 16 devices on a bus and ignores
  3254.     function number. To get access mechanism use subfunction 2.
  3255.   * Some registers are standard and exist for all devices, some are
  3256.     defined by the concrete device. The list of registers of the
  3257.     first type can be found e.g. in famous Interrupt List by
  3258.     Ralf Brown; registers of the second type must be listed
  3259.     in the device documentation.
  3260.  
  3261. ======================================================================
  3262. ============== Function 63 - work with the debug board. ==============
  3263. ======================================================================
  3264. The debug board is the global system buffer (with the size
  3265. 1024 bytes), to which any program can write (generally speaking,
  3266. arbitrary) data and from which other program can read these data.
  3267. By the agreement written data are text strings interpreted as
  3268. debug messages on a course of program execution. The kernel in
  3269. some situations also writes to the debug board information on
  3270. execution of some functions; by the agreement kernel messages
  3271. begins from the prefix "K : ".
  3272. For view of the debug board the application 'board' was created,
  3273. which reads data from the buffer and displays them in its window.
  3274. 'board' interpretes the sequence of codes 13,10 as newline.
  3275. A character with null code in an end of line is not necessary,
  3276. but also does not prevent.
  3277. Because debugger has been written, the value of the debug board
  3278. has decreased, as debugger allows to inspect completely a course of
  3279. program execution without any efforts from the direction of program
  3280. itself. Nevertheless in some cases the debug board is still useful.
  3281.  
  3282. ----------------------------- Write byte -----------------------------
  3283. Parameters:
  3284.   * eax = 63 - function number
  3285.   * ebx = 1 - subfunction number
  3286.   * cl = data byte
  3287. Returned value:
  3288.   * function does not return value
  3289. Remarks:
  3290.   * Byte is written to the buffer. Buffer size is 512 bytes.
  3291.     At buffer overflow all obtained data are lost.
  3292.   * For output to the debug board of more complicated objects
  3293.     (strings, numbers) it is enough to call this function in cycle.
  3294.     It is possible not to write the appropriate code manually and use
  3295.     file 'debug.inc', which is included into the distributive.
  3296.  
  3297. ----------------------------- Read byte ------------------------------
  3298. Takes away byte from the buffer.
  3299. Parameters:
  3300.   * eax = 63 - function number
  3301.   * ebx = 2 - subfunction number
  3302. Returned value:
  3303.   * eax = ebx = 0 - the buffer is empty
  3304.   * eax = byte, ebx = 1 - byte was successfully read
  3305.  
  3306. ======================================================================
  3307. ============== Function 64 - resize application memory. ==============
  3308. ======================================================================
  3309. Parameters:
  3310.   * eax = 64 - function number
  3311.   * ebx = 1 - unique subfunction
  3312.   * ecx = new memory size
  3313. Returned value:
  3314.   * eax = 0 - success
  3315.   * eax = 1 - not enough memory
  3316. Remarks:
  3317.   * There is another way to dynamically allocate/free memory -
  3318.     subfunctions 11, 12, 13 of function 68.
  3319.   * The function cannot be used together with 68.11, 68.12, 68.13.
  3320.     The function call will be ignored after creation of process heap
  3321.     with function 68.11.
  3322.  
  3323. ======================================================================
  3324. ======== Function 65 - draw image with palette in the window. ========
  3325. ======================================================================
  3326. Parameters:
  3327.   * eax = 65 - function number
  3328.   * ebx = pointer to the image
  3329.   * ecx = [size on axis x]*65536 + [size on axis y]
  3330.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  3331.   * esi = number of bits per pixel, must be 1,2,4,8,15,16,24 or 32
  3332.   * edi = pointer to palette (2 to the power esi colors 0x00RRGGBB);
  3333.           ignored when esi > 8
  3334.   * ebp = offset of next row data relative to previous row data
  3335. Returned value:
  3336.   * function does not return value
  3337. Remarks:
  3338.   * Coordinates of the image are coordinates of the upper left corner
  3339.     of the image relative to the window.
  3340.   * Format of image with 1 bit per pixel: each byte of image
  3341.     (possibly excluding last bytes in rows), contains information on
  3342.     the color of 8 pixels, MSB corresponds to first pixel.
  3343.   * Format of image with 2 bits per pixel: each byte of image
  3344.     (possibly excluding last bytes in rows), contains information on
  3345.     the color of 4 pixels, two MSBs correspond to first pixel.
  3346.   * Format of image with 4 bits per pixel: each byte of image
  3347.     excluding last bytes in rows (if width is odd) contains
  3348.     information on the color of 2 pixels, high-order tetrad
  3349.     corresponds to first pixel.
  3350.   * Format of image with 8 bits per pixel: each byte of image is
  3351.     index in the palette.
  3352.   * Format of image with 15 bits per pixel: the color of each pixel
  3353.     is coded as (bit representation) 0RRRRRGGGGGBBBBB - 5 bits per
  3354.     each color.
  3355.   * Format of image with 16 bits per pixel: the color of each pixel
  3356.     is coded as RRRRRGGGGGGBBBBB (5+6+5).
  3357.   * Format of image with 24 bits per pixel: the color of each pixel
  3358.     is coded as 3 bytes - sequentially blue, green, red components.
  3359.   * Format of image with 32 bits per pixel: similar to 24, but
  3360.     one additional ignored byte is present.
  3361.   * The call to function 7 is equivalent to call to this function
  3362.     with esi=24, ebp=0.
  3363.  
  3364. ======================================================================
  3365. ================== Function 66 - work with keyboard. =================
  3366. ======================================================================
  3367. The input mode influences results of reading keys by function 2.
  3368. When a program loads, ASCII input mode is set for it.
  3369.  
  3370. -------------- Subfunction 1 - set keyboard input mode. --------------
  3371. Parameters:
  3372.   * eax = 66 - function number
  3373.   * ebx = 1 - subfunction number
  3374.   * ecx = mode:
  3375.     * 0 = normal (ASCII-characters)
  3376.     * 1 = scancodes
  3377. Returned value:
  3378.   * function does not return value
  3379.  
  3380. -------------- Subfunction 2 - get keyboard input mode. --------------
  3381. Parameters:
  3382.   * eax = 66 - function number
  3383.   * ebx = 2 - subfunction number
  3384. Returned value:
  3385.   * eax = current mode
  3386.  
  3387. ------------ Subfunction 3 - get status of control keys. -------------
  3388. Parameters:
  3389.   * eax = 66 - function number
  3390.   * ebx = 3 - subfunction number
  3391. Returned value:
  3392.   * eax = bit mask:
  3393.   * bit 0 (mask 1): left Shift is pressed
  3394.   * bit 1 (mask 2): right Shift is pressed
  3395.   * bit 2 (mask 4): left Ctrl is pressed
  3396.   * bit 3 (mask 8): right Ctrl is pressed
  3397.   * bit 4 (mask 0x10): left Alt is pressed
  3398.   * bit 5 (mask 0x20): right Alt is pressed
  3399.   * bit 6 (mask 0x40): CapsLock is on
  3400.   * bit 7 (mask 0x80): NumLock is on
  3401.   * bit 8 (mask 0x100): ScrollLock is on
  3402.   * other bits are cleared
  3403.  
  3404. -------------- Subfunction 4 - set system-wide hotkey. ---------------
  3405. When hotkey is pressed, the system notifies only those applications,
  3406. which have installed it; the active application (which receives
  3407. all normal input) does not receive such keys.
  3408. The notification consists in sending event with the code 2.
  3409. Reading hotkey is the same as reading normal key - by function 2.
  3410. Parameters:
  3411.   * eax = 66 - function number
  3412.   * ebx = 4 - subfunction number
  3413.   * cl determines key scancode;
  3414.     use cl=0 to give combinations such as Ctrl+Shift
  3415.   * edx = 0xXYZ determines possible states of control keys:
  3416.     * Z (low 4 bits) determines state of LShift and RShift:
  3417.       * 0 = no key must be pressed;
  3418.       * 1 = exactly one key must be pressed;
  3419.       * 2 = both keys must be pressed;
  3420.       * 3 = must be pressed LShift, but not RShift;
  3421.       * 4 = must be pressed RShift, but not LShift
  3422.     * Y - similar for LCtrl and RCtrl;
  3423.     * X - similar for LAlt and RAlt
  3424. Returned value:
  3425.   * eax=0 - success
  3426.   * eax=1 - too mant hotkeys (maximum 256 are allowed)
  3427. Remarks:
  3428.   * Hotkey can work either at pressing or at release. Release
  3429.     scancode of a key is more on 128 than pressing scancode
  3430.     (i.e. high bit is set).
  3431.   * Several applications can set the same combination;
  3432.     all such applications will be informed on pressing
  3433.     such combination.
  3434.  
  3435. -------------- Subfunction 5 - delete installed hotkey. --------------
  3436. Parameters:
  3437.   * eax = 66 - function number
  3438.   * ebx = 5 - subfunction number
  3439.   * cl = scancode of key and edx = 0xXYZ the same as in subfunction 4
  3440. Returned value:
  3441.   * eax = 0 - success
  3442.   * eax = 1 - there is no such hotkey
  3443. Remarks:
  3444.   * When a process/thread terminates, all hotkey installed by it are
  3445.     deleted.
  3446.   * The call to this subfunction does not affect other applications.
  3447.     If other application has defined the same combination, it will
  3448.     still receive notices.
  3449.  
  3450. ======================================================================
  3451. ========= Function 67 - change position/sizes of the window. =========
  3452. ======================================================================
  3453. Parameters:
  3454.   * eax = 67 - function number
  3455.   * ebx = new x-coordinate of the window
  3456.   * ecx = new y-coordinate of the window
  3457.   * edx = new x-size of the window
  3458.   * esi = new y-size of the window
  3459. Returned value:
  3460.   * function does not return value
  3461. Remarks:
  3462.   * The value -1 for a parameter means "do not change"; e.g. to move
  3463.     the window without resizing it is possible to specify edx=esi=-1.
  3464.   * Previously the window must be defined by function 0.
  3465.     It sets initial coordinates and sizes of the window.
  3466.   * Sizes of the window are understood in sense of function 0,
  3467.     that is one pixel less than real sizes.
  3468.   * The function call for maximized windows is simply ignored.
  3469.   * For windows of appropriate styles position and/or sizes can be
  3470.     changed by user; current position and sizes can be obtained by
  3471.     call to function 9.
  3472.   * The function sends to the window redraw event (with the code 1).
  3473.  
  3474. ======================================================================
  3475. ====== Function 68, subfunction 0 - get the task switch counter. =====
  3476. ======================================================================
  3477. Parameters:
  3478.   * eax = 68 - function number
  3479.   * ebx = 0 - subfunction number
  3480. Returned value:
  3481.   * eax = number of task switches from the system booting
  3482.     (modulo 2^32)
  3483.  
  3484. ======================================================================
  3485. ======= Function 68, subfunction 1 - switch to the next thread. ======
  3486. ======================================================================
  3487. The function completes the current time slice allocated to the
  3488. thread and switches to the next. (Which thread in which process
  3489. will be next, is unpredictable). Later, when execution queue
  3490. will reach the current thread, execution will be continued.
  3491. Parameters:
  3492.   * eax = 68 - function number
  3493.   * ebx = 1 - subfunction number
  3494. Returned value:
  3495.   * function does not return value
  3496.  
  3497. ======================================================================
  3498. ============= Function 68, subfunction 2 - cache + rdpmc. ============
  3499. ======================================================================
  3500. Parameters:
  3501.   * eax = 68 - function number
  3502.   * ebx = 2 - subfunction number
  3503.   * ecx = required action:
  3504.     * ecx = 0 - enable instruction 'rdpmc'
  3505.       (ReaD Performance-Monitoring Counters) for applications
  3506.     * ecx = 1 - find out whether cache is disabled/enabled
  3507.     * ecx = 2 - enable cache
  3508.     * ecx = 3 - disable cache
  3509. Returned value:
  3510.   * for ecx=0:
  3511.     * eax = the value of cr4
  3512.   * for ecx=1:
  3513.     * eax = (cr0 and 0x60000000):
  3514.     * eax = 0 - cache is on
  3515.     * eax <> 0 - cache is off
  3516.   * for ecx=2 and ecx=3:
  3517.     * function does not return value
  3518.  
  3519. ======================================================================
  3520. =========== Function 68, subfunction 3 - read MSR-register. ==========
  3521. ======================================================================
  3522. MSR = Model Specific Register; the complete list of MSR-registers
  3523. of a processor is included to the documentation on it (for example,
  3524. IA-32 Intel Architecture Software Developer's Manual,
  3525. Volume 3, Appendix B); each processor family has its own subset
  3526. of the MSR-registers.
  3527. Parameters:
  3528.   * eax = 68 - function number
  3529.   * ebx = 3 - subfunction number
  3530.   * ecx is ignored
  3531.   * edx = MSR address
  3532. Returned value:
  3533.   * ebx:eax = high:low dword of the result
  3534. Remarks:
  3535.   * If ecx contains nonexistent or not implemented for this processor
  3536.     MSR, processor will generate an exception in the kernel, which
  3537.     will kill the thread.
  3538.   * Previously it is necessary to check, whether MSRs are supported
  3539.     as a whole, with the instruction 'cpuid'. Otherwise processor
  3540.     will generate other exception in the kernel, which will anyway
  3541.     kill the thread.
  3542.  
  3543. ======================================================================
  3544. ========= Function 68, subfunction 4 - write to MSR-register. ========
  3545. ======================================================================
  3546. MSR = Model Specific Register; the complete list of MSR-registers
  3547. of a processor is included to the documentation on it (for example,
  3548. IA-32 Intel Architecture Software Developer's Manual,
  3549. Volume 3, Appendix B); each processor family has its own subset
  3550. of the MSR-registers.
  3551. Parameters:
  3552.   * eax = 68 - function number
  3553.   * ebx = 4 - subfunction number
  3554.   * ecx is ignored
  3555.   * edx = MSR address
  3556.   * esi:edi = high:low dword
  3557. Returned value:
  3558.   * function does not return value
  3559. Remarks:
  3560.   * If ecx contains nonexistent or not implemented for this processor
  3561.     MSR, processor will generate an exception in the kernel, which
  3562.     will kill the thread.
  3563.   * Previously it is necessary to check, whether MSRs are supported
  3564.     as a whole, with the instruction 'cpuid'. Otherwise processor
  3565.     will generate other exception in the kernel, which will anyway
  3566.     kill the thread.
  3567.  
  3568. ======================================================================
  3569. ======= Function 68, subfunction 11 - initialize process heap. =======
  3570. ======================================================================
  3571. Parameters:
  3572.   * eax = 68 - function number
  3573.   * ebx = 11 - subfunction number
  3574. Returned value:
  3575.   * eax = 0 - failed
  3576.   * otherwise size of created heap
  3577. Remarks:
  3578.   * The function call initializes heap, from which one can in future
  3579.     allocate and free memory blocks with subfunctions 12 and 13.
  3580.     Heap size is equal to total amount of free application memory.
  3581.   * The second function call from the same process results in
  3582.     returning the size of the existing heap.
  3583.   * After creation of the heap calls to function 64 will be ignored.
  3584.  
  3585. ======================================================================
  3586. ======== Function 68, subfunction 12 - allocate memory block. ========
  3587. ======================================================================
  3588. Parameters:
  3589.   * eax = 68 - function number
  3590.   * ebx = 12 - subfunction number
  3591.   * ecx = required size in bytes
  3592. Returned value:
  3593.   * eax = pointer to the allocated block
  3594. Remarks:
  3595.   * Before this call one must initialize process heap by call to
  3596.     subfunction 11.
  3597.   * The function allocates an integer number of pages (4 Kb) in such
  3598.     way that the real size of allocated block is more than or equal to
  3599.     requested size.
  3600.  
  3601. ======================================================================
  3602. ========== Function 68, subfunction 13 - free memory block. ==========
  3603. ======================================================================
  3604. Parameters:
  3605.   * eax = 68 - function number
  3606.   * ebx = 13 - subfunction number
  3607.   * ecx = pointer to the memory block
  3608. Returned value:
  3609.   * eax = 1 - success
  3610.   * eax = 0 - failed
  3611. Remarks:
  3612.   * The memory block must have been allocated by subfunction 12
  3613.     or subfunction 20.
  3614.  
  3615. ======================================================================
  3616. ===================== Function 68, subfunction 14 ====================
  3617. ====== Waiting delivering of signal from another program/driver ======
  3618. ======================================================================
  3619. Parameters:
  3620.   * eax = 68 - function number
  3621.   * ebx = 14 - subfunction number
  3622.   * ecx = pointer to the buffer for information (24 bytes)
  3623. Returned value:
  3624.   * buffer pointed to by ecx contains the following information:
  3625.     * +0: dword: identifier for underlying data of signal
  3626.     * +4: data of signal (20 bytes), format of which is defining by
  3627.           first dword
  3628.  
  3629. ======================================================================
  3630. ====== Function 68, subfunction 15 - set FPU exception handler. ======
  3631. ======================================================================
  3632. Deleted (in current implementation only 0 is returned).
  3633. Using subfunctions 24, 25 is true.
  3634.  
  3635. ======================================================================
  3636. ============= Function 68, subfunction 16 - load driver. =============
  3637. ======================================================================
  3638. Parameters:
  3639.   * eax = 68 - function number
  3640.   * ebx = 16 - subfunction number
  3641.   * ecx = pointer to ASCIIZ-string with driver name
  3642. Returned value:
  3643.   * eax = 0 - failed
  3644.   * otherwise eax = driver handle
  3645. Remarks:
  3646.   * If the driver was not loaded yet, it is loaded;
  3647.     if the driver was loaded yet, nothing happens.
  3648.   * Driver name is case-sensitive.
  3649.     Maximum length of the name is 16 characters, including
  3650.     terminating null character, the rest is ignored.
  3651.   * Driver ABC is loaded from file /rd/1/drivers/ABC.obj.
  3652.  
  3653. ======================================================================
  3654. ============ Function 68, subfunction 17 - driver control. ===========
  3655. ======================================================================
  3656. Parameters:
  3657.   * eax = 68 - function number
  3658.   * ebx = 17 - subfunction number
  3659.   * ecx = pointer to the control structure:
  3660.     * +0: dword: handle of driver
  3661.     * +4: dword: code of driver function
  3662.     * +8: dword: pointer to input data
  3663.     * +12 = +0xC: dword: size of input data
  3664.     * +16 = +0x10: dword: pointer to output data
  3665.     * +20 = +0x14: dword: size of output data
  3666. Returned value:
  3667.   * eax =  error code
  3668.       0  - successful call
  3669.      -1  - any error.
  3670.      -2, -3, -4, etc. reserved for kernel error codes
  3671.       1, 2, 3, etc    driver specific error codes
  3672. Remarks:
  3673.   * Function codes and the structure of input/output data
  3674.     are defined by driver.
  3675.   * Previously one must obtain driver handle by subfunction 16.
  3676.  
  3677. ======================================================================
  3678. ====== Function 68, subfunction 18 - set SSE exception handler. ======
  3679. ======================================================================
  3680. Deleted (in current implementation only 0 is returned).
  3681. Using subfunctions 24, 25 is true.
  3682.  
  3683. ======================================================================
  3684. =============== Function 68, subfunction 19 - load DLL. ==============
  3685. ======================================================================
  3686. Parameters:
  3687.   * eax = 68 - function number
  3688.   * ebx = 19 - subfunction number
  3689.   * ecx = pointer to ASCIIZ-string with the full path to DLL
  3690. Returned value:
  3691.   * eax = 0 - failed
  3692.   * otherwise eax = pointer to DLL export table
  3693. Remarks:
  3694.   * Export table is an array of structures of 2 dword's, terminated
  3695.     by zero. The first dword in structure points to function name,
  3696.     the second dword contains address of function.
  3697.  
  3698. ======================================================================
  3699. ======= Function 68, subfunction 20 - reallocate memory block. =======
  3700. ======================================================================
  3701. Parameters:
  3702.   * eax = 68 - function number
  3703.   * ebx = 20 - subfunction number
  3704.   * ecx = new size in bytes
  3705.   * edx = pointer to already allocated block
  3706. Returned value:
  3707.   * eax = pointer to the reallocated block, 0 = error
  3708. Remarks:
  3709.   * Before this call one must initialize process heap by call to
  3710.     subfunction 11.
  3711.   * The function allocates an integer number of pages (4 Kb) in such
  3712.     way that the real size of allocated block is more than or equal to
  3713.     requested size.
  3714.   * If edx=0, the function call is equivalent to memory allocation
  3715.     with subfunction 12. Otherwise the block at edx
  3716.     must be allocated earlier with subfunction 12 or this subfunction.
  3717.   * If ecx=0, the function frees memory block at edx and returns 0.
  3718.   * The contents of the block are unchanged up to the shorter of
  3719.     the new and old sizes.
  3720.  
  3721. ======================================================================
  3722. ====== Function 68, subfunction 24 - set new exceptions handler ======
  3723. ======================================================================
  3724. Parameters:
  3725.   * eax = 68 - function number
  3726.   * ebx = 24 - subfunction number
  3727.   * ecx = address of the new exception handler
  3728.   * edx = the mask of processing exceptions
  3729. Returned value:
  3730.   * eax = address of the old exception handler (0, if it was not set)
  3731.   * ebx = the old mask of exception handler
  3732. Remarks:
  3733.   * Bit number in mask of exceptions is correspond to exception number
  3734.     by CPU-specification (Intel-PC). For example, FPU-exception have
  3735.     number 16 (#MF), and SSE-exception - 19 (#XF)
  3736.   * The current implementation ignore the inquiry for hook of 7
  3737.     exception - system process #NM by one's own.
  3738.   * User handler get exception number in stack parameter. So, correct
  3739.     exit from handler is: RET 4. Return from handler is to the same
  3740.     instruction, that was cause the exception
  3741.   * When control is transfering to user handler, corresponding bit in
  3742.     exception mask is clearing. Rising this exception in consequence
  3743.     - reduce to default-handling. Exactly: terminating the application,
  3744.     or suspending with debug-notify to owner.
  3745.   * After completion of critical operations in user handler, it may be
  3746.     rising corresponding bit in exception mask by using subfunction 25
  3747.     Clearing exceptions flags in FPU and/or XMM modules - is
  3748.     responsibility of user handler too.
  3749.  
  3750. ======================================================================
  3751. ==== Function 68, subfunction 25 - change state of signal activity ===
  3752. ======================================================================
  3753. Parameters:
  3754.   * eax = 68 - function number
  3755.   * ebx = 25 - subfunction number
  3756.   * ecx = signal number
  3757.   * edx = value of activity (0/1)
  3758. Returned value:
  3759.   * eax = value of old activity for this signal (0/1)
  3760. Remarks:
  3761.   * In current implementation, it is changed only exception mask for
  3762.     user exception handler, wich was previously set by subfunction 24.
  3763.     At that, number of signal correspond to exception number.
  3764.  
  3765. ======================================================================
  3766. ====================== Fucntion 69 - debugging. ======================
  3767. ======================================================================
  3768. A process can load other process as debugged by set of corresponding
  3769. bit by call to subfunction 7 of function 70.
  3770. A process can have only one debugger; one process can debug some
  3771. others. The system notifies debugger on events occuring with
  3772. debugged process. Messages are written to the buffer defined by
  3773. subfunction 0.
  3774. Format of a message:
  3775.   * +0: dword: message code
  3776.   * +4: dword: PID of debugged process
  3777.   * +8: there can be additional data depending on message code
  3778. Message codes:
  3779.   * 1 = exception
  3780.     * in addition dword-number of the exception is given
  3781.     * process is suspended
  3782.   * 2 = process has terminated
  3783.     * comes at any termination: both through the system function -1,
  3784.       and at "murder" by any other process (including debugger itself)
  3785.   * 3 = debug exception int 1 = #DB
  3786.     * in addition dword-image of the register DR6 is given:
  3787.       * bits 0-3: condition of the corresponding breakpoint (set by
  3788.         subfunction 9) is satisfied
  3789.       * сшЄ 14: exception has occured because of the trace mode
  3790.         (flag TF is set TF)
  3791.     * process is suspended
  3792. When debugger terminates, all debugged processes are killed.
  3793. If debugger does not want this, it must previously detach by
  3794. subfunction 3.
  3795.  
  3796. All subfunctions are applicable only to processes/threads started
  3797. from the current by function 70 with set debugging flag.
  3798. Debugging of multithreaded programs is not supported yet.
  3799. The full list of subfunctions:
  3800.   * subfunction 0 - define data area for debug messages
  3801.   * subfunction 1 - get contents of registers of debugged thread
  3802.   * subfunction 2 - set contents of registers of debugged thread
  3803.   * subfunction 3 - detach from debugged process
  3804.   * subfunction 4 - suspend debugged thread
  3805.   * subfunction 5 - resume debugged thread
  3806.   * subfunction 6 - read from the memory of debugged process
  3807.   * subfunction 7 - write to the memory of debugged process
  3808.   * subfunction 8 - terminate debugged thread
  3809.   * subfunction 9 - set/clear hardware breakpoint
  3810.  
  3811. ======================================================================
  3812. = Function 69, subfunction 0 - define data area fror debug messages. =
  3813. ======================================================================
  3814. Parameters:
  3815.   * eax = 69 - function number
  3816.   * ebx = 0 - subfunction number
  3817.   * ecx = pointer
  3818. Format of data area:
  3819.   * +0: dword: N = buffer size (not including this header)
  3820.   * +4: dword: occupied place
  3821.   * +8: N*byte: buffer
  3822. Returned value:
  3823.   * function does not return value
  3824. Remarks:
  3825.   * If the size field is negative, the buffer is considered locked
  3826.     and at arrival of new message the system will wait.
  3827.     For synchronization frame all work with the buffer by operations
  3828.     lock/unlock
  3829.         neg     [bufsize]
  3830.   * Data in the buffer are considered as array of items with variable
  3831.     length - messages. Format of a message is explained in
  3832.     general description.
  3833.  
  3834. ======================================================================
  3835. ===================== Function 69, subfunction 1 =====================
  3836. ============ Get contents of registers of debugged thread. ===========
  3837. ======================================================================
  3838. Parameters:
  3839.   * eax = 69 - function number
  3840.   * ebx = 1 - subfunction number
  3841.   * ecx = thread identifier
  3842.   * edx = size of context structure, must be 0x28=40 bytes
  3843.   * esi = pointer to context structure
  3844. Returned value:
  3845.   * function does not return value
  3846. Format of context structure: (FPU is not supported yet)
  3847.   * +0: dword: eip
  3848.   * +4: dword: eflags
  3849.   * +8: dword: eax
  3850.   * +12 = +0xC: dword: ecx
  3851.   * +16 = +0x10: dword: edx
  3852.   * +20 = +0x14: dword: ebx
  3853.   * +24 = +0x18: dword: esp
  3854.   * +28 = +0x1C: dword: ebp
  3855.   * +32 = +0x20: dword: esi
  3856.   * +36 = +0x24: dword: edi
  3857. Remarks:
  3858.   * If the thread executes code of ring-0, the function returns
  3859.     contents of registers of ring-3.
  3860.   * Process must be loaded for debugging (as is shown in
  3861.     general description).
  3862.  
  3863. ======================================================================
  3864. ===================== Function 69, subfunction 2 =====================
  3865. ============ Set contents of registers of debugged thread. ===========
  3866. ======================================================================
  3867. Parameters:
  3868.   * eax = 69 - function number
  3869.   * ebx = 2 - subfunction number
  3870.   * ecx = thread identifier
  3871.   * edx = size of context structure, must be 0x28=40 bytes
  3872. Returned value:
  3873.   * function does not return value
  3874. Format of context structure is shown in the description of
  3875. subfunction 1.
  3876. Remarks:
  3877.   * If the thread executes code of ring-0, the function returns
  3878.     contents of registers of ring-3.
  3879.   * Process must be loaded for debugging (as is shown in
  3880.     general description).
  3881.  
  3882. ======================================================================
  3883. ===== Function 69, subfunction 3 - detach from debugged process. =====
  3884. ======================================================================
  3885. Parameters:
  3886.   * eax = 69 - function number
  3887.   * ebx = 3 - subfunction number
  3888.   * ecx = identifier
  3889. Returned value:
  3890.   * function does not return value
  3891. Remarks:
  3892.   * If the process was suspended, it resumes execution.
  3893.  
  3894. ======================================================================
  3895. ======== Function 69, subfunction 4 - suspend debugged thread. =======
  3896. ======================================================================
  3897. Parameters:
  3898.   * eax = 69 - function number
  3899.   * ebx = 4 - subfunction number
  3900.   * ecx = thread identifier
  3901. Returned value:
  3902.   * function does not return value
  3903. Remarks:
  3904.   * Process must be loaded for debugging (as is shown in
  3905.     general description).
  3906.  
  3907. ======================================================================
  3908. ======== Function 69, subfunction 5 - resume debugged thread. ========
  3909. ======================================================================
  3910. Parameters:
  3911.   * eax = 69 - function number
  3912.   * ebx = 5 - subfunction number
  3913.   * ecx = thread identifier
  3914. Returned value:
  3915.   * function does not return value
  3916. Remarks:
  3917.   * Process must be loaded for debugging (as is shown in
  3918.     general description).
  3919.  
  3920. ======================================================================
  3921. = Fucntion 69, subfunction 6 - read from memory of debugged process. =
  3922. ======================================================================
  3923. Parameters:
  3924.   * eax = 69 - function number
  3925.   * ebx = 6 - subfunction number
  3926.   * ecx = identifier
  3927.   * edx = number of bytes to read
  3928.   * esi = address in the memory of debugged process
  3929.   * edi = pointer to buffer for data
  3930. Returned value:
  3931.   * eax = -1 at an error (invalid PID or buffer)
  3932.   * otherwise eax = number of read bytes (possibly, 0,
  3933.     if esi is too large)
  3934. Remarks:
  3935.   * Process must be loaded for debugging (as is shown in
  3936.     general description).
  3937.  
  3938. ======================================================================
  3939. == Function 69, subfunction 7 - write to memory of debugged process. =
  3940. ======================================================================
  3941. Parameters:
  3942.   * eax = 69 - function number
  3943.   * ebx = 7 - subfunction number
  3944.   * ecx = identifier
  3945.   * edx = number of bytes to write
  3946.   * esi = address of memory in debugged process
  3947.   * edi = pointer to data
  3948. Returned value:
  3949.   * eax = -1 at an error (invalid PID or buffer)
  3950.   * otherwise eax = number of written bytes (possibly, 0,
  3951.     if esi is too large)
  3952. Remarks:
  3953.   * Process must be loaded for debugging (as is shown in
  3954.     general description).
  3955.  
  3956. ======================================================================
  3957. ======= Function 69, subfunction 8 - terminate debugged thread. ======
  3958. ======================================================================
  3959. Parameters:
  3960.   * eax = 69 - function number
  3961.   * ebx = 8 - subfunction number
  3962.   * ecx = identifier
  3963. Returned value:
  3964.   * function does not return value
  3965. Remarks:
  3966.   * Process must be loaded for debugging (as is shown in
  3967.     general description).
  3968.   * The function is similar to subfunction 2 of function 18
  3969.     with two differences: it requires first remark and
  3970.     accepts PID rather than slot number.
  3971.  
  3972. ======================================================================
  3973. ===== Function 69, subfunction 9 - set/clear hardware breakpoint. ====
  3974. ======================================================================
  3975. Parameters:
  3976.   * eax = 69 - function number
  3977.   * ebx = 9 - subfunction number
  3978.   * ecx = thread identifier
  3979.   * dl = index of breakpoint, from 0 to 3 inclusively
  3980.   * dh = flags:
  3981.     * if high bit is cleared - set breakpoint:
  3982.       * bits 0-1 - condition:
  3983.         * 00 = breakpoint on execution
  3984.         * 01 = breakpoint on read
  3985.         * 11 = breakpoint on read/write
  3986.       * bits 2-3 - length; for breakpoints on exception it must be
  3987.         00, otherwise one of
  3988.         * 00 = byte
  3989.         * 01 = word
  3990.         * 11 = dword
  3991.       * esi = breakpoint address; must be aligned according to
  3992.         the length (i.e. must be even for word breakpoints,
  3993.         divisible by 4 for dword)
  3994.     * if high bit is set - clear breakpoint
  3995. Returned value:
  3996.   * eax = 0 - success
  3997.   * eax = 1 - error in the input data
  3998.   * eax = 2 - (reserved, is never returned in the current
  3999.     implementation) a global breakpoint with that index is already set
  4000. Remarks:
  4001.   * Process must be loaded for debugging (as is shown in
  4002.     general description).
  4003.   * Hardware breakpoints are implemented through DRx-registers of
  4004.     the processor, all limitations results from this.
  4005.   * The function can reinstall the breakpoint, previously set
  4006.     by it (and it does not inform on this).
  4007.     Carry on the list of set breakpoints in the debugger.
  4008.   * Breakpoints generate debug exception #DB, on which the system
  4009.     notifies debugger.
  4010.   * Breakpoints on write and read/write act after
  4011.     execution of the caused it instruction.
  4012.  
  4013. ======================================================================
  4014. ==== Function 70 - work with file system with long names support. ====
  4015. ======================================================================
  4016. Parameters:
  4017.   * eax = 70
  4018.   * ebx = pointer to the information structure
  4019. Returned value:
  4020.   * eax = 0 - success; otherwise file system error code
  4021.   * some subfunctions return value in other registers too
  4022. General format of the information structure:
  4023.   * +0: dword: subfunction number
  4024.   * +4: dword: file offset
  4025.   * +8: dword: high dword of offset (must be 0) or flags field
  4026.   * +12 = +0xC: dword: size
  4027.   * +16 = +0x10: dword: pointer to data
  4028.   * +20 = +0x14: n db: ASCIIZ-string with the filename
  4029.     or
  4030.   * +20 = +0x14: db 0
  4031.   * +21 = +0x15: dd pointer to ASCIIZ-string with the filename
  4032. Specifications - in documentation on the appropriate subfunction.
  4033. Filename is case-insensitive. Russian letters must be written in
  4034. the encoding cp866 (DOS).
  4035. Format of filename:
  4036. /base/number/dir1/dir2/.../dirn/file,
  4037. where /base/number identifies device, on which file is located:
  4038. one of
  4039.   * /RD/1 = /RAMDISK/1 to access ramdisk
  4040.   * /FD/1 = /FLOPPYDISK/1 to access first floppy drive,
  4041.     /FD/2 = /FLOPPYDISK/2 to access second one
  4042.   * /HD0/x, /HD1/x, /HD2/x, /HD3/x to access accordingly to devices
  4043.     IDE0 (Primary Master), IDE1 (Primary Slave),
  4044.     IDE2 (Secondary Master), IDE3 (Secondary Slave);
  4045.     x - partition number on the selected hard drive, varies from 1
  4046.     to 255 (on each hard drive the indexing starts from 1)
  4047.   * /CD0/1, /CD1/1, /CD2/1, /CD3/1 to access accordingly to
  4048.     CD on IDE0 (Primary Master), IDE1 (Primary Slave),
  4049.     IDE2 (Secondary Master), IDE3 (Secondary Slave)
  4050.   * /SYS means system folder; with the usual boot (from floppy)
  4051.     is equivalent to /RD/1
  4052. Examples:
  4053.   * '/rd/1/kernel.asm',0
  4054.   * '/HD0/1/kernel.asm',0
  4055.   * '/hd0/2/menuet/pics/tanzania.bmp',0
  4056.   * '/hd0/1/Program files/NameOfProgram/SomeFile.SomeExtension',0
  4057.   * '/sys/MySuperApp.ini',0
  4058. Available subfunctions:
  4059.   * subfunction 0 - read file
  4060.   * subfunction 1 - read folder
  4061.   * subfunction 2 - create/rewrite file
  4062.   * subfunction 3 - write to existing file
  4063.   * subfunction 4 - set file size
  4064.   * subfunction 5 - get attributes of file/folder
  4065.   * subfunction 6 - set attributes of file/folder
  4066.   * subfunction 7 - start application
  4067.   * subfunction 8 - delete file/folder
  4068.   * subfunction 9 - create folder
  4069. For CD-drives due to hardware limitations only subfunctions
  4070. 0,1,5 and 7 are available, other subfunctions return error
  4071. with code 2.
  4072. At the first call of subfunctions 0,1,5,7 to ATAPI devices
  4073. (CD and DVD) the manual control of tray is locked due to caching
  4074. drive data. Unlocking is made when subfunction 4 of function 24
  4075. is called for corresponding device.
  4076.  
  4077. ======================================================================
  4078. === Function 70, subfunction 0 - read file with long names support. ==
  4079. ======================================================================
  4080. Parameters:
  4081.   * eax = 70 - function number
  4082.   * ebx = pointer to the information structure
  4083. Format of the information structure:
  4084.   * +0: dword: 0 = subfunction number
  4085.   * +4: dword: file offset (in bytes)
  4086.   * +8: dword: 0 (reserved for high dword of offset)
  4087.   * +12 = +0xC: dword: number of bytes to read
  4088.   * +16 = +0x10: dword: pointer to buffer for data
  4089.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4090.     given in the general description
  4091.     or
  4092.   * +20 = +0x14: db 0
  4093.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4094. Returned value:
  4095.   * eax = 0 - success, otherwise file system error code
  4096.   * ebx = number of read bytes or -1=0xffffffff if file was not found
  4097. Remarks:
  4098.   * If file was ended before last requested block was read,
  4099.     the function will read as many as it can, and after that return
  4100.     eax=6 (EOF).
  4101.   * The function does not allow to read folder (returns eax=10,
  4102.     access denied).
  4103.  
  4104. ======================================================================
  4105. == Function 70, subfunction 1 - read folder with long names support. =
  4106. ======================================================================
  4107. Parameters:
  4108.   * eax = 70 - function number
  4109.   * ebx = pointer to the information structure
  4110. Format of the information structure:
  4111.   * +0: dword: 1 = subfunction number
  4112.   * +4: dword: index of starting block (beginning from 0)
  4113.   * +8: dword: flags field:
  4114.     * bit 0 (mask 1): in what format to return names,
  4115.       0=ANSI, 1=UNICODE
  4116.     * other bits are reserved and must be set to 0 for the future
  4117.       compatibility
  4118.   * +12 = +0xC: dword: number of blocks to read
  4119.   * +16 = +0x10: dword: pointer to buffer for data, buffer size
  4120.     must be not less than 32 + [+12]*560 bytes
  4121.   * +20 = +0x14: ASCIIZ-name of folder, the rules of names forming are
  4122.     given in the general description
  4123.     or
  4124.   * +20 = +0x14: db 0
  4125.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4126. Returned value:
  4127.   * eax = 0 - success, otherwise file system error code
  4128.   * ebx = number of files, information on which was written to
  4129.     the buffer, or -1=0xffffffff, if folder was not found
  4130. Structure of the buffer:
  4131.   * +0: 32*byte: header
  4132.   * +32 = +0x20: n1*byte: block with information on file 1
  4133.   * +32+n1: n2*byte: block with information on file 2
  4134.   * ...
  4135. Structure of header:
  4136.   * +0: dword: version of structure (current is 1)
  4137.   * +4: dword: number of placed blocks; is not greater than requested
  4138.     in the field +12 of information structure; can be less, if
  4139.     there are no more files in folder (the same as in ebx)
  4140.   * +8: dword: total number of files in folder
  4141.   * +12 = +0xC: 20*byte: reserved (zeroed)
  4142. Structure of block of data for folder entry (BDFE):
  4143.   * +0: dword: attributes of file:
  4144.     * bit 0 (mask 1): file is read-only
  4145.     * bit 1 (mask 2): file is hidden
  4146.     * bit 2 (mask 4): file is system
  4147.     * bit 3 (mask 8): this is not a file but volume label
  4148.       (for one partition meets no more than once and
  4149.       only in root folder)
  4150.     * bit 4 (mask 0x10): this is a folder
  4151.     * bit 5 (mask 0x20): file was not archived - many archivation
  4152.       programs have an option to archive only files with this bit set,
  4153.       and after archiving this bit is cleared - it can be useful
  4154.       for automatically creating of backup-archives as at writing
  4155.       this bit is usually set
  4156.   * +4: byte: type of name data:
  4157.     (coincides with bit 0 of flags in the information structure)
  4158.     * 0 = ASCII = 1-byte representation of each character
  4159.     * 1 = UNICODE = 2-byte representation of each character
  4160.   * +5: 3*byte: reserved (zero)
  4161.   * +8: 4*byte: time of file creation
  4162.   * +12 = +0xC: 4*byte: date of file creation
  4163.   * +16 = +0x10: 4*byte: time of last access (read or write)
  4164.   * +20 = +0x14: 4*byte: date of last access
  4165.   * +24 = +0x18: 4*byte: time of last modification
  4166.   * +28 = +0x1C: 4*byte: date of last modification
  4167.   * +32 = +0x20: qword: file size in bytes (up to 16777216 Tb)
  4168.   * +40 = +0x28: name
  4169.     * for ASCII format: maximum length is 263 characters
  4170.       (263 bytes), byte after the name has value 0
  4171.     * for UNICODE format: maximum length is 259 characters
  4172.       (518 bytes), 2 bytes after the name have value 0
  4173. Time format:
  4174.   * +0: byte: seconds
  4175.   * +1: byte: minutes
  4176.   * +2: byte: hours
  4177.   * +3: byte: reserved (0)
  4178.   * for example, 23.59.59 is written as (in hex) 3B 3B 17 00
  4179. Date format:
  4180.   * +0: byte: day
  4181.   * +1: byte: month
  4182.   * +2: word: year
  4183.   * for example, 25.11.1979 is written as (in hex) 19 0B BB 07
  4184. Remarks:
  4185.   * If BDFE contains ASCII name, the length of BDFE is 304 bytes,
  4186.     if UNICODE name - 560 bytes. Value of length is aligned
  4187.     on 16-byte bound (to accelerate processing in CPU cache).
  4188.   * First character after a name is zero (ASCIIZ-string). The further
  4189.     data contain garbage.
  4190.   * If files in folder were ended before requested number was read,
  4191.     the function will read as many as it can, and after that return
  4192.     eax=6 (EOF).
  4193.   * Any folder on the disk, except for root, contains two special
  4194.     entries "." and "..", identifying accordingly the folder itself
  4195.     and the parent folder.
  4196.   * The function allows also to read virtual folders "/", "/rd",
  4197.     "/fd", "/hd[n]", thus attributes of subfolders are set to 0x10,
  4198.     and times and dates are zeroed. An alternative way to get the
  4199.     equipment information - subfunction 11 of function 18.
  4200.  
  4201. ======================================================================
  4202. ===================== Function 70, subfunction 2 =====================
  4203. ============ Create/rewrite file with long names support. ============
  4204. ======================================================================
  4205. Parameters:
  4206.   * eax = 70 - function number
  4207.   * ebx = pointer to the information structure
  4208. Format of the information structure:
  4209.   * +0: dword: 2 = subfunction number
  4210.   * +4: dword: 0 (reserved)
  4211.   * +8: dword: 0 (reserved)
  4212.   * +12 = +0xC: dword: number of bytes to read
  4213.   * +16 = +0x10: dword: pointer to data
  4214.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4215.     given in the general description
  4216.     or
  4217.   * +20 = +0x14: db 0
  4218.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4219. Returned value:
  4220.   * eax = 0 - success, otherwise file system error code
  4221.   * ebx = number of written bytes (possibly 0)
  4222. Remarks:
  4223.   * If a file with given name did not exist, it is created;
  4224.     if it existed, it is rewritten.
  4225.   * If there is not enough free space on disk, the function will
  4226.     write as many as can and then return error code 8.
  4227.   * The function is not supported for CD (returns error code 2).
  4228.  
  4229. ======================================================================
  4230. ===================== Function 70, subfunction 3 =====================
  4231. =========== Write to existing file with long names support. ==========
  4232. ======================================================================
  4233. Parameters:
  4234.   * eax = 70 - function number
  4235.   * ebx = pointer to the information structure
  4236. Format of the information structure:
  4237.   * +0: dword: 3 = subfunction number
  4238.   * +4: dword: file offset (in bytes)
  4239.   * +8: dword: high dword of offset (must be 0 for FAT)
  4240.   * +12 = +0xC: dword: number of bytes to write
  4241.   * +16 = +0x10: dword: pointer to data
  4242.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4243.     given in the general description
  4244.     or
  4245.   * +20 = +0x14: db 0
  4246.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4247. Returned value:
  4248.   * eax = 0 - success, otherwise file system error code
  4249.   * ebx = number of written bytes (possibly 0)
  4250. Remarks:
  4251.   * The file must already exist, otherwise function returns eax=5.
  4252.   * The only result of write 0 bytes is update in the file attributes
  4253.     date/time of modification and access to the current date/time.
  4254.   * If beginning and/or ending position is greater than file size
  4255.     (except for the previous case), the file is expanded to needed
  4256.     size with zero characters.
  4257.   * The function is not supported for CD (returns error code 2).
  4258.  
  4259. ======================================================================
  4260. ============ Function 70, subfunction 4 - set end of file. ===========
  4261. ======================================================================
  4262. Parameters:
  4263.   * eax = 70 - function number
  4264.   * ebx = pointer to the information structure
  4265. Format of the information structure:
  4266.   * +0: dword: 4 = subfunction number
  4267.   * +4: dword: low dword of new file size
  4268.   * +8: dword: high dword of new file size (must be 0 for FAT)
  4269.   * +12 = +0xC: dword: 0 (reserved)
  4270.   * +16 = +0x10: dword: 0 (reserved)
  4271.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4272.     given in the general description
  4273.     or
  4274.   * +20 = +0x14: db 0
  4275.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4276. Returned value:
  4277.   * eax = 0 - success, otherwise file system error code
  4278.   * ebx destroyed
  4279. Remarks:
  4280.   * If the new file size is less than old one, file is truncated.
  4281.     If the new size is greater than old one, file is expanded with
  4282.     characters with code 0. If the new size is equal to old one,
  4283.     the only result of call is set date/time of modification and
  4284.     access to the current date/time.
  4285.   * If there is not enough free space on disk for expansion, the
  4286.     function will expand to maximum possible size and then return
  4287.     error code 8.
  4288.   * The function is not supported for CD (returns error code 2).
  4289.  
  4290. ======================================================================
  4291. ==== Function 70, subfunction 5 - get information on file/folder. ====
  4292. ======================================================================
  4293. Parameters:
  4294.   * eax = 70 - function number
  4295.   * ebx = pointer to the information structure
  4296. Format of the information structure:
  4297.   * +0: dword: 5 = subfunction number
  4298.   * +4: dword: 0 (reserved)
  4299.   * +8: dword: 0 (reserved)
  4300.   * +12 = +0xC: dword: 0 (reserved)
  4301.   * +16 = +0x10: dword: pointer to buffer for data (40 bytes)
  4302.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4303.     given in the general description
  4304.     or
  4305.   * +20 = +0x14: db 0
  4306.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4307. Returned value:
  4308.   * eax = 0 - success, otherwise file system error code
  4309.   * ebx destroyed
  4310. Information on file is returned in the BDFE format (block of data
  4311. for folder entry), explained in the description of
  4312. subfunction 1, but without filename
  4313. (i.e. only first 40 = 0x28 bytes).
  4314. Remarks:
  4315.   * The function does not support virtual folders such as /, /rd and
  4316.     root folders like /rd/1.
  4317.  
  4318. ======================================================================
  4319. ===== Function 70, subfunction 6 - set attributes of file/folder. ====
  4320. ======================================================================
  4321. Parameters:
  4322.   * eax = 70 - function number
  4323.   * ebx = pointer to the information structure
  4324. Format of the information structure:
  4325.   * +0: dword: 6 = subfunction number
  4326.   * +4: dword: 0 (reserved)
  4327.   * +8: dword: 0 (reserved)
  4328.   * +12 = +0xC: dword: 0 (reserved)
  4329.   * +16 = +0x10: dword: pointer to buffer with attributes (32 bytes)
  4330.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4331.     given in the general description
  4332.     or
  4333.   * +20 = +0x14: db 0
  4334.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4335. Returned value:
  4336.   * eax = 0 - success, otherwise file system error code
  4337.   * ebx destroyed
  4338. File attributes are first 32 bytes in BDFE (block of data
  4339. for folder entry), explained in the description of subfunction 1
  4340. (that is, without name and size of file). Attribute
  4341. file/folder/volume label (bits 3,4 in dword +0) is not changed.
  4342. Byte +4 (name format) is ignored.
  4343. Remarks:
  4344.   * The function does not support virtual folders such as /, /rd and
  4345.     root folders like /rd/1.
  4346.   * The function is not supported for CD (returns error code 2).
  4347.  
  4348. ======================================================================
  4349. =========== Function 70, subfunction 7 - start application. ==========
  4350. ======================================================================
  4351. Parameters:
  4352.   * eax = 70 - function number
  4353.   * ebx = pointer to the information structure
  4354. Format of the information structure:
  4355.   * +0: dword: 7 = subfunction number
  4356.   * +4: dword: flags field:
  4357.     * сшЄ 0: start process as debugged
  4358.     * other bits are reserved and must be set to 0
  4359.   * +8: dword: 0 or pointer to ASCIIZ-string with parameters
  4360.   * +12 = +0xC: dword: 0 (reserved)
  4361.   * +16 = +0x10: dword: 0 (reserved)
  4362.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4363.     given in the general description
  4364.     or
  4365.   * +20 = +0x14: db 0
  4366.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4367. Returned value:
  4368.   * eax > 0 - program is loaded, eax contains PID
  4369.   * eax < 0 - an error has occured, -eax contains
  4370.     file system error code
  4371.   * ebx destroyed
  4372. Remarks:
  4373.   * Command line must be terminated by the character with the code 0
  4374.     (ASCIIZ-string); function takes into account either all characters
  4375.     up to terminating zero inclusively or first 256 character
  4376.     regarding what is less.
  4377.   * If the process is started as debugged, it is created in
  4378.     the suspended state; to run use subfunction 5 of function 69.
  4379.  
  4380. ======================================================================
  4381. ========== Function 70, subfunction 8 - delete file/folder. ===