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  1. SYSTEM FUNCTIONS of OS Kolibri 0.6.4.0
  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.       * other possible values (from 4 up to 15) are reserved,
  26.         function call with such Y is ignored
  27.     * RR, GG, BB = accordingly red, green, blue components of a color
  28.       of the working area of the window (are ignored for style Y=2)
  29.     * X = DCBA (bits)
  30.       * A = 1 - window has caption; for style Y=3 caption string
  31.                   must be passed in edi, for other styles use
  32.                   subfunction 1 of function 71
  33.       * B = 1 - coordinates of all graphics primitives are relative to
  34.                   window client area
  35.       * C = 1 - don't fill working area on window draw
  36.       * D = 0 - normal filling of the working area, 1 - gradient
  37.     The following parameters are intended for windows
  38.     of a type I and II, and ignored for styles Y=1,3:
  39.   * esi = 0xXYRRGGBB - color of the header
  40.     * RR, GG, BB define color
  41.     * Y=0 - usual window, Y=1 - unmovable window
  42.     * X defines a gradient of header: X=0 - no gradient,
  43.       X=8 - usual gradient,
  44.       for windows of a type II X=4 - negative gradient
  45.     * other values of X and Y are reserved
  46.   * edi = 0x00RRGGBB - color of the frame
  47. Returned value:
  48.   * function does not return value
  49. Remarks:
  50.   * Position and sizes of the window are installed by the first
  51.     call of this function and are ignored at subsequent; to change
  52.     position and/or sizes of already created window use function 67.
  53.   * For windows with style Y=3 and caption (A=1) caption string is set
  54.     by the first call of this function and is ignored at subsequent
  55.     (strictly speaking, is ignored after a call to subfunction 2
  56.     of function 12 - end redraw); to change caption of already created
  57.     window use subfunction 1 of function 71.
  58.   * If the window has appropriate styles, position and/or sizes can be
  59.     changed by user. Current position and sizes can be obtained
  60.     by function 9.
  61.   * The window must fit on the screen. If the transferred
  62.     coordinates and sizes do not satisfy to this condition,
  63.     appropriate coordinate (or, probably, both) is considered as zero,
  64.     and if it does not help too, the appropriate size
  65.     (or, probably, both) is installed in a size of the screen.
  66.    
  67.     Further let us designate xpos,ypos,xsize,ysize - values passed
  68.     in ebx,ecx. The coordinates are resulted concerning
  69.     the left upper corner of the window, which, thus, is set as (0,0),
  70.     coordinates of the right lower corner essence (xsize,ysize).
  71.   * The sizes of the window are understood in sence of coordinates
  72.     of the right lower corner. This concerns all other functions too.
  73.     It means, that the real sizes are on 1 pixel more.
  74.   * The window of type I looks as follows:
  75.     * draw external frame of color indicated in edi, 1 pixel in width
  76.     * draw header - rectangle with the left upper corner (1,1) and
  77.       right lower (xsize-1,min(25,ysize)) color indicated in esi
  78.       (taking a gradient into account)
  79.     * if ysize>=26, fill the working area of the window -
  80.       rectangle with the left upper corner (1,21) and right lower
  81.       (xsize-1,ysize-1) (sizes (xsize-1)*(ysize-21)) with color
  82.       indicated in edx (taking a gradient into account)
  83.     * if A=1 and caption has been already set by subfunction 1
  84.       of function 71, it is drawn in the corresponding place of header
  85.   * The window of style Y=1 looks as follows:
  86.     * completely defined by the application
  87.   * The window of type II looks as follows:
  88.     * draw external frame of width 1 pixel with the "shaded" color
  89.       edi (all components of the color decrease twice)
  90.     * draw intermediate frame of width 3 pixels with color edi
  91.     * draw internal frame of width 1 pixel with the "shaded" color edi
  92.     * draw header - rectangle with the left upper corner (4,4)
  93.       and right lower (xsize-4,min(20,ysize)) color, indicated in esi
  94.       (taking a gradient into account)
  95.     * if ysize>=26, fill the working area of the window -
  96.       rectangle with the left upper corner (5,20) and right lower
  97.       (xsize-5,ysize-5) with color indicated in edx
  98.       (taking a gradient into account)
  99.     * if A=1 and caption has been already set by subfunction 1
  100.       of function 71, it is drawn in the corresponding place of header
  101.   * The skinned window looks as follows:
  102.     * draw external frame of width 1 pixel
  103.       with color 'outer' from the skin
  104.     * draw intermediate frame of width 3 pixel
  105.       with color 'frame' from the skin
  106.     * draw internal frame of width 1 pixel
  107.       with color 'inner' from the skin
  108.     * draw header (on bitmaps from the skin) in a rectangle
  109.       (0,0) - (xsize,_skinh-1)
  110.     * if ysize>=26, fill the working area of the window -
  111.       rectangle with the left upper corner (5,_skinh) and right lower
  112.       (xsize-5,ysize-5) with color indicated in edx
  113.       (taking a gradient into account)
  114.     * define two standard buttons: close and minimize
  115.       (see function 8)
  116.     * if A=1 and edi contains (nonzero) pointer to caption string,
  117.       it is drawn in place in header defined in the skin
  118.     * value _skinh is accessible as the result of call
  119.       subfunction 4 of function 48
  120.  
  121. ======================================================================
  122. ================ Function 1 - put pixel in the window. ===============
  123. ======================================================================
  124. Parameters:
  125.   * eax = 1 - function number
  126.   * ebx = x-coordinate (relative to the window)
  127.   * ecx = y-coordinate (relative to the window)
  128.   * edx = 0x00RRGGBB - color of a pixel
  129.     edx = 0x01xxxxxx - invert color of a pixel
  130.           (low 24 bits are ignored)
  131. Returned value:
  132.   * function does not return value
  133.  
  134. ======================================================================
  135. ============ Function 2 - get the code of the pressed key. ===========
  136. ======================================================================
  137. Takes away the code of the pressed key from the buffer.
  138. Parameters:
  139.   * eax = 2 - function number
  140. Returned value:
  141.   * if the buffer is empty, function returns eax=1
  142.   * if the buffer is not empty, function returns al=0,
  143.     ah=code of the pressed key, high word of eax is zero
  144.   * if there is "hotkey", function returns al=2,
  145.     ah=scancode of the pressed key (0 for control keys),
  146.     high word of eax contains a status of control keys at the moment
  147.     of pressing a hotkey
  148. Remarks:
  149.   * There is a common system buffer of the pressed keys
  150.     by a size of 120 bytes, organized as queue.
  151.   * There is one more common system buffer on 120 "hotkeys".
  152.   * If the application with the inactive window calls this function,
  153.     the buffer of the pressed keys is considered to be empty.
  154.   * By default this function returns ASCII-codes; to switch
  155.     to the scancodes mode (and back) use function 66.
  156.     However, hotkeys are always notificated as scancodes.
  157.   * To find out, what keys correspond to what codes, start
  158.     the application keyascii and scancode.
  159.   * Scancodes come directly from keyboard and are fixed;
  160.     ASCII-codes turn out with usage of the conversion tables,
  161.     which can be set by subfunction 2 of function 21
  162.     and get by subfunction 2 of function 26.
  163.   * As a consequence, ASCII-codes take into account current
  164.     keyboard layout (rus/en) as opposed to scancodes.
  165.   * This function notifies only about those hotkeys, which were
  166.     defined by this thread by subfunction 4 of function 66.
  167.  
  168. ======================================================================
  169. ==================== Function 3 - get system time. ===================
  170. ======================================================================
  171. Parameters:
  172.   * eax = 3 - function number
  173. Returned value:
  174.   * eax = 0x00SSMMHH, where HH:MM:SS = Hours:Minutes:Seconds
  175.   * each item is BCD-number, for example,
  176.     for time 23:59:59 function returns 0x00595923
  177. Remarks:
  178.   * See also subfunction 9 of function 26 - get time from
  179.     the moment of start of the system; it is more convenient, because
  180.     returns simply DWORD-value of the time counter.
  181.   * System time can be set by function 22.
  182.  
  183. ======================================================================
  184. ============ Function 4 - draw text string in the window. ============
  185. ======================================================================
  186. Parameters:
  187.   * eax = 4 - function number
  188.   * ebx = [coordinate on axis x]*65536 + [coordinate on axis y]
  189.   * ecx = 0xX0RRGGBB, where
  190.     * RR, GG, BB specify text color
  191.     * X=ABnn (bits):
  192.     * nn specifies the used font: 0=system monospaced,
  193.       1=system font of variable width
  194.     * A=0 - output esi characters, A=1 - output ASCIIZ-string
  195.     * B=1 - fill background with the color edi
  196.   * edx = pointer to the beginning of the string
  197.   * esi = for A=0 length of the string, must not exceed 255;
  198.           for A=1 is ignored
  199. Returned value:
  200.   * function does not return value
  201. Remarks:
  202.   * First system font is read out at loading from the file char.mt,
  203.     second - from char2.mt.
  204.   * Both fonts have height 9 pixels, width of the monospaced font
  205.     is equal to 6 pixels.
  206.  
  207. ======================================================================
  208. ========================= Function 5 - delay. ========================
  209. ======================================================================
  210. Delays execution of the program on the given time.
  211. Parameters:
  212.   * eax = 5 - function number
  213.   * ebx = time in the 1/100 of second
  214. Returned value:
  215.   * function does not return value
  216. Remarks:
  217.   * Passing ebx=0 does not transfer control to the next process
  218.     and does not make any operations at all. If it is really required
  219.     to transfer control to the next process (to complete a current
  220.     time slice), use subfunction 1 of function 68.
  221.   * At current implementation there will be an immediate return from
  222.     the function, if the addition of ebx with current value of
  223.     time counter will call 32-bit overflow.
  224.  
  225. ======================================================================
  226. ============== Function 6 - read the file from ramdisk. ==============
  227. ======================================================================
  228. Parameters:
  229.   * eax = 6 - function number
  230.   * ebx = pointer to the filename
  231.   * ecx = number of start block, beginning from 1;
  232.     ecx=0 - read from the beginning of the file (same as ecx=1)
  233.   * edx = number of blocks to read;
  234.     edx=0 - read one block (same as edx=1)
  235.   * esi = pointer to memory area for the data
  236. Returned value:
  237.   * eax = file size in bytes, if the file was successfully read
  238.   * eax = -1, if the file was not found
  239. Remarks:
  240.   * This function is out-of-date; function 70 allows
  241.     to fulfil the same operations with the extended possibilities.
  242.   * Block = 512 bytes.
  243.   * For reading all file you can specify the certainly large value
  244.     in edx, for example, edx = -1; but in this case be ready that
  245.     the program will "fall", if the file will appear too large and can
  246.     not be placed in the program memory.
  247.   * The filename must be either in the format 8+3 characters
  248.     (first 8 characters - name itself, last 3 - extension,
  249.     the short names and extensions are supplemented with spaces),
  250.     or in the format 8.3 characters "FILE.EXT"/"FILE.EX "
  251.     (name no more than 8 characters, dot, extension 3 characters
  252.     supplemented if necessary by spaces).
  253.     The filename must be written with capital letters. The terminating
  254.     character with code 0 is not necessary (not ASCIIZ-string).
  255.   * This function does not support folders on the ramdisk.
  256.  
  257. ======================================================================
  258. =============== Function 7 - draw image in the window. ===============
  259. ======================================================================
  260. Paramters:
  261.   * eax = 7 - function number
  262.   * ebx = pointer to the image in the format BBGGRRBBGGRR...
  263.   * ecx = [size on axis x]*65536 + [size on axis y]
  264.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  265. Returned value:
  266.   * function does not return value
  267. Remarks:
  268.   * Coordinates of the image are coordinates of the upper left corner
  269.     of the image relative to the window.
  270.   * Size of the image in bytes is 3*xsize*ysize.
  271.  
  272. ======================================================================
  273. =============== Function 8 - define/delete the button. ===============
  274. ======================================================================
  275. Parameters for button definition:
  276.   * eax = 8 - function number
  277.   * ebx = [coordinate on axis x]*65536 + [size on axis x]
  278.   * ecx = [coordinate on axis y]*65536 + [size on axis y]
  279.   * edx = 0xXYnnnnnn, where:
  280.     * nnnnnn = identifier of the button
  281.     * high (31st) bit of edx is cleared
  282.     * if 30th bit of edx is set - do not draw the button
  283.     * if 29th bit of edx is set - do not draw a frame
  284.       at pressing the button
  285.   * esi = 0x00RRGGBB - color of the button
  286. Parameters for button deleting:
  287.   * eax = 8 - function number
  288.   * edx = 0x80nnnnnn, where nnnnnn - identifier of the button
  289. Returned value:
  290.   * function does not return value
  291. Remarks:
  292.   * Sizes of the button must be more than 0 and less than 0x8000.
  293.   * For skinned windows definition of the window
  294.     (call of 0th function) creates two standard buttons -
  295.     for close of the window with identifier 1 and
  296.     for minimize of the window with identifier 0xffff.
  297.   * The creation of two buttons with same identifiers is admitted.
  298.   * The button with the identifier 0xffff at pressing is interpreted
  299.     by the system as the button of minimization, the system handles
  300.     such pressing independently, not accessing to the application.
  301.     In rest it is usual button.
  302.   * Total number of buttons for all applications is limited to 4095.
  303.  
  304. ======================================================================
  305. ============ Function 9 - information on execution thread. ===========
  306. ======================================================================
  307. Parameters:
  308.   * eax = 9 - function number
  309.   * ebx = pointer to 1-Kb buffer
  310.   * ecx = number of the slot of the thread
  311.     ecx = -1 - get information on the current thread
  312. Returned value:
  313.   * eax = maximum number of the slot of a thread
  314.   * buffer pointed to by ebx contains the following information:
  315.     * +0: dword: usage of the processor (how many time units
  316.       per second leaves on execution of this thread)
  317.     * +4: word: position of the window of thread in the window stack
  318.     * +6: word: (has no relation to the specified thread)
  319.       number of the thread slot, which window has in the window stack
  320.       position ecx
  321.     * +8: word: reserved
  322.     * +10 = +0xA: 11 bytes: name of the process
  323.       (name of corresponding executable file in the format 8+3)
  324.     * +21 = +0x15: byte: reserved, this byte is not changed
  325.     * +22 = +0x16: dword: address of the process in memory
  326.     * +26 = +0x1A: dword: size of used memory - 1
  327.     * +30 = +0x1E: dword: identifier (PID/TID)
  328.     * +34 = +0x22: dword: coordinate of the thread window on axis x
  329.     * +38 = +0x26: dword: coordinate of the thread window on axis y
  330.     * +42 = +0x2A: dword: size of the thread window on axis x
  331.     * +46 = +0x2E: dword: size of the thread window on axis y
  332.     * +50 = +0x32: word: status of the thread slot:
  333.       * 0 = thread is running
  334.       * 1 = thread is suspended
  335.       * 2 = thread is suspended while waiting for event
  336.       * 3 = thread is terminating as a result of call to function -1
  337.         or under duress as a result of call to subfunction 2
  338.         of function 18 or termination of the system
  339.       * 4 = thread is terminating as a result of exception
  340.       * 5 = thread waits for event
  341.       * 9 = requested slot is free, all other information on the slot
  342.         is not meaningful
  343.     * +52 = +0x34: word: reserved, this word is not changed
  344.     * +54 = +0x36: dword: coordinate of the client area on axis x
  345.     * +58 = +0x3A: dword: coordinate of the client area on axis y
  346.     * +62 = +0x3E: dword: width of the client area
  347.     * +66 = +0x42: dword: height of the client area
  348.     * +70 = +0x46: byte: state of the window - bitfield
  349.       * bit 0 (mask 1): window is maximized
  350.       * bit 1 (mask 2): window is minimized to panel
  351.       * bit 2 (mask 4): window is rolled up
  352. Remarks:
  353.   * Slots are numbered starting from 1.
  354.   * Returned value is not a total number of threads, because there
  355.     can be free slots.
  356.   * When process is starting, system automatically creates
  357.     execution thread.
  358.   * Function gives information on the thread. Each process has
  359.     at least one thread. One process can create many threads,
  360.     in this case each thread has its own slot and the fields
  361.     +10, +22, +26 in these slots coincide.
  362.     Applications have no common way to define whether two threads
  363.     belong to one process.
  364.   * The active window - window on top of the window stack -
  365.     receives the messages on a keyboard input. For such window
  366.     the position in the window stack coincides with returned value.
  367.   * Slot 1 corresponds to special system thread, for which:
  368.     * the window is in the bottom of the window stack, the fields
  369.       +4 and +6 contain value 1
  370.     * name of the process - "OS/IDLE" (supplemented by spaces)
  371.     * address of the process in memory is 0, size of used memory is
  372.       16 Mb (0x1000000)
  373.     * PID=1
  374.     * coordinates and sizes of the window and the client area are by
  375.       convention set to 0
  376.     * status of the slot is always 0 (running)
  377.     * the execution time adds of time leaving on operations itself
  378.       and idle time in waiting for interrupt (which can be got by call
  379.       to subfunction 4 of function 18).
  380.   * Beginning from slot 2, the normal applications are placed.
  381.   * The normal applications are placed in memory at the address
  382.     0x60400000 (kernel constant 'std_application_base_address').
  383.     There is no intersection, as each process has its own page table.
  384.   * At creation of the thread it is assigned the slot
  385.     in the system table and identifier (Process/Thread IDentifier =
  386.     PID/TID), which do not vary with time for given thread.
  387.     After completion of the thread its slot can be anew used
  388.     for another thread. The thread identifier can not be assigned
  389.     to other thread even after completion of this thread.
  390.     Identifiers, assigned to new threads, grow monotonously.
  391.   * If the thread has not yet defined the window by call to
  392.     function 0, the position and the sizes
  393.     of its window are considered to be zero.
  394.   * Coordinates of the client area are relative to the window.
  395.   * At the moment only the part of the buffer by a size
  396.     71 = 0x37 bytes is used. Nevertheless it is recommended to use
  397.     1-Kb buffer for the future compatibility, in the future
  398.     some fields can be added.
  399.  
  400. ======================================================================
  401. ==================== Function 10 - wait for event. ===================
  402. ======================================================================
  403. If the message queue is empty, waits for appearance of the message
  404. in queue. In this state thread does not consume CPU time.
  405. Then reads out the message from queue.
  406.  
  407. Parameters:
  408.   * eax = 10 - function number
  409. Returned value:
  410.   * eax = event (see the list of events)
  411. Remarks:
  412.   * Those events are taken into account only which enter into
  413.     a mask set by function 40. By default it is
  414.     redraw, key and button events.
  415.   * To check, whether there is a message in queue, use function 11.
  416.     To wait for no more than given time, use function 23.
  417.  
  418. ======================================================================
  419. =============== Function 11 - check for event, no wait. ==============
  420. ======================================================================
  421. If the message queue contains event, function reads out
  422. and return it. If the queue is empty, function returns 0.
  423. Parameters:
  424.   * eax = 11 - function number
  425. Returned value:
  426.   * eax = 0 - message queue is empty
  427.   * else eax = event (see the list of events)
  428. Remarks:
  429.   * Those events are taken into account only, which enter into
  430.     a mask set by function 40. By default it is
  431.     redraw, key and button events.
  432.   * To wait for event, use function 10.
  433.     To wait for no more than given time, use function 23.
  434.  
  435. ======================================================================
  436. =============== Function 12 - begin/end window redraw. ===============
  437. ======================================================================
  438.  
  439. ---------------- Subfunction 1 - begin window redraw. ----------------
  440. Parameters:
  441.   * eax = 12 - function number
  442.   * ebx = 1 - subfunction number
  443. Returned value:
  444.   * function does not return value
  445.  
  446. ----------------- Subfunction 2 - end window redraw. -----------------
  447. Parameters:
  448.   * eax = 12 - function number
  449.   * ebx = 2 - subfunction number
  450. Returned value:
  451.   * function does not return value
  452. Remarks:
  453.   * Subfunction 1 deletes all buttons defined with
  454.     function 8, they must be defined again.
  455.  
  456. ======================================================================
  457. ============ Function 13 - draw a rectangle in the window. ===========
  458. ======================================================================
  459. Parameters:
  460.   * eax = 13 - function number
  461.   * ebx = [coordinate on axis x]*65536 + [size on axis x]
  462.   * ecx = [coordinate on axis y]*65536 + [size on axis y]
  463.   * edx = color 0xRRGGBB or 0x80RRGGBB for gradient fill
  464. Returned value:
  465.   * function does not return value
  466. Remarks:
  467.   * Coordinates are understood as coordinates of the left upper corner
  468.     of a rectangle relative to the window.
  469.  
  470. ======================================================================
  471. =================== Function 14 - get screen size. ===================
  472. ======================================================================
  473. Parameters:
  474.   * eax = 14 - function number
  475. Returned value:
  476.   * eax = [xsize]*65536 + [ysize], where
  477.   * xsize = x-coordinate of the right lower corner of the screen =
  478.             horizontal size - 1
  479.   * ysize = y-coordinate of the right lower corner of the screen =
  480.             vertical size - 1
  481. Remarks:
  482.   * See also subfunction 5 of function 48 - get sizes of
  483.     working area of the screen.
  484.  
  485. ======================================================================
  486. == Function 15, subfunction 1 - set a size of the background image. ==
  487. ======================================================================
  488. Parameters:
  489.   * eax = 15 - function number
  490.   * ebx = 1 - subfunction number
  491.   * ecx = width of the image
  492.   * edx = height of the image
  493. Returned value:
  494.   * function does not return value
  495. Remarks:
  496.   * There is no checks for correctness. The setting of too large
  497.     values will result that the background will contain data abroad
  498.     of buffer for the background image. Buffer size = 0x160000-0x10,
  499.     that corresponds to maximum size 800*600. (800*600*3=0x15F900)
  500.   * For update of the screen (after completion of a series of commands
  501.     working with a background) call subfunction 3.
  502.   * There is a pair function for get size of the background image -
  503.     subfunction 1 of function 39.
  504.  
  505. ======================================================================
  506. === Function 15, subfunction 2 - put pixel on the background image. ==
  507. ======================================================================
  508. Parameters:
  509.   * eax = 15 - function number
  510.   * ebx = 2 - subfunction number
  511.   * ecx = offset
  512.   * edx = color of a pixel 0xRRGGBB
  513. Returned value:
  514.   * function does not return value
  515. Remarks:
  516.   * Offset for a pixel with coordinates (x,y) is calculated as
  517.     (x+y*xsize)*3.
  518.   * If the given offset exceeds 0x160000-16 = 1.375 Mb - 16 bytes,
  519.     the call is ignored.
  520.   * For update of the screen (after completion of a series of commands
  521.     working with a background) call subfunction 3.
  522.   * There is a pair function for get pixel on the background image -
  523.     subfunction 2 of function 39.
  524.  
  525. ======================================================================
  526. =========== Function 15, subfunction 3 - redraw background. ==========
  527. ======================================================================
  528. Parameters:
  529.   * eax = 15 - function number
  530.   * ebx = 3 - subfunction number
  531. Returned value:
  532.   * function does not return value
  533.  
  534. ======================================================================
  535. == Function 15, subfunction 4 - set drawing mode for the background. =
  536. ======================================================================
  537. Parameters:
  538.   * eax = 15 - function number
  539.   * ebx = 4 - subfunction number
  540.   * ecx = drawing mode:
  541.     * 1 = tile
  542.     * 2 = stretch
  543. Returned value:
  544.   * function does not return value
  545. Remarks:
  546.   * For update of the screen (after completion of a series of commands
  547.     working with a background) call subfunction 3.
  548.   * There is a pair function for get drawing mode of the background -
  549.     subfunction 4 of function 39.
  550.  
  551. ======================================================================
  552. ===================== Function 15, subfunction 5 =====================
  553. ============ Put block of pixels on the background image. ============
  554. ======================================================================
  555. Parameters:
  556.   * eax = 15 - function number
  557.   * ebx = 5 - subfunction number
  558.   * ecx = pointer to the data in the format BBGGRRBBGGRR...
  559.   * edx = offset in data of the background image
  560.   * esi = size of data in bytes = 3 * number of pixels
  561. Returned value:
  562.   * function does not return value
  563. Remarks:
  564.   * If the block gets out abroad 0x160000-16 = 1.375 Mb - 16 bytes,
  565.     the call is ignored.
  566.   * Color of each pixel is stored as 3-bytes value BBGGRR.
  567.   * Pixels of the background image are written sequentially
  568.     from left to right, from up to down.
  569.   * Offset of pixel with coordinates (x,y) is (x+y*xsize)*3.
  570.   * For update of the screen (after completion of a series of commands
  571.     working with a background) call subfunction 3.
  572.  
  573. ======================================================================
  574. =============== Function 16 - save ramdisk on a floppy. ==============
  575. ======================================================================
  576. Parameters:
  577.   * eax = 16 - function number
  578.   * ebx = 1 or ebx = 2 - on which floppy save
  579. Returned value:
  580.   * eax = 0 - success
  581.   * eax = 1 - error
  582.  
  583. ======================================================================
  584. ======= Function 17 - get the identifier of the pressed button. ======
  585. ======================================================================
  586. Takes away the code of the pressed button from the buffer.
  587. Parameters:
  588.   * eax = 17 - function number
  589. Returned value:
  590.   * if the buffer is empty, function returns eax=1
  591.   * if the buffer is not empty, function returns al=0,
  592.     high 24 bits of eax contain button identifier (in particular, ah
  593.     contains low byte of the identifier; if all buttons have
  594.     the identifier less than 256, ah is enough to distinguish).
  595. Remarks:
  596.   * "Buffer" keeps only one button, at pressing the new button the
  597.     information about old is lost.
  598.   * The call of this function by an application with inactive window
  599.     will return answer "buffer is empty".
  600.  
  601. ======================================================================
  602. ============ Function 18, subfunction 1 - system shutdown. ===========
  603. ======================================================================
  604. Parameters:
  605.   * eax = 18 - function number
  606.   * ebx = 1 - subfunction number
  607. Returned value:
  608.   * function always return eax = 0 as tag of success
  609. Remarks:
  610.   * On the last step menu of exit from the system appears and waits
  611.     response of the user.
  612.   * See also subfunction 9, system shutdown with
  613.     the parameter to force the choice in the exit menu.
  614.  
  615. ======================================================================
  616. = Function 18, subfunction 2 - terminate process/thread by the slot. =
  617. ======================================================================
  618. Parameters:
  619.   * eax = 18 - function number
  620.   * ebx = 2 - subfunction number
  621.   * ecx = number of the slot of process/thread
  622. Returned value:
  623.   * function does not return value
  624. Remarks:
  625.   * It is impossible to terminate system thread OS/IDLE (with
  626.     number of the slot 1),
  627.     it is possible to terminate any normal process/thread.
  628.   * See also subfunction 18 - terminate
  629.     process/thread by the identifier.
  630.  
  631. ======================================================================
  632. ===================== Function 18, subfunction 3 =====================
  633. ============= Make active the window of the given thread. ============
  634. ======================================================================
  635. Parameters:
  636.   * eax = 18 - function number
  637.   * ebx = 3 - subfunction number
  638.   * ecx = number of the thread slot
  639. Returned value:
  640.   * function does not return value
  641. Remarks:
  642.   * If correct, but nonexistent slot is given,
  643.     some window is made active.
  644.   * To find out, which window is active, use subfunction 7.
  645.  
  646. ======================================================================
  647. ===================== Function 18, subfunction 4 =====================
  648. =========== Get counter of idle time units per one second. ===========
  649. ======================================================================
  650. Idle time units are units, in which the processor stands idle
  651. in waiting for interrupt (in the command 'hlt').
  652.  
  653. Parameters:
  654.   * eax = 18 - function number
  655.   * ebx = 4 - subfunction number
  656. Returned value:
  657.   * eax = value of the counter of idle time units per one second
  658.  
  659. ======================================================================
  660. ========== Function 18, subfunction 5 - get CPU clock rate. ==========
  661. ======================================================================
  662. Parameters:
  663.   * eax = 18 - function number
  664.   * ebx = 5 - subfunction number
  665. Returned value:
  666.   * eax = clock rate (modulo 2^32 clock ticks = 4GHz)
  667.  
  668. ======================================================================
  669.  Function 18, subfunction 6 - save ramdisk to the file on hard drive.
  670. ======================================================================
  671. Parameters:
  672.   * eax = 18 - function number
  673.   * ebx = 6 - subfunction number
  674.   * ecx defines path to the file:
  675.     * 1 = in the folder "/KOLIBRI"
  676.     * 2 = in the root folder
  677.     * 3 = edx points to the path (names of folders in the format 8+3,
  678.       divided by '/')
  679. Returned value:
  680.   * eax = 0 - success
  681.   * else eax = error code of the file system
  682. ╟рьхўрэш :
  683.   * Filename is fixed, "kolibri.img" (global kernel variable
  684.     'image_save' from 'preboot.inc')
  685.   * Drive and partition are defined by subfunction 7
  686.     and subfunction 8 of function 21.
  687.   * All folders in the given path must exist, otherwise function
  688.     returns value 5, "file not found".
  689.  
  690. ======================================================================
  691. =========== Function 18, subfunction 7 - get active window. ==========
  692. ======================================================================
  693. Parameters:
  694.   * eax = 18 - function number
  695.   * ebx = 7 - subfunction number
  696. Returned value:
  697.   * eax = number of the active window
  698.     (number of the slot of the thread with active window)
  699. Remarks:
  700.   * Active window is at the top of the window stack and receives
  701.     messages on all keyboard input.
  702.   * To make a window active, use subfunction 3.
  703.  
  704. ======================================================================
  705. == Function 18, subfunction 8 - disable/enable the internal speaker. =
  706. ======================================================================
  707. If speaker sound is disabled, all calls to subfunction 55 of
  708. function 55 are ignored. If speaker sound is enabled,
  709. they are routed on builtin speaker.
  710.  
  711. ------------------- Subsubfunction 1 - get status. -------------------
  712. Parameters:
  713.   * eax = 18 - function number
  714.   * ebx = 8 - subfunction number
  715.   * ecx = 1 - number of the subsubfunction
  716. Returned value:
  717.   * eax = 0 - speaker sound is enabled; 1 - disabled
  718.  
  719. ----------------- Subsubfunction 2 - toggle status. ------------------
  720. Toggles states of disable/enable.
  721. Parameters:
  722.   * eax = 18 - function number
  723.   * ebx = 8 - subfunction number
  724.   * ecx = 2 - number of the subsubfunction
  725. Returned value:
  726.   * function does not return value
  727.  
  728. ======================================================================
  729. == Function 18, subfunction 9 - system shutdown with the parameter. ==
  730. ======================================================================
  731. Parameters:
  732.   * eax = 18 - function number
  733.   * ebx = 9 - subfunction number
  734.   * ecx = parameter:
  735.     * 1 = on the last step of shutdown save ramdisk on a floppy and
  736.       then show the exit menu and request further operations
  737.       from the user
  738.     * 2 = turn off computer
  739.     * 3 = reboot computer
  740.     * 4 = restart the kernel from the file 'kernel.mnt' on ramdisk
  741. Returned value:
  742.   * at incorrect ecx the registers do not change (i.e. eax=18)
  743.   * by correct call function always returns eax=0
  744.     as the tag of success
  745. Remarks:
  746.   * Do not rely on returned value by incorrect call, it can be
  747.     changed in future versions of the kernel.
  748.   * It is possible to use subfunction 1, that on the last step
  749.     the user makes choice himself.
  750.   * It is not recommended to use value ecx=1 (to not irritate the user
  751.     with excessive questions); to save ramdisk on a floppy use
  752.     function 16 (which admits specification, on which floppy to
  753.     write), and to shutdown with the exit menu use already mentioned
  754.     subfunction 1.
  755.  
  756. ======================================================================
  757. ===== Function 18, subfunction 10 - minimize application window. =====
  758. ======================================================================
  759. Minimizes the own window.
  760. Parameters:
  761.   * eax = 18 - function number
  762.   * ebx = 10 - subfunction number
  763. Returned value:
  764.   * function does not return value
  765. Remarks:
  766.   * The minimized window from the point of view of function 9
  767.     keeps position and sizes.
  768.   * Restoring of an application window occurs at its activation by
  769.     subfunction 3.
  770.   * Usually there is no necessity to minimize/restire a window
  771.     obviously: minimization of a window is carried out by the system
  772.     at pressing the minimization button (for skinned windows
  773.     it is defined automatically by function 0,
  774.     for other windows it can be defined manually by function 8),
  775.     restore of a window is done by the application '@panel'.
  776.  
  777. ======================================================================
  778.  Function 18, subfunction 11 - get information on the disk subsystem.
  779. ======================================================================
  780. Parameters:
  781.   * eax = 18 - function number
  782.   * ebx = 11 - subfunction number
  783.   * ecx = type of the table:
  784.     * 1 = short version, 10 bytes
  785.     * 2 = full version, 65536 bytes
  786.   * edx = pointer to the buffer (in the application) for the table
  787. Returned value:
  788.   * function does not return value
  789. Format of the table: short version:
  790.   * +0: byte: information about FDD's (drives for floppies),
  791.     AAAABBBB, where AAAA gives type of the first drive, BBBB -
  792.     of the second regarding to the following list:
  793.     * 0 = there is no drive
  794.     * 1 = 360Kb, 5.25''
  795.     * 2 = 1.2Mb, 5.25''
  796.     * 3 = 720Kb, 3.5''
  797.     * 4 = 1.44Mb, 3.5''
  798.     * 5 = 2.88Mb, 3.5'' (such drives are not used anymore)
  799.     For example, for the standard configuration from one 1.44-drive
  800.     here will be 40h, and for the case 1.2Mb on A: and 1.44Mb on B:
  801.     the value is 24h.
  802.   * +1: byte: information about hard disks and CD-drives, AABBCCDD,
  803.     where AA corresponds to the controller IDE0, ..., DD - IDE3:
  804.     * 0 = device is absent
  805.     * 1 = hard drive
  806.     * 2 = CD-drive
  807.     For example, in the case HD on IDE0 and CD on IDE2
  808.     this field contains 48h.
  809.   * +2: 4 db: number of the retrieved partitions on hard disks
  810.     at accordingly IDE0,...,IDE3.
  811.     If the hard disk on IDEx is absent, appropriate byte is zero,
  812.     otherwise it shows number of the recognized partitions, which
  813.     can be not presented (if the drive is not formatted or if
  814.     the file system is not supported). Current version of the kernel
  815.     supports only FAT16, FAT32 and NTFS for hard disks.
  816.   * +6: 4 db: reserved
  817. Format of the table: full version:
  818.   * +0: 10 db: same as for the short version
  819.   * +10: 100 db: data for the first partition
  820.   * +110: 100 db: data for the second partition
  821.   * ...
  822.   * +10+100*(n-1): 100 db: data for the last partition
  823. The partitions are located as follows: at first sequentially all
  824. recoginzed partitions on HD on IDE0 (if present),
  825. then on HD on IDE1 (if present) and so on up to IDE3.
  826. Format of the information about partition
  827. (at moment only FAT is supported):
  828.   * +0: dword: first physical sector of the partition
  829.   * +4: dword: last physical sector of the partition
  830.     (belongs to the partition)
  831.   * +8: byte: file system type:
  832.     16=FAT16, 32=FAT32, 1=NTFS
  833.   * other data are dependent on file system, are modified with
  834.     kernel modifications and therefore are not described
  835. Remarks:
  836.   * The short table can be used for obtaining the information about
  837.     available devices.
  838.  
  839. ======================================================================
  840. ========== Function 18, subfunction 13 - get kernel version. =========
  841. ======================================================================
  842. Parameters:
  843.   * eax = 18 - function number
  844.   * ebx = 13 - subfunction number
  845.   * ecx = pointer to the buffer (not less than 16 bytes), where
  846.     the information will be placed
  847. Returned value:
  848.   * function does not return value
  849. Structure of the buffer:
  850. db a,b,c,d for version a.b.c.d
  851. db UID_xxx: one of UID_NONE=0, UID_MENUET=1, UID_KOLIBRI=2
  852. db 'name',0 - ASCIIZ-string with the name
  853. For Kolibri 0.6.4.0 kernel:
  854. db 0,6,4,0
  855. db 2
  856. db 'Kolibri',0
  857.  
  858. ======================================================================
  859. ======= Function 18, subfunction 14 - wait for screen retrace. =======
  860. ======================================================================
  861. Waits for the beginning of retrace of the scanning ray of the screen
  862. monitor.
  863. Parameters:
  864.   * eax = 18 - function number
  865.   * ebx = 14 - subfunction number
  866. Returned value:
  867.   * eax = 0 as the tag of success
  868. Remarks:
  869.   * Function is intended only for active high-efficiency graphics
  870.     applications; is used for smooth output of a graphics.
  871.  
  872. ======================================================================
  873. == Function 18, subfunction 15 - center mouse cursor on the screen. ==
  874. ======================================================================
  875. Parameters:
  876.   * eax = 18 - function number
  877.   * ebx = 15 - subfunction number
  878. Returned value:
  879.   * eax = 0 as the tag of success
  880.  
  881. ======================================================================
  882. ========= Function 18, subfunction 16 - get size of free RAM. ========
  883. ======================================================================
  884. Parameters:
  885.   * eax = 18 - function number
  886.   * ebx = 16 - subfunction number
  887. Returned value:
  888.   * eax = size of free memory in kilobytes
  889.  
  890. ======================================================================
  891. ======== Function 18, subfunction 17 - get full amount of RAM. =======
  892. ======================================================================
  893. Parameters:
  894.   * eax = 18 - function number
  895.   * ebx = 17 - subfunction number
  896. Returned value:
  897.   * eax = total size of existing memory in kilobytes
  898.  
  899. ======================================================================
  900. ===================== Function 18, subfunction 18 ====================
  901. ============= Terminate process/thread by the identifier. ============
  902. ======================================================================
  903. Parameters:
  904.   * eax = 18 - function number
  905.   * ebx = 18 - subfunction number
  906.   * ecx = identifer of process/thread (PID/TID)
  907. Returned value:
  908.   * eax = 0 - success
  909.   * eax = -1 - error (process is not found or is system)
  910. Remarks:
  911.   * It is impossible to terminate system thread OS/IDLE (identifier
  912.     1), it is possible to terminate any normal process/thread.
  913.   * See also subfunction 2 - terminate
  914.     process/thread by given slot.
  915.  
  916. ======================================================================
  917. ======== Function 18, subfunction 19 - get/set mouse features. =======
  918. ======================================================================
  919.  
  920. ---------------- Subsubfunction 0 - get mouse speed. -----------------
  921. Parameters:
  922.   * eax = 18 - function number
  923.   * ebx = 19 - subfunction number
  924.   * ecx = 0 - subsubfunction number
  925. Returned value:
  926.   * eax = current mouse speed
  927.  
  928. ---------------- Subsubfunction 1 - set mouse speed. -----------------
  929. Parameters:
  930.   * eax = 18 - function number
  931.   * ebx = 19 - subfunction number
  932.   * ecx = 1 - subsubfunction number
  933.   * edx = new value for speed
  934. Returned value:
  935.   * function does not return value
  936.  
  937. ---------------- Subsubfunction 2 - get mouse delay. -----------------
  938. Parameters:
  939.   * eax = 18 - function number
  940.   * ebx = 19 - subfunction number
  941.   * ecx = 2 - subsubfunction number
  942. Returned value:
  943.   * eax = current mouse delay
  944.  
  945. ---------------- Subsubfunction 3 - set mouse delay. -----------------
  946. Parameters:
  947.   * eax = 18 - function number
  948.   * ebx = 19 - subfunction number
  949.   * ecx = 3 - subsubfunction number
  950.   * edx = new value for mouse delay
  951. Returned value:
  952.   * function does not return value
  953.  
  954. ----------- Subsubfunction 4 - set mouse pointer position. -----------
  955. Parameters:
  956.   * eax = 18 - function number
  957.   * ebx = 19 - subfunction number
  958.   * ecx = 4 - subsubfunction number
  959.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  960. Returned value:
  961.   * function does not return value
  962. Remarks:
  963.   * It is recommended to set speed of the mouse (in subsubfunction 1)
  964.     from 1 up to 9. The installed value is not inspected by the kernel
  965.     code, so set it carefully, at incorrect value the cursor
  966.     can "freeze". Speed of the mouse can be regulated through the
  967.     application SETUP.
  968.   * Recommended delay of the mouse (in subsubfunction 3) = 10. Lower
  969.     value is not handled by COM mice. At the very large values the
  970.     movement of the mouse on 1 pixel is impossible and the cursor will
  971.     jump on the value of installed speed (subsubfunction 1). The
  972.     installed value is not inspected by the kernel code.
  973.     Mouse delay can be regulated through the application SETUP.
  974.   * The subsubfunction 4 does not check the passed value. Before
  975.     its call find out current screen resolution (with function 14)
  976.     and check that the value of position is inside the limits of the
  977.     screen.
  978.  
  979. ======================================================================
  980. ======== Function 18, subfunction 20 - get information on RAM. =======
  981. ======================================================================
  982. Parameters:
  983.   * eax = 18 - function number
  984.   * ebx = 20 - subfunction number
  985.   * ecx = pointer to the buffer for information (36 bytes)
  986. Returned value:
  987.   * eax = total size of existing RAM in pages
  988.     or -1 if error has occured
  989.   * buffer pointed to by ecx contains the following information:
  990.     * +0:  dword: total size of existing RAM in pages
  991.     * +4:  dword: size of free RAM in pages
  992.     * +8:  dword: number of page faults (exceptions #PF)
  993.                  in applications
  994.     * +12: dword: size of kernel heap in bytes
  995.     * +16: dword: free in kernel heap in bytes
  996.     * +20: dword: total number of memory blocks in kernel heap
  997.     * +24: dword: number of free memory blocks in kernel heap
  998.     * +28: dword: size of maximum free block in kernel heap
  999.                  (reserved)
  1000.     * +32: dword: size of maximum allocated block in kernel heap
  1001.                  (reserved)
  1002.  
  1003. ======================================================================
  1004. ==================== Function 20 - MIDI interface. ===================
  1005. ======================================================================
  1006.  
  1007. ----------------------- Subfunction 1 - reset ------------------------
  1008. Parameters:
  1009.   * eax = 20 - function number
  1010.   * ebx = 1 - subfunction number
  1011.  
  1012. -------------------- Subfunction 2 - output byte ---------------------
  1013. Parameters:
  1014.   * eax = 20 - function number
  1015.   * ebx = 2 - subfunction number
  1016.   * cl = byte for output
  1017. Returned value (is the same for both subfunctions):
  1018.   * eax = 0 - success
  1019.   * eax = 1 - base port is not defined
  1020. Remarks:
  1021.   * Previously the base port must be defined by
  1022.     subfunction 1 of function 21.
  1023.  
  1024. ======================================================================
  1025. ======== Function 21, subfunction 1 - set MPU MIDI base port. ========
  1026. ======================================================================
  1027. Parameters:
  1028.   * eax = 21 - function number
  1029.   * ebx = 1 - subfunction number
  1030.   * ecx = number of base port
  1031. Returned value
  1032.   * eax = 0 - success
  1033.   * eax = -1 - erratic number of a port
  1034. Remarks:
  1035.   * Number of a port must satisfy to conditions 0x100<=ecx<=0xFFFF.
  1036.   * The installation of base is necessary for function 20.
  1037.   * To get base port use subfunction 1 of function 26.
  1038.  
  1039. ======================================================================
  1040. ========== Function 21, subfunction 2 - set keyboard layout. =========
  1041. ======================================================================
  1042. Keyboard layout is used to convert keyboard scancodes to ASCII-codes,
  1043. which will be read by function 2.
  1044. Parameters:
  1045.   * eax = 21 - function number
  1046.   * ebx = 2 - subfunction number
  1047.   * ecx = which layout to set:
  1048.     * 1 = normal layout
  1049.     * 2 = layout at pressed Shift
  1050.     * 3 = layout at pressed Alt
  1051.   * edx = pointer to layout - table of length 128 bytes
  1052. Or:
  1053.   * ecx = 9
  1054.   * dx = country identifier (1=eng, 2=fi, 3=ger, 4=rus)
  1055. Returned value:
  1056.   * eax = 0 - success
  1057.   * eax = 1 - incorrect parameter
  1058. Remarks:
  1059.   * If Alt is pressed, the layout with Alt is used;
  1060.     if Alt is not pressed, but Shift is pressed,
  1061.     the layout with Shift is used;
  1062.     if Alt and Shift are not pressed, but Ctrl is pressed, the normal
  1063.     layout is used and then from the code is subtracted 0x60;
  1064.     if no control key is pressed, the normal layout is used.
  1065.   * To get layout and country identifier use
  1066.     subfunction 2 of function 26.
  1067.   * Country identifier is global system variable, which is not used
  1068.     by the kernel itself; however the application '@panel' displays
  1069.     the corresponding icon.
  1070.   * The application @panel switches layouts on user request.
  1071.  
  1072. ======================================================================
  1073. ============== Function 21, subfunction 3 - set CD base. =============
  1074. ======================================================================
  1075. Parameters:
  1076.   * eax = 21 - function number
  1077.   * ebx = 3 - subfunction number
  1078.   * ecx = CD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1079. Returned value:
  1080.   * eax = 0
  1081. Remarks:
  1082.   * CD base is used by function 24.
  1083.   * To get CD base use subfunction 3 of function 26.
  1084.  
  1085. ======================================================================
  1086. ====== Function 21, subfunction 4 - set Sound Blaster base port. =====
  1087. ======================================================================
  1088. Parameters:
  1089.   * eax = 21 - function number
  1090.   * ebx = 4 - subfunction number
  1091.   * ecx = number of the base port
  1092. Returned value:
  1093.   * eax = 0 - success
  1094.   * eax = -1 - erratic port number
  1095. Remarks:
  1096.   * Number of the port must satisfy to conditions 0x100<=ecx<=0xFFFF.
  1097.   * The installation of the base is necessary for
  1098.     functions 25, 28, 55.
  1099.   * To get base port use subfunction 4 of function 26.
  1100.  
  1101. ======================================================================
  1102. ========== Function 21, subfunction 5 - set system language. =========
  1103. ======================================================================
  1104. Parameters:
  1105.   * eax = 21 - function number
  1106.   * ebx = 5 - subfunction number
  1107.   * ecx = system language (1=eng, 2=fi, 3=ger, 4=rus)
  1108. Returned value:
  1109.   * eax = 0
  1110. Remarks:
  1111.   * System language is global system variable and is not used
  1112.     by the kernel itself, however application @panel draws the
  1113.     appropriate icon.
  1114.   * Function does not check for correctness, as the kernel does not
  1115.     use this variable.
  1116.   * To get system language use subfunction 5 of function 26.
  1117.  
  1118. ======================================================================
  1119. ============== Function 21, subfunction 7 - set HD base. =============
  1120. ======================================================================
  1121. The HD base defines hard disk to write with usage of obsolete
  1122. file system functions and functions implicitly using the hard disk
  1123. (such as subfunction 6 of function 18);
  1124. at usage of function 58 and 70 and modern syntax /HD0,/HD1,/HD2,/HD3
  1125. these function set base themselves.
  1126. Parameters:
  1127.   * eax = 21 - function number
  1128.   * ebx = 7 - subfunction number
  1129.   * ecx = HD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1130. Returned value:
  1131.   * eax = 0
  1132. Remarks:
  1133.   * Any application at any time can change the base.
  1134.   * Do not change base, when any application works with hard disk.
  1135.     If you do not want system bugs.
  1136.   * To get HD base use subfunction 7 of function 26.
  1137.   * It is also necessary to define used partition of hard disk by
  1138.     subfunction 8.
  1139.  
  1140. ======================================================================
  1141. ========= Function 21, subfunction 8 - set used HD partition. ========
  1142. ======================================================================
  1143. The HD partition defines partition of the hard disk to write with
  1144. usage of obsolete file system functions and functions implicitly
  1145. using the hard disk (such as subfunction 6 of function 18);
  1146. at usage of functions 58 and 70 and modern syntax /HD0,/HD1,/HD2,/HD3
  1147. these functions set base and partition themselves.
  1148. Parameters:
  1149.   * eax = 21 - function number
  1150.   * ebx = 8 - subfunction number
  1151.   * ecx = HD partition (beginning from 1)
  1152. Return value:
  1153.   * eax = 0
  1154. Remarks:
  1155.   * Any application at any time can change partition.
  1156.   * Do not change partition when any application works with hard disk.
  1157.     If you do not want system bugs.
  1158.   * To get used partition use subfunction 8 of function 26.
  1159.   * There is no correctness checks.
  1160.   * To get the number of partitions of a hard disk use
  1161.     subfunction 11 of function 18.
  1162.   * It is also necessary to define used HD base by subfunction 7.
  1163.  
  1164. ======================================================================
  1165. ======== Function 21, subfunction 10 - set sound DMA channel. ========
  1166. ======================================================================
  1167. Parameters:
  1168.   * eax = 21 - function number
  1169.   * ebx = 10 - subfunction number
  1170.   * ecx = number of channel (from 0 up to 3 inclusively)
  1171. Returned value:
  1172.   * eax = 0 - success
  1173.   * eax = -1 - incorrect channel number
  1174. Remarks:
  1175.   * Number of DMA channel is used in subfunction 1 of function 55.
  1176.   * To get sound DMA channel use subfunction 10 of function 26.
  1177.  
  1178. ======================================================================
  1179.  Function 21, subfunction 11 - enable/disable low-level access to HD.
  1180. ======================================================================
  1181. Parameters:
  1182.   * eax = 21 - function number
  1183.   * ebx = 11 - subfunction number
  1184.   * ecx = 0/1 - disable/enable
  1185. Returned value:
  1186.   * eax = 0
  1187. Remarks:
  1188.   * Is used in LBA-read (subfunction 8 of function 58).
  1189.   * The current implementation uses only low bit of ecx.
  1190.   * To get current status use subfunction 11 of function 26.
  1191.  
  1192. ======================================================================
  1193.  Function 21, subfunction 12 - enable/disable low-level access to PCI.
  1194. ======================================================================
  1195. Parameters:
  1196.   * eax = 21 - function number
  1197.   * ebx = 12 - subfunction number
  1198.   * ecx = 0/1 - disable/enable
  1199. Returned value:
  1200.   * eax = 0
  1201. Remarks:
  1202.   * Is used in operations with PCI bus (function 62).
  1203.   * The current implementation uses only low bit of ecx.
  1204.   * To get current status use subfunction 12 of function 26.
  1205.  
  1206. ======================================================================
  1207. ============ Function 21, subfunction 13, subsubfunction 1 ===========
  1208. ======== Initialize + get information on the driver vmode.mdr. =======
  1209. ======================================================================
  1210. Parameters:
  1211.   * eax = 21 - function number
  1212.   * ebx = 13 - subfunction number
  1213.   * ecx = 1 - number of the driver function
  1214.   * edx = pointer to 512-bytes buffer
  1215. Returned value:
  1216.   * if driver is not loaded
  1217.     (never happens in the current implementation):
  1218.     * eax = -1
  1219.     * ebx, ecx destroyed
  1220.   * if driver is loaded:
  1221.     * eax = 'MDAZ' (in fasm style, that is 'M' - low byte, 'Z' - high)
  1222.       - signature
  1223.     * ebx = current frequency of the scanning (in Hz)
  1224.     * ecx destroyed
  1225.     * buffer pointed to by edx is filled
  1226. Format of the buffer:
  1227.   * +0: 32*byte: driver name, "Trans VideoDriver"
  1228.     (without quotes, supplemented by spaces)
  1229.   * +32 = +0x20: dword: driver version (version x.y is encoded as
  1230.     y*65536+x), for the current implementation is 1 (1.0)
  1231.   * +36 = +0x24: 7*dword: reserved (0 in the current implementation)
  1232.   * +64 = +0x40: 32*word: list of supported videomodes (each word
  1233.     is number of a videomode, after list itself there are zeroes)
  1234.   * +128 = +0x80: 32*(5*word): list of supported frequences of the
  1235.     scannings for videomodes: for each videomode listed in the
  1236.     previous field up to 5 supported frequences are given
  1237.     (unused positions contain zeroes)
  1238. Remarks:
  1239.   * Function initializes the driver (if it is not initialized yet)
  1240.     and must be called first, before others (otherwise they will do
  1241.     nothing and return -1).
  1242.   * The current implementation supports only one frequency
  1243.     of the scanning on videomode.
  1244.  
  1245. ======================================================================
  1246. ============ Function 21, subfunction 13, subsubfunction 2 ===========
  1247. ================ Get information on current videomode. ===============
  1248. ======================================================================
  1249. Parameters:
  1250.   * eax = 21 - function number
  1251.   * ebx = 13 - subfunction number
  1252.   * ecx = 2 - number of the driver function
  1253. Returned value:
  1254.   * eax = -1 - driver is not loaded or not initialized;
  1255.     ebx,ecx are destroyed
  1256.   * eax = [width]*65536 + [height]
  1257.   * ebx = frequency of the vertical scanning (in Hz)
  1258.   * ecx = number of current videomode
  1259. Remarks:
  1260.   * Driver must be initialized by call to
  1261.     driver function 1.
  1262.   * If only screen sizes are required, it is more expedient to use
  1263.     function 14 taking into account that it
  1264.     returns sizes on 1 less.
  1265.  
  1266. ======================================================================
  1267. === Function 21, subfunction 13, subsubfunction 3 - set videomode. ===
  1268. ======================================================================
  1269. Parameters:
  1270.   * eax = 21 - function number
  1271.   * ebx = 13 - subfunction number
  1272.   * ecx = 3 - number of the driver function
  1273.   * edx = [scanning frequency]*65536 + [videomode number]
  1274. Returned value:
  1275.   * eax = -1 - driver is not loaded, not initialized or
  1276.     an error has occured
  1277.   * eax = 0 - success
  1278.   * ebx, ecx destroyed
  1279. Remarks:
  1280.   * Driver must be initialized by driver function 1.
  1281.   * The videomode number and frequency must be in the table
  1282.     returned by driver function 1.
  1283.  
  1284. ======================================================================
  1285. ============ Function 21, subfunction 13, subsubfunction 4 ===========
  1286. ================== Return to the initial videomode. ==================
  1287. ======================================================================
  1288. Returns the screen to the videomode set at system boot.
  1289. Parameters:
  1290.   * eax = 21 - function number
  1291.   * ebx = 13 - subfunction number
  1292.   * ecx = 4 - number of the driver function
  1293. Returned value:
  1294.   * eax = -1 - driver is not loaded or not initialized
  1295.   * eax = 0 - success
  1296.   * ebx, ecx destroyed
  1297. Remarks:
  1298.   * Driver must be initialized by call to driver function 1.
  1299.  
  1300. ======================================================================
  1301. ============ Function 21, subfunction 13, subsubfunction 5 ===========
  1302. ===== Increase/decrease the size of the visible area of monitor. =====
  1303. ======================================================================
  1304. Parameters:
  1305.   * eax = 21 - function number
  1306.   * ebx = 13 - subfunction number
  1307.   * ecx = 5 - number of the driver function
  1308.   * edx = 0/1 - decrease/increase horizontal size on 1 position
  1309.   * edx = 2/3 - is not supported in the current implementation;
  1310.     is planned as decrease/increase vertical size on 1 position
  1311. Returned value:
  1312.   * eax = -1 - driver is not loaded or not initialized
  1313.   * eax = 0 - success
  1314.   * ebx, ecx destroyed
  1315. Remarks:
  1316.   * Driver must be initialized by call to driver function 1.
  1317.   * Function influences only the physical size of the screen image;
  1318.     the logical size (number of pixels) does not change.
  1319.  
  1320. ======================================================================
  1321. ================= Function 22 - set system date/time. ================
  1322. ======================================================================
  1323. Parameters:
  1324.   * eax = 22 - function number
  1325.   * ebx = 0 - set time
  1326.     * ecx = 0x00SSMMHH - time in the binary-decimal code (BCD):
  1327.     * HH=hour 00..23
  1328.     * MM=minute 00..59
  1329.     * SS=second 00..59
  1330.   * ebx = 1 - set date
  1331.     * ecx = 0x00DDMMYY - date in the binary-decimal code (BCD):
  1332.     * DD=day 01..31
  1333.     * MM=month 01..12
  1334.     * YY=year 00..99
  1335.   * ebx = 2 - set day of week
  1336.     * ecx = 1 for Sunday, ..., 7 for Saturday
  1337.   * ebx = 3 - set alarm clock
  1338.     * ecx = 0x00SSMMHH
  1339. Returned value:
  1340.   * eax = 0 - success
  1341.   * eax = 1 - incorrect parameter
  1342.   * eax = 2 - CMOS-battery was unloaded
  1343. Remarks:
  1344.   * Value of installation of day of week seems to be doubtful,
  1345.     as it a little where is used
  1346.     (day of week can be calculated by date).
  1347.   * Alarm clock can be set on operation in the given time every day.
  1348.     But there is no existing system function to disable it.
  1349.   * Operation of alarm clock consists in generation IRQ8.
  1350.   * Generally CMOS supports for alarm clock set of value 0xFF
  1351.     as one of parameters and it means that the appropriate parameter
  1352.     is ignored. But current implementation does not allow this
  1353.     (will return 1).
  1354.   * Alarm clock is a global system resource; the set of
  1355.     an alarm clock cancels automatically the previous set.
  1356.     However, at moment no program uses it.
  1357.  
  1358. ======================================================================
  1359. ============= Function 23 - wait for event with timeout. =============
  1360. ======================================================================
  1361. If the message queue is empty, waits for new message in the queue,
  1362. but no more than given time. Then reads out a message from the queue.
  1363.  
  1364. Parameters:
  1365.   * eax = 23 - function number
  1366.   * ebx = timeout (in 1/100 of second)
  1367. Returned value:
  1368.   * eax = 0 - the message queue is empty
  1369.   * otherwise eax = event (see the list of events)
  1370. Remarks:
  1371.   * Only those events are taken into account, which enter into
  1372.     the mask set by function 40. By default it is
  1373.     redraw, key and button events.
  1374.   * To check for presence of a message in the queue use function 11.
  1375.     To wait without timeout use function 10.
  1376.   * Transmission ebx=0 results in immediate returning eax=0.
  1377.   * Current implementation returns immediately with eax=0,
  1378.     if the addition of ebx with the current value of time counter
  1379.     makes 32-bit overflow.
  1380.  
  1381. ======================================================================
  1382. ======== Function 24, subfunction 1 - begin to play CD-audio. ========
  1383. ======================================================================
  1384. Parameters:
  1385.   * eax = 24 - function number
  1386.   * ebx = 1 - subfunction number
  1387.   * ecx = 0x00FRSSMM, where
  1388.     * MM = starting minute
  1389.     * SS = starting second
  1390.     * FR = starting frame
  1391. Returned value:
  1392.   * eax = 0 - success
  1393.   * eax = 1 - CD base is not defined
  1394. Remarks:
  1395.   * Previously CD base must be defined by the call to
  1396.     subfunction 3 of function 21.
  1397.   * One second includes 75 frames, one minute includes 60 seconds.
  1398.   * The function is asynchronous (returns control, when play begins).
  1399.  
  1400. ======================================================================
  1401. ======= Function 24, subfunction 2 - get information on tracks. ======
  1402. ======================================================================
  1403. Parameters:
  1404.   * eax = 24 - function number
  1405.   * ebx = 2 - subfunction number
  1406.   * ecx = pointer to the buffer for the table
  1407.     (maximum 8*64h+4 bytes=100 tracks)
  1408. Returned value:
  1409.   * eax = 0 - success
  1410.   * eax = 1 - CD base is not defined
  1411. Remarks:
  1412.   * The format of the table with tracks information is the same as
  1413.     for ATAPI-CD command 43h (READ TOC), usual table (subcommand 00h).
  1414.     Function returns addresses in MSF.
  1415.   * Previously CD base port must be set by call to
  1416.     subfunction 3 of function 21.
  1417.   * Function returns information only about no more than 100
  1418.     first tracks. In most cases it is enough.
  1419.  
  1420. ======================================================================
  1421. ========== Function 24, subfunction 3 - stop play CD-audio. ==========
  1422. ======================================================================
  1423. Parameters:
  1424.   * eax = 24 - function number
  1425.   * ebx = 1 - subfunction number
  1426. Returned value:
  1427.   * eax = 0 - success
  1428.   * eax = 1 - CD base is not defined
  1429. ╟рьхўрэш :
  1430.   * Previously CD base port must be defined by call to
  1431.     subfunction 3 of function 21.
  1432.  
  1433. ======================================================================
  1434. =================== Function 25 - set SBPro volume. ==================
  1435. ======================================================================
  1436. Parameters:
  1437.   * eax = 25 - function number
  1438.   * ebx = what to set:
  1439.     * 1 - set common volume
  1440.     * 2 - set CD-audio volume
  1441.   * cl = volume level: high 4 bits for the left column,
  1442.     low 4 bits for the right one
  1443. Returned value:
  1444.   * eax = 0 - success
  1445.   * eax = 1 - SB base is not defined
  1446.   * eax = 2 - incorrect subfunction
  1447. Remarks:
  1448.   * Previously SB base port must be defined by
  1449.     subfunction 4 of function 21.
  1450.   * See also function 28 which sets
  1451.     volume for the later standard SB16.
  1452.  
  1453. ======================================================================
  1454. ======== Function 26, subfunction 1 - get MPU MIDI base port. ========
  1455. ======================================================================
  1456. Parameters:
  1457.   * eax = 26 - function number
  1458.   * ebx = 1 - subfunction number
  1459. Returned value:
  1460.   * eax = port number
  1461. Parameters:
  1462.   * To set base port use subfunction 1 of function 21.
  1463.  
  1464. ======================================================================
  1465. ========== Function 26, subfunction 2 - get keyboard layout. =========
  1466. ======================================================================
  1467. The keyboard layout is used to convert keyboard scancodes to
  1468. ASCII-codes for function 2.
  1469. Parameters:
  1470.   * eax = 26 - function number
  1471.   * ebx = 2 - subfunction number
  1472.   * ecx = what layout to get:
  1473.     * 1 = normal layout
  1474.     * 2 = layout with pressed Shift
  1475.     * 3 = layout with pressed Alt
  1476.   * edx = pointer to the 128-bytes buffer, where the layout will be
  1477.     copied
  1478. Returned value:
  1479.   * function does not return value
  1480. Or:
  1481.   * eax = 26 - function number
  1482.   * ebx = 2 - subfunction number
  1483.   * ecx = 9
  1484. Returned value:
  1485.   * eax = country identifier (1=eng, 2=fi, 3=ger, 4=rus)
  1486. Remarks:
  1487.   * If Alt is pressed, the layout with Alt is used;
  1488.     if Alt is not pressed, but Shift is pressed,
  1489.     the layout with Shift is used;
  1490.     if Alt and Shift are not pressed, but Ctrl is pressed, the normal
  1491.     layout is used and then from the code is subtracted 0x60;
  1492.     if no control key is pressed, the normal layout is used.
  1493.   * To set layout and country identifier use
  1494.     subfunction 2 of function 21.
  1495.   * Country identifier is global system variable, which is not used
  1496.     by the kernel itself; however the application '@panel' displays
  1497.     the corresponding icon (using this function).
  1498.   * The application @panel switches layouts on user request.
  1499.  
  1500. ======================================================================
  1501. ============== Function 26, subfunction 3 - get CD base. =============
  1502. ======================================================================
  1503. Parameters:
  1504.   * eax = 26 - function number
  1505.   * ebx = 3 - subfunction number
  1506. Returned value:
  1507.   * eax = CD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1508. Remarks:
  1509.   * CD base is used by function 24.
  1510.   * To set CD base use subfunction 3 of function 21.
  1511.  
  1512. ======================================================================
  1513. ====== Function 26, subfunction 4 - get Sound Blaster base port. =====
  1514. ======================================================================
  1515. Parameters:
  1516.   * eax = 26 - function number
  1517.   * ebx = 4 - subfunction number
  1518. Returned value:
  1519.   * eax = base port number
  1520. Remarks:
  1521.   * Bae port is used by functions 25, 55.
  1522.   * To set base port use subfunction 4 of function 21.
  1523.  
  1524. ======================================================================
  1525. ========== Function 26, subfunction 5 - get system language. =========
  1526. ======================================================================
  1527. Parameters:
  1528.   * eax = 26 - function number
  1529.   * ebx = 5 - subfunction number
  1530. Returned value:
  1531.   * eax = system language (1=eng, 2=fi, 3=ger, 4=rus)
  1532. Remarks:
  1533.   * System language is global system variable and is not used
  1534.     by the kernel itself, however application @panel draws the
  1535.     appropriate icon (using this function).
  1536.   * To set system language use subfunction 5 of function 21.
  1537.  
  1538. ======================================================================
  1539. ============== Function 26, subfunction 7 - get HD base. =============
  1540. ======================================================================
  1541. The HD base defines hard disk to write with usage of obsolete
  1542. file system functions and functions implicitly using the hard disk
  1543. (such as subfunction 6 of function 18);
  1544. at usage of function 58 and 70 and modern syntax /HD0,/HD1,/HD2,/HD3
  1545. these function set base themselves.
  1546. Parameters:
  1547.   * eax = 26 - function number
  1548.   * ebx = 7 - subfunction number
  1549. Returned value:
  1550.   * eax = HD base: 1=IDE0, 2=IDE1, 3=IDE2, 4=IDE3
  1551. Remarks:
  1552.   * Any application in any time can change HD base.
  1553.   * To set base use subfunction 7 of function 21.
  1554.   * To get used partition of hard disk use subfunction 8.
  1555.  
  1556. ======================================================================
  1557. ========= Function 26, subfunction 8 - get used HD partition. ========
  1558. ======================================================================
  1559. The HD partition defines partition of the hard disk to write with
  1560. usage of obsolete file system functions and functions implicitly
  1561. using the hard disk (such as subfunction 6 of function 18);
  1562. at usage of functions 58 and 70 and modern syntax /HD0,/HD1,/HD2,/HD3
  1563. these functions set base and partition themselves.
  1564. Parameters:
  1565.   * eax = 26 - function number
  1566.   * ebx = 8 - subfunction number
  1567. Returned value:
  1568.   * eax = HD partition (beginning from 1)
  1569. Remarks:
  1570.   * Any application in any time can change partition.
  1571.   * To set partition use subfunction 8 of function 21.
  1572.   * To get number of partitions on a hard disk use
  1573.     subfunction 11 of function 18.
  1574.   * To get base of used hard disk, use subfunction 7.
  1575.  
  1576. ======================================================================
  1577. === Function 26, subfunction 9 - get the value of the time counter. ==
  1578. ======================================================================
  1579. Parameters:
  1580.   * eax = 26 - function number
  1581.   * ebx = 9 - subfunction number
  1582. Returned value:
  1583.   * eax = number of 1/100s of second, past from the system boot time
  1584. Remarks:
  1585.   * Counter takes modulo 2^32, that correspond to a little more
  1586.     than 497 days.
  1587.   * To get system time use function 3.
  1588.  
  1589. ======================================================================
  1590. ======== Function 26, subfunction 10 - get sound DMA channel. ========
  1591. ======================================================================
  1592. Parameters:
  1593.   * eax = 26 - function number
  1594.   * ebx = 10 - subfunction number
  1595. Returned value:
  1596.   * eax = number of the channel (from 0 to 3 inclusive)
  1597. Remarks:
  1598.   * Number of the DMA channel is used by subfunction 1 of function 55.
  1599.   * To set the sound DMA channel use subfunction 10 of function 21.
  1600.  
  1601. ======================================================================
  1602. ===================== Function 26, subfunction 11 ====================
  1603. ========== Find out whether low-level HD access is enabled. ==========
  1604. ======================================================================
  1605. Parameters:
  1606.   * eax = 26 - function number
  1607.   * ebx = 11 - subfunction number
  1608. Returned value:
  1609.   * eax = 0/1 - disabled/enabled
  1610. Remarks:
  1611.   * Is used in LBA read (subfunction 8 of function 58).
  1612.   * To set current state use subfunction 11 of function 21.
  1613.  
  1614. ======================================================================
  1615. ===================== Function 26, subfunction 12 ====================
  1616. ========== Find out whether low-level PCI access is enabled. =========
  1617. ======================================================================
  1618. Parameters:
  1619.   * eax = 26 - function number
  1620.   * ebx = 12 - subfunction number
  1621. Returned value:
  1622.   * eax = 0/1 - disabled/enabled
  1623. Remarks:
  1624.   * Is used by operations with PCI bus (function 62).
  1625.   * The current implementation uses only low bit of ecx.
  1626.   * To set the current state use subfunction 12 of function 21.
  1627.  
  1628. ======================================================================
  1629. =================== Function 28 - set SB16 volume. ===================
  1630. ======================================================================
  1631. Parameters:
  1632.   * eax = 28 - function number
  1633.   * ebx = what to install:
  1634.     * 1 - install common volume
  1635.     * 2 - install CD-audio volume
  1636.   * cl = volume level (0=off, 0xFF=max)
  1637. Returned value:
  1638.   * eax = 0 - success
  1639.   * eax = 1 - SB base is not defined
  1640.   * eax = 2 - incorrect subfunction
  1641. Remarks:
  1642.   * Previously SB base port must be defined by
  1643.     subfunction 4 of function 21.
  1644.   * This function gives more variants for volume, that function 25.
  1645.  
  1646. ======================================================================
  1647. =================== Function 29 - get system date. ===================
  1648. ======================================================================
  1649. Parameters:
  1650.   * eax = 29 - function number
  1651. Returned value:
  1652.   * eax = 0x00DDMMYY, where
  1653.     (binary-decimal coding, BCD, is used)
  1654.   * YY = two low digits of year (00..99)
  1655.   * MM = month (01..12)
  1656.   * DD = day (01..31)
  1657. Remarks:
  1658.   * To set system date use function 22.
  1659.  
  1660. ======================================================================
  1661. =============== Function 32 - delete file from ramdisk. ==============
  1662. ======================================================================
  1663. Parameters:
  1664.   * eax = 32 - function number
  1665.   * ebx = pointer to the filename
  1666. Returned value:
  1667.   * eax = 0 - success; otherwise file system error code
  1668. Remarks:
  1669.   * This function is obsolete; function 58 allows to fulfill
  1670.     the same operations with the extended possibilities.
  1671.   * The current implementation returns only values 0(success) and
  1672.     5(file not found).
  1673.   * The filename must be either in the format 8+3 characters
  1674.     (first 8 characters - name itself, last 3 - extension,
  1675.     the short names and extensions are supplemented with spaces),
  1676.     or in the format 8.3 characters "FILE.EXT"/"FILE.EX "
  1677.     (name no more than 8 characters, dot, extension 3 characters
  1678.     supplemented if necessary by spaces).
  1679.     The filename must be written with capital letters. The terminating
  1680.     character with code 0 is not necessary (not ASCIIZ-string).
  1681.   * This function does not support folders on the ramdisk.
  1682.  
  1683. ======================================================================
  1684. ================ Function 33 - write file to ramdisk. ================
  1685. ======================================================================
  1686. Parameters:
  1687.   * eax = 33 - function number
  1688.   * ebx = pointer to the filename
  1689.   * ecx = pointer to data for writing
  1690.   * edx = number of bytes for writing
  1691.   * should be set esi=0
  1692. Returned value:
  1693.   * eax = 0 - success, otherwise file system error code
  1694. Remarks:
  1695.   * This function is obsolete; function 70 allows to fulfil
  1696.     the same operations with extended possibilities.
  1697.   * If esi contains non-zero value and selected file already exists,
  1698.     one more file with the same name will be created.
  1699.   * Otherwise file will be overwritten.
  1700.   * The filename must be either in the format 8+3 characters
  1701.     (first 8 characters - name itself, last 3 - extension,
  1702.     the short names and extensions are supplemented with spaces),
  1703.     or in the format 8.3 characters "FILE.EXT"/"FILE.EX "
  1704.     (name no more than 8 characters, dot, extension 3 characters
  1705.     supplemented if necessary by spaces).
  1706.     The filename must be written with capital letters. The terminating
  1707.     character with code 0 is not necessary (not ASCIIZ-string).
  1708.   * This function does not support folders on the ramdisk.
  1709.  
  1710. ======================================================================
  1711. ======= Function 35 - read the color of a pixel on the screen. =======
  1712. ======================================================================
  1713. Parameters:
  1714.   * eax = 35
  1715.   * ebx = y*xsize+x, where
  1716.   * (x,y) = coordinates of a pixel (beginning from 0)
  1717.   * xsize = horizontal screen size
  1718. Returned value:
  1719.   * eax = color 0x00RRGGBB
  1720. Remarks:
  1721.   * To get screen sizes use function 14. Pay attention,
  1722.     that it subtracts 1 from both sizes.
  1723.   * There is also direct access (without any system calls)
  1724.     to videomemory through the selector gs. To get parameters of
  1725.     the current videomode, use function 61.
  1726.  
  1727. ======================================================================
  1728. =================== Function 37 - work with mouse. ===================
  1729. ======================================================================
  1730.  
  1731. ---------- Subfunction 0 - screen coordinates of the mouse -----------
  1732. Parameters:
  1733.   * eax = 37 - function number
  1734.   * ebx = 0 - subfunction number
  1735. Returned value:
  1736.   * eax = x*65536 + y, (x,y)=coordinates of the mouse pointer
  1737.     (beginning from 0)
  1738.  
  1739. -- Subfunction 1 - coordinates of the mouse relative to the window ---
  1740. Parameters:
  1741.   * eax = 37 - function number
  1742.   * ebx = 1 - subfunction number
  1743. Returned value:
  1744.   * eax = x*65536 + y, (x,y)=coordinates of the mouse pointer
  1745.     relative to the application window (beginning from 0)
  1746. Remarks:
  1747.   * The value is calculated by formula (x-xwnd)*65536 + (y-ywnd).
  1748.     If y>=ywnd, the low word is non-negative and contains
  1749.     relative y-coordinate, and the high word - relative x-coordinate
  1750.     (with correct sign). Otherwise the low word is negative and still
  1751.     contains relative y-coordinate, and to the high word
  1752.     1 should be added.
  1753.  
  1754. ------------ Subfunction 2 - pressed buttons of the mouse ------------
  1755. Parameters:
  1756.   * eax = 37 - function number
  1757.   * ebx = 2 - subfunction number
  1758. Returned value:
  1759.   * eax contains information on the pressed mouse buttons:
  1760.   * bit 0 is set = left button is pressed
  1761.   * bit 1 is set = right button is pressed
  1762.   * other bits are cleared
  1763.  
  1764. -------------------- Subfunction 4 - load cursor ---------------------
  1765. Parameters:
  1766.   * eax = 37 - function number
  1767.   * ebx = 4 - subfunction number
  1768.   * dx = data source:
  1769.   * dx = LOAD_FROM_FILE = 0 - data in a file
  1770.     * ecx = pointer to full path to the cursor file
  1771.     * the file must be in the format .cur, which is standard for
  1772.       MS Windows, at that of the size 32*32 pixels
  1773.   * dx = LOAD_FROM_MEM = 1 - data of file are already loaded in memory
  1774.     * ecx = pointer to data of the cursor file
  1775.     * the data format is the same as in the previous case
  1776.   * dx = LOAD_INDIRECT = 2 - data in memory
  1777.     * ecx = pointer to cursor image in the format ARGB 32*32 pixels
  1778.     * edx = 0xXXYY0002, where
  1779.       * XX = x-coordinate of cursor hotspot
  1780.       * YY = y-coordinate
  1781.       * 0 <= XX, YY <= 31
  1782. Returned value:
  1783.   * eax = 0 - failed
  1784.   * otherwise eax = cursor handle
  1785.  
  1786. --------------------- Subfunction 5 - set cursor ---------------------
  1787. Sets new cursor for the window of the current thread.
  1788. Parameters:
  1789.   * eax = 37 - function number
  1790.   * ebx = 5 - subfunction number
  1791.   * ecx = cursor handle
  1792. Returned value:
  1793.   * eax = handle of previous cursor
  1794. Remarks:
  1795.   * If the handle is incorrect, the function restores the default
  1796.     cursor (standard arrow). In particular, ecx=0 restores it.
  1797.  
  1798. ------------------- Subfunction 6 - delete cursor --------------------
  1799. Parameters:
  1800.   * eax = 37 - function number
  1801.   * ebx = 6 - subfunction number
  1802.   * ecx = cursor handle
  1803. Returned value:
  1804.   * eax destroyed
  1805. Remarks:
  1806.   * The cursor must be loaded previously by the current thread
  1807.     (with the call to subfunction 4). The function does not delete
  1808.     system cursors and cursors, loaded by another applications.
  1809.   * If the active cursor (set by subfunction 5) is deleted,
  1810.     the system restores the default cursor (standard arrow).
  1811.  
  1812. ======================================================================
  1813. ====================== Function 38 - draw line. ======================
  1814. ======================================================================
  1815. Parameters:
  1816.   * eax = 38 - function number
  1817.   * ebx = [start coordinate on axis x]*65536 +
  1818.               [end coordinate on axis x]
  1819.   * ecx = [start coordinate on axis y]*65536 +
  1820.               [end coordinate on axis y]
  1821.   * edx = 0x00RRGGBB - color
  1822.     edx = 0x01xxxxxx - draw inversed line
  1823.           (low 24 bits are ignored)
  1824. Returned value:
  1825.   * function does not return value
  1826. Remarks:
  1827.   * Coordinates are relative to the window.
  1828.   * End point is also drawn.
  1829.  
  1830. ======================================================================
  1831. == Function 39, subfunction 1 - get a size of the background image. ==
  1832. ======================================================================
  1833. Parameters:
  1834.   * eax = 39 - function number
  1835.   * ebx = 1 - subfunction number
  1836. Returned value:
  1837.   * eax = [width]*65536 + [height]
  1838. Remarks:
  1839.   * There is a pair function to set sizes of background image -
  1840.     subfunction 1 of function 15. After which it is necessary,
  1841.     of course, anew to define image.
  1842.  
  1843. ======================================================================
  1844. == Function 39, subfunction 2 - get pixel from the background image. =
  1845. ======================================================================
  1846. Parameters:
  1847.   * eax = 39 - function number
  1848.   * ebx = 2 - subfunction number
  1849.   * ecx = offset
  1850. Returned value:
  1851.   * eax = 0x00RRGGBB - pixel color, if offset is valid
  1852.     (less than 0x160000-16)
  1853.   * eax = 2 otherwise
  1854. Remarks:
  1855.   * Do not rely on returned value for invalid offsets, it may be
  1856.     changed in future kernel versions.
  1857.   * Offset for pixel with coordinates (x,y)
  1858.     is calculated as (x+y*xsize)*3.
  1859.   * There is a pair function to set pixel on the background image -
  1860.     subfunction 2 of function 15.
  1861.  
  1862. ======================================================================
  1863. == Function 39, subfunction 4 - get drawing mode for the background. =
  1864. ======================================================================
  1865. Parameters:
  1866.   * eax = 39 - function number
  1867.   * ebx = 4 - subfunction number
  1868. Returned value:
  1869.   * eax = 1 - tile
  1870.   * eax = 2 - stretch
  1871. Remarks:
  1872.   * There is a pair function to set drawing mode -
  1873.     subfunction 4 of function 15.
  1874.  
  1875. ======================================================================
  1876. =========== Function 40 - set the mask for expected events. ==========
  1877. ======================================================================
  1878. The mask for expected events affects function working with events
  1879. 10, 11, 23 - they notify only about events allowed by this mask.
  1880. Parameters:
  1881.   * eax = 40 - function number
  1882.   * ebx = mask: bit i corresponds to event i+1 (see list of events)
  1883.     (set bit permits notice on event)
  1884. Returned value:
  1885.   * function does not return value
  1886. Remarks:
  1887.   * Default mask (7=111b) enables nofices about redraw,
  1888.     keys and buttons. This is enough for many applications.
  1889.   * Events prohibited in the mask are saved anyway, when come;
  1890.     they are simply not informed with event functions.
  1891.   * Event functions take into account the mask on moment of
  1892.     function call, not on moment of event arrival.
  1893.  
  1894. ======================================================================
  1895. ==================== Function 41 - get IRQ owner. ====================
  1896. ======================================================================
  1897. Parameters:
  1898.   * eax = 41 - function number
  1899.   * ebx = IRQ number, 0..15
  1900. Returned value:
  1901.   * eax = owner PID
  1902.   * eax = 0, if there is no owner
  1903.   * eax = -1 for incorrect ebx
  1904.  
  1905. ======================================================================
  1906. ==================== Function 42 - read IRQ data. ====================
  1907. ======================================================================
  1908. When an IRQ occurs, the system reads data from ports indicated
  1909. earlier by function 44 and writes this data to
  1910. internal buffer. This function reads out data from that buffer
  1911. bytewise.
  1912. Parameters:
  1913.   * eax = 42 - function number
  1914.   * ebx = IRQ number, 0..15
  1915. Returned value: (use value of ecx to distinguish)
  1916.   * if the thread is not IRQ owner (or IRQ number is incorrect):
  1917.     * ecx = 2
  1918.   * if there is no data:
  1919.     * eax = 0
  1920.     * ecx = 1
  1921.     * ebx destroyed
  1922.   * if all is ok:
  1923.     * eax = byte size of data, not yet read from buffer
  1924.     * ecx = 0
  1925.     * ebx = current byte
  1926. Remarks:
  1927.   * Previously the thread must reserve indicated IRQ for itself
  1928.     by function 45.
  1929.   * The size of data buffer is 4000 bytes, on overflow
  1930.     "fresh" data cease to be written in the buffer.
  1931.  
  1932. ======================================================================
  1933. ================ Function 43 - input/output to a port. ===============
  1934. ======================================================================
  1935.  
  1936. ------------------------ Output data to port -------------------------
  1937. Parameters:
  1938.   * eax = 43 - function number
  1939.   * bl = byte for output
  1940.   * ecx = port number 0xnnnn (from 0 to 0xFFFF)
  1941. Returned value:
  1942.   * eax = 0 - success
  1943.   * eax = 1 - the thread has not reserved the selected port
  1944.  
  1945. ------------------------ Input data from port ------------------------
  1946. Parameters:
  1947.   * eax = 43 - function number
  1948.   * ebx is ignored
  1949.   * ecx = 0x8000nnnn, where nnnn = port number (from 0 to 0xFFFF)
  1950. Returned value:
  1951.   * eax = 0 - success, thus ebx = entered byte
  1952.   * eax = 1 - the thread has not reserved the selected port
  1953. Remarks:
  1954.   * Previously the thread must reserve the selected port
  1955.     for itself by function 46.
  1956.   * Instead of call to this function it is better to use
  1957.     processor instructions in/out - this is much
  1958.     faster and a bit shorter and easier.
  1959.  
  1960. ======================================================================
  1961. =========== Function 44 - define operations at IRQ arrival. ==========
  1962. ======================================================================
  1963. At IRQ arrival the system can read the data from ports defined
  1964. by this function and write these data to internal buffer, whence
  1965. they can be read by ЇєэъЎшхщ 42.
  1966. Parameters:
  1967.   * eax = 44 - function number
  1968.   * ebx = pointer to the array of structures each describing one port:
  1969.     * +0: word: 0 means end of array, otherwise port number
  1970.     * +2: byte: reserved (ignored)
  1971.     * +3: byte: 1=read byte from this port, 2=read word
  1972.   * ecx = IRQ number, 0..15
  1973. Returned value:
  1974.   * eax = 0 - success
  1975.   * eax = 1 - the thread is not owner of selected IRQ
  1976. Remarks:
  1977.   * Previously the thread must reserve for itself selected IRQ
  1978.     by function 45.
  1979.   * First 16 ports are considered only.
  1980.   * The current implementation considers incorrect value of field +3
  1981.     as a signal to terminate IRQ processing.
  1982.  
  1983. ======================================================================
  1984. =================== Function 45 - reserve/free IRQ. ==================
  1985. ======================================================================
  1986. Parameters:
  1987.   * eax = 45 - function number
  1988.   * ebx = 0 - reserve, 1 = free
  1989.   * ecx = IRQ number, 0..15
  1990. Returned value:
  1991.   * eax = 0 - success
  1992.   * eax = 1 - error (invalid IRQ number
  1993.     or attempt to reserve not free IRQ
  1994.     or to free IRQ, not reserved by this thread)
  1995. Remarks:
  1996.   * IRQ reservation is required for functions 42 and 44.
  1997.   * Only one thread can reserve the specific IRQ.
  1998.   * IRQs, handled by the system itself, are reserved by the system
  1999.     (thread 1) at booting.
  2000.   * When a thread terminates, all reserved by it IRQs
  2001.     are freed automatically.
  2002.  
  2003. ======================================================================
  2004. ====== Function 46 - reserve/free a group of input/output ports. =====
  2005. ======================================================================
  2006. To work with reserved ports an application can access directly by
  2007. commands in/out (recommended way) and can use function 43
  2008. (not recommended way).
  2009. Parameters:
  2010.   * eax = 46 - function number
  2011.   * ebx = 0 - reserve, 1 - free
  2012.   * ecx = start port number
  2013.   * edx = end port number (inclusive)
  2014. Returned value:
  2015.   * eax = 0 - success
  2016.   * eax = 1 - error
  2017. Remarks:
  2018.   * For ports reservation: an error occurs if and only if
  2019.     one from the following condition satisfies:
  2020.     * start port is more than end port;
  2021.     * the selected range contains incorrect port number
  2022.       (correct are from 0 to 0xFFFF);
  2023.     * limit for the total number of reserved areas is exceeded
  2024.       (maximum 255 are allowed);
  2025.     * the selected range intersects with any of earlier reserved
  2026.   * For ports free: an error is an attempt to free range,
  2027.     that was not earlier reserved by this function
  2028.     (with same ecx,edx).
  2029.   * If an error occurs (for both cases) function performs no action.
  2030.   * At booting the system reserves for itself ports
  2031.     0..0x2d, 0x30..0x4d, 0x50..0xdf, 0xe5..0xff (inclusively).
  2032.   * When a thread terminates, all reserved by it ports
  2033.     are freed automatically.
  2034.  
  2035. ======================================================================
  2036. ============= Function 47 - draw a number in the window. =============
  2037. ======================================================================
  2038. Parameters:
  2039.   * eax = 47 - function number
  2040.   * ebx = parameters of conversion number to text:
  2041.     * bl = 0 - ecx contains number
  2042.     * bl = 1 - ecx contains pointer to dword-number
  2043.     * bh = 0 - display in decimal number system
  2044.     * bh = 1 - display in hexadecimal system
  2045.     * bh = 2 - display in binary system
  2046.     * сшЄ√ 16-21 = how many digits to display
  2047.     * сшЄ√ 22-31 reserved and must be set to 0
  2048.   * ecx = number (if bl=0) or pointer (if bl=1)
  2049.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  2050.   * esi = 0xX0RRGGBB:
  2051.     * RR, GG, BB specify the color
  2052.     * X = ABnn (bits)
  2053.     * nn = font (0/1)
  2054.     * A is ignored
  2055.     * B=1 - fill background with the color edi
  2056. Returned value:
  2057.   * function does not return value
  2058. Remarks:
  2059.   * The given length must not exceed 60.
  2060.   * The exactly given amount of digits is output. If number is small
  2061.     and can be written by smaller amount of digits, it is supplemented
  2062.     by leading zeroes; if the number is big and can not be written by
  2063.     given amount of digits, extra digits are not drawn.
  2064.   * Parameters of fonts are shown in the description of function 4
  2065.     (text output).
  2066.  
  2067. ======================================================================
  2068. ========= Function 48, subfunction 0 - apply screen settings. ========
  2069. ======================================================================
  2070. Parameters:
  2071.   * eax = 48 - function number
  2072.   * ebx = 0 - subfunction number
  2073.   * ecx = 0 - reserved
  2074. Returned value:
  2075.   * function does not return value
  2076. Remarks:
  2077.   * Function redraws the screen after parameters change by
  2078.     subfunctions 1 and 2.
  2079.   * Function call without prior call to one of indicated subfunctions
  2080.     is ignored.
  2081.   * Function call with nonzero ecx is ignored.
  2082.  
  2083. ======================================================================
  2084. =========== Function 48, subfunction 1 - set button style. ===========
  2085. ======================================================================
  2086. Parameters:
  2087.   * eax = 48 - function number
  2088.   * ebx = 1 - subfunction number
  2089.   * ecx = button style:
  2090.     * 0 = flat
  2091.     * 1 = 3d
  2092. Returned value:
  2093.   * function does not return value
  2094. Remarks:
  2095.   * After call to this function one should redraw the screen by
  2096.     subfunction 0.
  2097.   * Button style influences only to their draw of function 8.
  2098.  
  2099. ======================================================================
  2100. ====== Function 48, subfunction 2 - set standard window colors. ======
  2101. ======================================================================
  2102. Parameters:
  2103.   * eax = 48 - function number
  2104.   * ebx = 2 - subfunction number
  2105.   * ecx = pointer to the color table
  2106.   * edx = size of the color table
  2107.     (must be 40 bytes for future compatibility)
  2108. Format of the color table is shown in description of subfunction 3.
  2109. Returned value:
  2110.   * function does not return value
  2111. Remarks:
  2112.   * After call to this function one should redraw the screen by
  2113.     subfunction 0.
  2114.   * Table of standard colors influences only to applications,
  2115.     which receive this table obviously (by subfunction 3)
  2116.     and use it (specifying colors from it to drawing functions).
  2117.   * Table of standard colors is included in skin and is installed
  2118.     anew with skin installation (by subfunction 8).
  2119.   * Color table can be viewed/changed interactively with
  2120.     the application 'desktop'.
  2121.  
  2122. ======================================================================
  2123. ====== Function 48, subfunction 3 - get standard window colors. ======
  2124. ======================================================================
  2125. Parameters:
  2126.   * eax = 48 - function number
  2127.   * ebx = 3 - subfunction number
  2128.   * ecx = pointer to the buffer with size edx bytes,
  2129.     where table will be written
  2130.   * edx = size of color table
  2131.     (must be 40 bytes for future compatibility)
  2132. Returned value:
  2133.   * function does not return value
  2134. Format of the color table:
  2135. each item is dword-value for color 0x00RRGGBB
  2136.   * +0: dword: frames - color of frame
  2137.   * +4: dword: grab - color of header
  2138.   * +8: dword: grab_button - color of button on header bar
  2139.   * +12 = +0xC: dword: grab_button_text - color of text on button
  2140.     on header bar
  2141.   * +16 = +0x10: dword: grab_text - color of text on header
  2142.   * +20 = +0x14: dword: work - color of working area
  2143.   * +24 = +0x18: dword: work_button - color of button in working area
  2144.   * +28 = +0x1C: dword: work_button_text - color of text on button
  2145.     in working area
  2146.   * +32 = +0x20: dword: work_text - color of text in working area
  2147.   * +36 = +0x24: dword: work_graph - color of graphics in working area
  2148. Remarks:
  2149.   * Structure of the color table is described in the standard
  2150.     include file 'macros.inc' as 'system_colors'; for example,
  2151.     it is possible to write:
  2152.         sc      system_colors           ; variable declaration
  2153.         ...                             ; somewhere one must call
  2154.                                         ; this function with ecx=sc
  2155.         mov     ecx, [sc.work_button_text]      ; read text color on
  2156.                                         ; buttin in working area
  2157.   * A program itself desides to use or not to use color table.
  2158.     For usage program must simply at calls to drawing functions select
  2159.     color taken from the table.
  2160.   * At change of the table of standard colors (by subfunction 2 with
  2161.     the subsequent application of changes by subfunction 0 or
  2162.     at skin set by subfunction 8) the system sends to all windows
  2163.     redraw message (the event with code 1).
  2164.   * Color table can be viewed/changed interactively with
  2165.     the application 'desktop'.
  2166.  
  2167. ======================================================================
  2168. ============ Function 48, subfunction 4 - get skin height. ===========
  2169. ======================================================================
  2170. Parameters:
  2171.   * eax = 48 - function number
  2172.   * ebx = 4 - subfunction number
  2173. Returned value:
  2174.   * eax = skin height
  2175. Remarks:
  2176.   * Skin height is defined as the height of a header
  2177.     of skinned windows.
  2178.   * See also general structure of window in the description
  2179.     of function 0.
  2180.  
  2181. ======================================================================
  2182. ======== Function 48, subfunction 5 - get screen working area. =======
  2183. ======================================================================
  2184. Parameters:
  2185.   * eax = 48 - function number
  2186.   * ebx = 5 - subfunction number
  2187. Returned value:
  2188.   * eax = [left]*65536 + [right]
  2189.   * ebx = [top]*65536 + [bottom]
  2190. Remarks:
  2191.   * The screen working area defines position and coordinates of
  2192.     a maximized window.
  2193.   * The screen working area in view of normal work is all screen
  2194.     without system panel (the application '@panel').
  2195.   * (left,top) are coordinates of the left upper corner,
  2196.     (right,bottom) are coordinates of the right lower one.
  2197.     Thus the size of working area on x axis can be calculated by
  2198.     formula right-left+1, on y axis - by formula bottom-right+1.
  2199.   * See also function 14,
  2200.     to get sizes of all screen.
  2201.   * There is a pair function to set working area - subfunction 6.
  2202.  
  2203. ======================================================================
  2204. ======== Function 48, subfunction 6 - set screen working area. =======
  2205. ======================================================================
  2206. Parameters:
  2207.   * eax = 48 - function number
  2208.   * ebx = 6 - subfunction number
  2209.   * ecx = [left]*65536 + [right]
  2210.   * edx = [top]*65536 + [bottom]
  2211. Returned value:
  2212.   * function does not return value
  2213. Remarks:
  2214.   * The screen working area defines position and coordinates of
  2215.     a maximized window.
  2216.   * This function is used only by the application '@panel',
  2217.     which set working area to all screen without system panel.
  2218.   * (left,top) are coordinates of the left upper corner,
  2219.     (right,bottom) are coordinates of the right lower one.
  2220.     Thus the size of working area on x axis can be calculated by
  2221.     formula right-left+1, on y axis - by formula bottom-right+1.
  2222.   * If 'left'>='right', x-coordinate of working area is not changed.
  2223.     If 'left'<0, 'left' will not be set. If 'right' is greater than or
  2224.     equal to screen width, 'right' will not be set.
  2225.     Similarly on y axis.
  2226.   * See also function 14,
  2227.     to get sizes of all screen.
  2228.   * There is a pair function to get working area - subfunction 5.
  2229.   * This function redraws the screen automatically,
  2230.     updating coordinates and sizes of maximized windows.
  2231.     The system sends to all windows redraw message (the event 1).
  2232.  
  2233. ======================================================================
  2234. =========== Function 48, subfunction 7 - get skin margins. ===========
  2235. ======================================================================
  2236. Returns the area of a header of a skinned window, intended for
  2237. a text of a header.
  2238. Parameters:
  2239.   * eax = 48 - function number
  2240.   * ebx = 7 - subfunction number
  2241. Returned value:
  2242.   * eax = [left]*65536 + [right]
  2243.   * ebx = [top]*65536 + [bottom]
  2244. Remarks:
  2245.   * An application decides itself to use or not to use this function.
  2246.   * It is recommended to take into account returned value
  2247.     of this function for choice of a place for drawing header text
  2248.     (by function 4) or a substitute of header text
  2249.     (at the discretion of an application).
  2250.  
  2251. ======================================================================
  2252. ============= Function 48, subfunction 8 - set used skin. ============
  2253. ======================================================================
  2254. Parameters:
  2255.   * eax = 48 - function number
  2256.   * ebx = 8 - subfunction number
  2257.   * ecx = pointer to a block for function 58, in
  2258.     which the fields of intermediate buffer and file name are filled
  2259. Returned value:
  2260.   * eax = 0 - success
  2261.   * otherwise eax = file system error code; if file does not
  2262.     contain valid skin, function returns error 3
  2263.     (unknown file system).
  2264. Remarks:
  2265.   * After successful skin loading the system sends to all windows
  2266.     redraw message (the event 1).
  2267.   * At booting the system reads skin from file 'default.skn'
  2268.     on ramdisk.
  2269.   * User can change the skin statically by creating hisself
  2270.     'default.skn' or dynamically with the application 'desktop'.
  2271.  
  2272. ======================================================================
  2273. =========== Function 49 - Advanced Power Management (APM). ===========
  2274. ======================================================================
  2275. Parameters:
  2276.   * eax = 49 - function number
  2277.   * dx = number of the APM function
  2278.     (analogue of ax in APM specification)
  2279.   * bx, cx = parameters of the APM function
  2280. Returned value:
  2281.   * 16-bit registers ax, bx, cx, dx, si, di and carry flag CF
  2282.     are set according to the APM specification
  2283.   * high halves of 32-bit registers eax, ebx, ecx,
  2284.     edx, esi, edi are destroyed
  2285. Remarks:
  2286.   * APM 1.2 specification is described in the document
  2287.     "Advanced Power Management (APM) BIOS Specification"
  2288.     (Revision 1.2), available at
  2289.     http://www.microsoft.com/whdc/archive/amp_12.mspx;
  2290.     besides it is included in famous Interrupt List by Ralf Brown
  2291.     (http://www.pobox.com/~ralf/files.html,
  2292.     ftp://ftp.cs.cmu.edu/afs/cs/user/ralf/pub/).
  2293.  
  2294. ======================================================================
  2295. =================== Function 50 - set window shape. ==================
  2296. ======================================================================
  2297. Normal windows have rectangular shape. This function can give to
  2298. a window any shape. The shape is given by a set of points inside
  2299. the base rectangle belonging to a window. Position and coordinates
  2300. of the base rectangle are set by function 0
  2301. and changed by function 67.
  2302.  
  2303. --------------------------- Set shape data ---------------------------
  2304. Parameters:
  2305.   * eax = 50 - function number
  2306.   * ebx = 0 - subfunction number
  2307.   * ecx = pointer to shape data (array of bytes 0/1)
  2308. Returned value:
  2309.   * function does not return value
  2310.  
  2311. -------------------------- Set shape scale ---------------------------
  2312. Parameters:
  2313.   * eax = 50 - function number
  2314.   * ebx = 1 - subfunction number
  2315.   * ecx sets a scale: each byte of data defines
  2316.     (2^scale)*(2^scale) pixels
  2317. Returned value:
  2318.   * function does not return value
  2319. Remarks:
  2320.   * Default scale is 0 (scale factor is 1). If in the shape data
  2321.     one byte corresponds to one pixel, there is no necessity
  2322.     to set scale.
  2323.   * Let's designate xsize = window width (in pixels), ysize = height;
  2324.     pay attention, that they are one pixel more than defined by
  2325.     functions 0, 67.
  2326.   * On definition of scale xsize and ysize must be divisible
  2327.     on 2^scale.
  2328.   * Byte of data on offset 'a' must be 0/1 and defines belonging
  2329.     to a window of square with the side 2^scale (if scale=0,
  2330.     this is one pixel) and coordinates of the left upper corner
  2331.     (a mod (xsize shr scale), a div (xsize shr scale))
  2332.   * Data size: (xsize shr scale)*(ysize shr scale).
  2333.   * Data must be presented in the memory and not change
  2334.     after set of shape.
  2335.   * The system views the shape data at every window redraw by
  2336.     function 0.
  2337.   * The call of subfunction 0 with NULL pointer results in return
  2338.     to the rectangular shape.
  2339.  
  2340. ======================================================================
  2341. ==================== Function 51 - create thread. ====================
  2342. ======================================================================
  2343. Parameters:
  2344.   * eax = 51 - function number
  2345.   * ebx = 1 - unique subfunction
  2346.   * ecx = address of thread entry point (starting eip)
  2347.   * edx = pointer to thread stack (starting esp)
  2348. Returned value:
  2349.   * eax = -1 - error (there is too many threads)
  2350.   * otherwise eax = TID - thread identifier
  2351.     </UL>    
  2352.  
  2353. ======================================================================
  2354. === Function 52, subfunction 0 - get network driver configuration. ===
  2355. ======================================================================
  2356. Parameters:
  2357.   * eax = 52 - function number
  2358.   * ebx = 0 - subfunction number
  2359. Returned value:
  2360.   * eax = configuration dword
  2361. Remarks:
  2362.   * Configuration dword can be set by subfunction 2.
  2363.   * The kernel does not use this variable. The value of this
  2364.     variable and working with it subfunctions 0 and 2 is represented
  2365.     doubtful.
  2366.  
  2367. ======================================================================
  2368. ========= Function 52, subfunction 1 - get local IP-address. =========
  2369. ======================================================================
  2370. Parameters:
  2371.   * eax = 52 - function number
  2372.   * ebx = 1 - subfunction number
  2373. Returned value:
  2374.   * eax = IP-address (4 bytes)
  2375. Remarks:
  2376.   * Local IP-address is set by subfunction 3.
  2377.  
  2378. ======================================================================
  2379. === Function 52, subfunction 2 - set network driver configuration. ===
  2380. ======================================================================
  2381. Parameters:
  2382.   * eax = 52 - function number
  2383.   * ebx = 2 - subfunction number
  2384.   * ecx = configuration dword; if low 7 bits derivate the number 3,
  2385.     function [re-]initializes Ethernet-card, otherwise
  2386.     Ethernet turns off
  2387. Returned value:
  2388.   * if Ethernet-interface is not requested, function returns eax=2,
  2389.     but this can be changed in future kernel versions
  2390.   * if Ethernet-interface is requested, eax=0 means error
  2391.     (absence of Ethernet-card), and nonzero value - success
  2392. Remarks:
  2393.   * Configuration dword can be read by subfunction 0.
  2394.   * The kernel does not use this variable. The value of this
  2395.     variable, subfunction 0 and part of subfunction 2, which set it,
  2396.     is represented doubtful.
  2397.  
  2398. ======================================================================
  2399. ========= Function 52, subfunction 3 - set local IP-address. =========
  2400. ======================================================================
  2401. Parameters:
  2402.   * eax = 52 - function number
  2403.   * ebx = 3 - subfunction number
  2404.   * ecx = IP-address (4 bytes)
  2405. Returned value:
  2406.   * the current implementation returns eax=3, but this can be changed
  2407.     in future versions
  2408. Remarks:
  2409.   * Local IP-address can be get by subfunction 1.
  2410.  
  2411. ======================================================================
  2412. = Function 52, subfunction 6 - add data to the stack of input queue. =
  2413. ======================================================================
  2414. Parameters:
  2415.   * eax = 52 - function number
  2416.   * ebx = 6 - subfunction number
  2417.   * edx = data size
  2418.   * esi = data pointer
  2419. Returned value:
  2420.   * eax = -1 - error
  2421.   * eax = 0 - success
  2422. Remarks:
  2423.   * This function is intended only for slow network drivers
  2424.     (PPP, SLIP).
  2425.   * Data size must not exceed 1500 bytes, though function
  2426.     performs no checks on correctness.
  2427.  
  2428. ======================================================================
  2429.  Function 52, subfunction 8 - read data from the network output queue.
  2430. ======================================================================
  2431. Parameters:
  2432.   * eax = 52 - function number
  2433.   * ebx = 8 - subfunction number
  2434.   * esi = pointer to 1500-byte buffer
  2435. Returned value:
  2436.   * eax = number of read bytes (in the current implementation
  2437.     either 0 = no data or 1500)
  2438.   * data was copied in buffer
  2439. Remarks:
  2440.   * This function is intended only for slow network drivers
  2441.     (PPP, SLIP).
  2442.  
  2443. ======================================================================
  2444. ============ Function 52, subfunction 9 - get gateway IP. ============
  2445. ======================================================================
  2446. Parameters:
  2447.   * eax = 52 - function number
  2448.   * ebx = 9 - subfunction number
  2449. Returned value:
  2450.   * eax = gateway IP (4 bytes)
  2451.  
  2452. ======================================================================
  2453. =========== Function 52, subfunction 10 - get subnet mask. ===========
  2454. ======================================================================
  2455. Parameters:
  2456.   * eax = 52 - function number
  2457.   * ebx = 10 - subfunction number
  2458. Returned value:
  2459.   * eax = subnet mask
  2460.  
  2461. ======================================================================
  2462. ============ Function 52, subfunction 11 - set gateway IP. ===========
  2463. ======================================================================
  2464. Parameters:
  2465.   * eax = 52 - function number
  2466.   * ebx = 11 - subfunction number
  2467.   * ecx = gateway IP (4 bytes)
  2468. Returned value:
  2469.   * the current implementation returns eax=11, but this can be changed
  2470.     in future versions
  2471.  
  2472. ======================================================================
  2473. =========== Function 52, subfunction 12 - set subnet mask. ===========
  2474. ======================================================================
  2475. Parameters:
  2476.   * eax = 52 - function number
  2477.   * ebx = 12 - subfunction number
  2478.   * ecx = subnet mask
  2479. Returned value:
  2480.   * the current implementation returns eax=12, but this can be changed
  2481.     in future versions
  2482.  
  2483. ======================================================================
  2484. ============== Function 52, subfunction 13 - get DNS IP. =============
  2485. ======================================================================
  2486. Parameters:
  2487.   * eax = 52 - function number
  2488.   * ebx = 13 - subfunction number
  2489. Returned value:
  2490.   * eax = DNS IP (4 bytes)
  2491.  
  2492. ======================================================================
  2493. ============== Function 52, subfunction 14 - set DNS IP. =============
  2494. ======================================================================
  2495. Parameters:
  2496.   * eax = 52 - function number
  2497.   * ebx = 14 - subfunction number
  2498.   * ecx = DNS IP (4 bytes)
  2499. Returned value:
  2500.   * the current implementation returns eax=14, but this can be changed
  2501.     in future versions
  2502.  
  2503. ======================================================================
  2504. ======== Function 52, subfunction 15 - get local MAC address. ========
  2505. ======================================================================
  2506. Parameters:
  2507.   * eax = 52 - function number
  2508.   * ebx = 15 - subfunction number
  2509.   * ecx = 0 - read first 4 bytes,
  2510.     ecx = 4 - read last 2 bytes
  2511. Returned value:
  2512.   * for ecx=0: eax = first 4 bytes of MAC address
  2513.   * for ecx=4: ax = last 2 bytes of MAC address,
  2514.                high half of eax is destroyed
  2515.   * for other ecx: eax = -1 indicates an error
  2516.  
  2517. ======================================================================
  2518. ============ Function 53, subfunction 0 - open UDP-socket. ===========
  2519. ======================================================================
  2520. Parameters:
  2521.   * eax = 53 - function number
  2522.   * ebx = 0 - subfunction number
  2523.   * ecx = local port (only low word is taken into account)
  2524.   * edx = remote port (only low word is taken into account)
  2525.   * esi = remote IP
  2526. Returned value:
  2527.   * eax = -1 = 0xFFFFFFFF - error; ebx destroyed
  2528.   * eax = socket handle (some number which unambiguously identifies
  2529.     socket and have sense only for the system) - success;
  2530.     ebx destroyed
  2531.  
  2532. ======================================================================
  2533. =========== Function 53, subfunction 1 - close UDP-socket. ===========
  2534. ======================================================================
  2535. Parameters:
  2536.   * eax = 53 - function number
  2537.   * ebx = 1 - subfunction number
  2538.   * ecx = socket handle
  2539. Returned value:
  2540.   * eax = -1 - incorrect handle
  2541.   * eax = 0 - success
  2542.   * ebx destroyed
  2543. Remarks:
  2544.   * The current implementation does not close automatically all
  2545.     sockets of a thread at termination. In particular, one should not
  2546.     kill a thread with many opened sockets - there will be an outflow
  2547.     of resources.
  2548.   * The current implementation does no checks on correctness
  2549.     (function returns error only if thread tries to close not opened
  2550.     socket with correct handle).
  2551.  
  2552. ======================================================================
  2553. ============== Function 53, subfunction 2 - poll socket. =============
  2554. ======================================================================
  2555. Parameters:
  2556.   * eax = 53 - function number
  2557.   * ebx = 2 - subfunction number
  2558.   * ecx = socket handle
  2559. Returned value:
  2560.   * eax = number of read bytes
  2561.   * ebx destroyed
  2562. Remarks:
  2563.   * There is no checks for correctness.
  2564.  
  2565. ======================================================================
  2566. ========= Function 53, subfunction 3 - read byte from socket. ========
  2567. ======================================================================
  2568. Parameters:
  2569.   * eax = 53 - function number
  2570.   * ebx = 3 - subfunction number
  2571.   * ecx = socket handle
  2572. Returned value:
  2573.   * if there is no read data: eax=0, bl=0,
  2574.     other bytes of ebx are destroyed
  2575.   * if there are read data: eax=number of rest bytes
  2576.     (possibly 0), bl=read byte, other bytes of ebx are destroyed
  2577. Remarks:
  2578.   * There is no checks for correctness.
  2579.  
  2580. ======================================================================
  2581. ========== Function 53, subfunction 4 - write to UDP-socket. =========
  2582. ======================================================================
  2583. Parameters:
  2584.   * eax = 53 - function number
  2585.   * ebx = 4 - subfunction number
  2586.   * ecx = socket handle
  2587.   * edx = number of bytes to write
  2588.   * esi = pointer to data to write
  2589. Returned value:
  2590.   * eax = 0xffffffff - invalid handle
  2591.   * eax = 0xffff - not enough memory
  2592.   * eax = 0 - success
  2593.   * ebx destroyed
  2594. Remarks:
  2595.   * Check on validity of handle is minimal - only not very incorrect
  2596.     not opened handles are eliminated.
  2597.   * Number of bytes to write must not exceed 1500-28, though
  2598.     the appropriate check is not made.
  2599.  
  2600. ======================================================================
  2601. ============ Function 53, subfunction 5 - open TCP-socket. ===========
  2602. ======================================================================
  2603. Parameters:
  2604.   * eax = 53 - function number
  2605.   * ebx = 5 - subfunction number
  2606.   * ecx = local port (only low word is taken into account)
  2607.   * edx = remote port (only low word is taken into account)
  2608.   * esi = remote IP
  2609.   * edi = open mode: SOCKET_PASSIVE=0 or SOCKET_ACTIVE=1
  2610. Returned value:
  2611.   * eax = -1 = 0xFFFFFFFF - error; ebx destroys
  2612.   * eax = socket handle (some number which unambiguously identifies
  2613.     socket and have sense only for the system) - success;
  2614.     ebx destroyed
  2615.  
  2616. ======================================================================
  2617. ========= Function 53, subfunction 6 - get TCP-socket status. ========
  2618. ======================================================================
  2619. Parameters:
  2620.   * eax = 53 - function number
  2621.   * ebx = 6 - subfunction number
  2622.   * ecx = socket handle
  2623. Returned value:
  2624.   * eax = socket status: one of
  2625.   * TCB_LISTEN = 1
  2626.   * TCB_SYN_SENT = 2
  2627.   * TCB_SYN_RECEIVED = 3
  2628.   * TCB_ESTABLISHED = 4
  2629.   * TCB_FIN_WAIT_1 = 5
  2630.   * TCB_FIN_WAIT_2 = 6
  2631.   * TCB_CLOSE_WAIT = 7
  2632.   * TCB_CLOSING = 8
  2633.   * TCB_LAST_ASK = 9
  2634.   * TCB_TIME_WAIT = 10
  2635.   * TCB_CLOSED = 11
  2636.   * ebx destroys
  2637. Remarks:
  2638.   * There is no checks for correctness.
  2639.  
  2640. ======================================================================
  2641. ========== Function 53, subfunction 7 - write to TCP-socket. =========
  2642. ======================================================================
  2643. Parameters:
  2644.   * eax = 53 - function number
  2645.   * ebx = 7 - subfunction number
  2646.   * ecx = socket handle
  2647.   * edx = number of bytes to write
  2648.   * esi = pointer to data to write
  2649. Returned value:
  2650.   * eax = 0xffffffff - error
  2651.   * eax = 0xffff - not enough memory
  2652.   * eax = 0 - success
  2653.   * ebx destroyed
  2654. Remarks:
  2655.   * Check on validity of handle is minimal - only not very incorrect
  2656.     not opened handles are eliminated.
  2657.   * Number of bytes to write must not exceed 1500-40, though
  2658.     the appropriate check is not made.
  2659.  
  2660. ======================================================================
  2661. =========== Function 53, subfunction 8 - close TCP-socket. ===========
  2662. ======================================================================
  2663. Parameters:
  2664.   * eax = 53 - function number
  2665.   * ebx = 8 - subfunction number
  2666.   * ecx = socket handle
  2667. Returned value:
  2668.   * eax = -1 - invalid handle
  2669.   * eax = 0xffff - not enough memory for socket close packet
  2670.   * eax = 0 - success
  2671.   * in many cases eax is destroyed (the result of function 'queue'
  2672.     is returned) - probably this is bug, which will be corrected
  2673.   * ebx destroyed
  2674. Remarks:
  2675.   * The current implementation does not close automatically all
  2676.     sockets of a thread at termination. In particular, one should not
  2677.     kill a thread with many opened sockets - there will be an outflow
  2678.     of resources.
  2679.   * The current implementation does no checks on correctness
  2680.     (function returns error only if thread tries to close not opened
  2681.     socket with correct handle).
  2682.  
  2683. ======================================================================
  2684. === Function 53, subfunction 9 - check whether local port is free. ===
  2685. ======================================================================
  2686. Parameters:
  2687.   * eax = 53 - function number
  2688.   * ebx = 9 - subfunction number
  2689.   * ecx = local port number (low 16 bits are used only)
  2690. Returned value:
  2691.   * eax = 0 - port is used
  2692.   * eax = 1 - port is free
  2693.   * ebx destroyed
  2694.  
  2695. ======================================================================
  2696. ===== Function 53, subfunction 10 - query Ethernet cable status. =====
  2697. ======================================================================
  2698. Parameters:
  2699.   * eax = 53 - function number
  2700.   * ebx = 10 - subfunction number
  2701. Returned value:
  2702.   * al = -1 - a network driver is not loaded or
  2703.               does not support this function
  2704.   * al = 0 - Ethernet cable is unplugged
  2705.   * al = 1 - Ethernet cable is plugged
  2706. Remarks:
  2707.   * The current kernel implementation supports this function
  2708.     only for RTL8139 network cards.
  2709.  
  2710. ======================================================================
  2711. ===== Function 53, subfunction 10 - read data from stack.        =====
  2712. ======================================================================
  2713. Parameters:
  2714.   * eax = 53
  2715.   * ebx = 11
  2716.   * ecx = socket number
  2717.   * edx = pointer to where data must be written
  2718.   * esi = buffer size (max bytes of data to copy)
  2719. Returned value:
  2720.   * eax = number of bytes copied
  2721. Remarks:
  2722.   * if buffer size is zero, all data will be copied
  2723.     (this will be max 4096 bytes)
  2724.  
  2725. ======================================================================
  2726. = Function 53, subfunction 255 - debug information of network driver.
  2727. ======================================================================
  2728. Parameters:
  2729.   * eax = 53 - function number
  2730.   * ebx = 255 - subfunction number
  2731.   * ecx = type of requested information (see below)
  2732. Returned value:
  2733.   * eax = requested information
  2734.   * ebx destroyed
  2735. Possible values for ecx:
  2736.   * 100: length of queue 0 (empty queue)
  2737.   * 101: length of queue 1 (ip-out queue)
  2738.   * 102: length of queue 2 (ip-in queue)
  2739.   * 103: length of queue 3 (net1out queue)
  2740.   * 200: number of items in the ARP table
  2741.   * 201: size of the ARP table (in items) (20 for current version)
  2742.   * 202: read item at edx of the ARP table to the temporary buffer,
  2743.     whence 5 following types take information;
  2744.     in this case eax is not defined
  2745.   * 203: IP-address saved by type 202
  2746.   * 204: high dword of MAC-address saved by type 202
  2747.   * 205: low word of MAC-address saved by type 202
  2748.   * 206: status word saved by type 202
  2749.   * 207: ttl word saved by type 202
  2750.   * 2: total number of received IP-packets
  2751.   * 3: total number of transferred IP-packets
  2752.   * 4: total number of dumped received packets
  2753.   * 5: total number of received ARP-packets
  2754.   * 6: status of packet driver, 0=inactive, nonzero=active
  2755.  
  2756. ======================================================================
  2757. ========== Function 55, subfunction 0 - load data for SB16. ==========
  2758. ======================================================================
  2759. Parameters:
  2760.   * eax = 55 - function number
  2761.   * ebx = 0 - subfunction number
  2762.   * ecx = pointer to data (is copied 64 kilobytes, is used as much as
  2763.     set by subfunction 2)
  2764. Returned value:
  2765.   * function does not return value
  2766. Remarks:
  2767.   * Format and size of data are set by subfunction 2.
  2768.  
  2769. ======================================================================
  2770. ======== Function 55, subfunction 1 - begin play data on SB16. =======
  2771. ======================================================================
  2772. Parameters:
  2773.   * eax = 55 - function number
  2774.   * ebx = 1 - subfunction number
  2775. Returned value:
  2776.   * function does not return value
  2777. Remarks:
  2778.   * Previously data must be loaded by subfunction 0 and
  2779.     their format must be defined by subfunction 2.
  2780.   * Function returns control, when playing of data began; after that
  2781.     play goes independently from application (and does not use
  2782.     processor time at all).
  2783.   * Previously must be defined SB16 base port
  2784.     (by subfunction 4 of function 21) and DMA channel
  2785.     (by subfunction 10 of function 21).
  2786.  
  2787. ======================================================================
  2788. ======== Function 55, subfunction 2 - set format of SB16 data. =======
  2789. ======================================================================
  2790. Parameters:
  2791.   * eax = 55 - function number
  2792.   * ebx = 2 - subfunction number
  2793.   * ecx = 0 - set digit capacity
  2794.     * edx = 1 - 8bit mono
  2795.     * edx = 2 - 8bit stereo
  2796.   * ecx = 1 - set data size
  2797.     * edx = size in bytes
  2798.   * ecx = 2 - set play frequency
  2799.     * edx = frequency
  2800. Returned value:
  2801.   * function does not return value
  2802. Remarks:
  2803.   * When the system boots, it sets following default parameters:
  2804.     digit capacity - 8bit mono, size - 64 Kb, frequency - 44100 Hz.
  2805.     Nevertheless it is recommended to set necessary values obviously
  2806.     as they could be reset by some application.
  2807.  
  2808. ======================================================================
  2809.  Function 55, subfunction 55 - begin to play data on built-in speaker.
  2810. ======================================================================
  2811. Parameters:
  2812.   * eax = 55 - function number
  2813.   * ebx = 55 - subfunction number
  2814.   * esi = pointer to data
  2815. Returned value:
  2816.   * eax = 0 - success
  2817.   * eax = 55 - error (speaker is off or busy)
  2818. Data is an array of items with variable length.
  2819. Format of each item is defined by first byte:
  2820.   * 0 = end of data
  2821.   * 1..0x80 = sets sound duration on 1/100 of second; sound note
  2822.     is defined by immediate value of frequency
  2823.     * following word (2 bytes) contains frequency divider;
  2824.       frequency is defined as 1193180/divider
  2825.   * 0x81 = invalid
  2826.   * 0x82..0xFF = note is defined by octave and number:
  2827.     * duration in 1/100 of second = (first byte)-0x81
  2828.     * there is one more byte;
  2829.     * (second byte)=0xFF - delay
  2830.     * otherwise it looks like a*0x10+b, where b=number of the note in
  2831.       an octave from 1 to 12, a=number of octave (beginning from 0)
  2832. Remarks:
  2833.   * Speaker play can be disabled/enabled by
  2834.     subfunction 8 of function 18.
  2835.   * Function returns control, having informed the system
  2836.     an information on request. Play itself goes independently from
  2837.     the program.
  2838.   * The data must be kept in the memory at least up to the end
  2839.     of play.
  2840.  
  2841. ======================================================================
  2842. ================ Function 58 - work with file system. ================
  2843. ======================================================================
  2844. Parameters:
  2845.   * eax = 58
  2846.   * ebx = pointer to the information structure
  2847. Returned value:
  2848.   * eax = 0 - success; otherwise file system error code
  2849.   * some subfunctions return value in other registers too
  2850. General format of the information structure:
  2851.   * +0: dword: subfunction number
  2852.   * +4: dword: number of block
  2853.   * +8: dword: size
  2854.   * +12 = +0xC: dword: pointer to data
  2855.   * +16 = +0x10: dword: pointer to a memory for system operations
  2856.     (4096 bytes)
  2857.   * +20 = +0x14: n db: ASCIIZ-string with the file name
  2858. Specifications - in documentation on the appropriate subfunction.
  2859. Filename is case-insensitive for latin letters, russian letters
  2860. must be capital.
  2861. Format of filename:
  2862. /base/number/dir1/dir2/.../dirn/file,
  2863. where /base/number identifies device, on which file is located:
  2864. one of
  2865.   * /RD/1 = /RAMDISK/1 to access ramdisk
  2866.   * /FD/1 = /FLOPPYDISK/1 to access first floppy drive,
  2867.     /FD/2 = /FLOPPYDISK/2 to access second one
  2868.   * /HD/x = /HARDDISK/x - obsolete variant of access to hard disk
  2869.     (in this case base is defined by subfunction 7 of function 21),
  2870.     x - partition number (beginning from 1)
  2871.   * /HD0/x, /HD1/x, /HD2/x, /HD3/x to access accordingly to devices
  2872.     IDE0 (Primary Master), IDE1 (Primary Slave),
  2873.     IDE2 (Secondary Master), IDE3 (Secondary Slave);
  2874.     x - partition number on the selected hard drive, varies from 1
  2875.     to 255 (on each hard drive the indexing starts from 1)
  2876. Remarks:
  2877.   * In the first two cases it is also possible to use FIRST
  2878.     instead of 1, SECOND instead of 2, but it is not recommended
  2879.     for convenience of transition to the future extensions.
  2880.   * Limitation n<=39 is imposed.
  2881.   * Names of folders and file dir1,...,dirn,file must have the
  2882.     format 8.3: name no more than 8 characters, dot, extension no
  2883.     more than 3 characters. Trailing spaces are ignored, no other
  2884.     spaces is allowed. If name occupies equally 8 characters,
  2885.     dot may be omitted (though it is not recommended to use this
  2886.     feature for convenience of transition to the future extensions).
  2887.   * This function does not support folders on ramdisk.
  2888. Examples:
  2889.   * '/RAMDISK/FIRST/KERNEL.ASM',0
  2890.     '/rd/1/kernel.asm',0
  2891.   * '/HD0/1/kernel.asm',0
  2892.   * '/hd0/1/menuet/pics/tanzania.bmp',0
  2893. Existing subfunctions:
  2894.   * subfunction 0 - read file/folder
  2895.   * subfunction 1 - rewrite file
  2896.   * subfunction 8 - LBA-read from device
  2897.   * subfunction 15 - get file system information
  2898.  
  2899. ======================================================================
  2900. =========== Function 58, subfunction 0 - read file/folder. ===========
  2901. ======================================================================
  2902. Parameters:
  2903.   * eax = 58
  2904.   * ebx = pointer to the information structure
  2905. Format of the information structure:
  2906.   * +0: dword: 0 = subfunction number
  2907.   * +4: dword: first block to read (beginning from 0)
  2908.   * +8: dword: amount of blocks to read
  2909.   * +12 = +0xC: dword: pointer to buffer for data
  2910.   * +16 = +0x10: dword: pointer to buffer for system operations
  2911.     (4096 bytes)
  2912.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  2913.     given in the general description
  2914. Returned value:
  2915.   * eax = 0 - success, otherwise file system error code
  2916.   * ebx = file size (in bytes) or -1=0xffffffff, if file was not found
  2917. Remarks:
  2918.   * Block size is 512 bytes.
  2919.   * This function is obsolete, for reading files use subfunction 0
  2920.     of function 70, for reading folders - subfunction 1 of
  2921.     function 70.
  2922.   * Function can read contents of a folder. Only FAT file system is
  2923.     supported. The format of FAT-folder is described
  2924.     in any FAT documentation.
  2925.   * Size of a folder is determined by size of FAT clusters chain.
  2926.   * If file was ended before last requested block was read,
  2927.     the function will read as many as it can, and after that return
  2928.     eax=6 (EOF).
  2929.   * Function can read root folders /rd/1,/fd/x,/hd[n]/x, but
  2930.     in the first two cases the current implementation does not follow
  2931.     to the declared rules:
  2932.     for /rd/1:
  2933.     * if one want to read 0 blocks, function considers,
  2934.       that he requested 1;
  2935.     * if one requests more than 14 blocks or starting block is
  2936.       not less than 14, function returns eax=5 (not found) ш ebx=-1;
  2937.     * size of ramdisk root folder is 14 blocks,
  2938.       0x1C00=7168 срщЄ; but function returns ebx=0
  2939.       (except of the case of previous item);
  2940.     * strangely enough, it is possible to read 14th block (which
  2941.       generally contains a garbage - I remind, the indexing begins
  2942.       from 0);
  2943.     * if some block with the number not less than 14 was requested,
  2944.       function returns eax=6(EOF); otherwise eax=0.
  2945.     For /fd/x:
  2946.     * if the start block is not less than 14, function returns
  2947.       eax=5 (not found) and ebx=0;
  2948.     * note that format of FAT12 allows floppies with the root size
  2949.       more or less than 14 blocks;
  2950.     * check for length is not performed;
  2951.     * if data was successful read, function returns
  2952.       eax=0,ebx=0; otherwise eax=10 (access denied), ebx=-1.
  2953.   * The function handles reading of special folders /,/rd,/fd,/hd[n];
  2954.     but the result does not correspond to expected (on operations with
  2955.     normal files/folders), does not follow the declared rules,
  2956.     may be changed in future versions of the kernel and consequently
  2957.     is not described. To obtain the information about the equipment
  2958.     use subfunction 11 of function 18 or
  2959.     read corresponding folder with subfunction 1 of function 70.
  2960.  
  2961. ======================================================================
  2962. ============= Function 58, subfunction 1 - rewrite file. =============
  2963. ======================================================================
  2964. If the file does not exist, it is created.
  2965. If the file exists, it is rewritten.
  2966. Parameters:
  2967.   * eax = 58 - function number
  2968.   * ebx = pointer to the information structure
  2969. Format of the information structure:
  2970.   * +0: dword: 1 = subfunction number
  2971.   * +4: dword: ignored (set to 0)
  2972.   * +8: dword: number of bytes to write
  2973.   * +12 = +0xC: dword: pointer to data to write
  2974.   * +16 = +0x10: dword: pointer to buffer for system operations
  2975.     (4096 bytes)
  2976.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  2977.     given in the general description
  2978. Returned value:
  2979.   * eax = 0 - success, otherwise file system error code
  2980.   * ebx destroyed
  2981. Remarks:
  2982.   * This function is obsolete, use subfunction 2 of function 70.
  2983.  
  2984. ======================================================================
  2985. ========= Function 58, subfunction 8 - LBA-read from device. =========
  2986. ======================================================================
  2987. Parameters:
  2988.   * eax = 58 - function number
  2989.   * ebx = pointer to the information structure
  2990. Format of the information structure:
  2991.   * +0: dword: 8 = subfunction number
  2992.   * +4: dword: number of block to read (beginning from 0)
  2993.   * +8: dword: ignored (set to 1)
  2994.   * +12 = +0xC: dword: pointer to buffer for data (512 bytes)
  2995.   * +16 = +0x10: dword: pointer to buffer for system operations
  2996.     (4096 bytes)
  2997.   * +20 = +0x14: ASCIIZ-name of device: case-insensitive, one of
  2998.     /rd/1 = /RamDisk/1, /hd/n = /HardDisk/n,
  2999.     1<=n<=4 - number of device: 1=IDE0, ..., 4=IDE3.
  3000.     Instead of digits it is allowed, though not recommended for
  3001.     convenience of transition to future extensions, to use
  3002.     'first','second','third','fourth'.
  3003. Returned value:
  3004.   * for device name /hd/xxx, where xxx is not in the list above:
  3005.     * eax = ebx = 1
  3006.   * for invalid device name (except for the previous case):
  3007.     * eax = 5
  3008.     * ebx does not change
  3009.   * if LBA-access is disabled by subfunction 11 of function 21:
  3010.     * eax = 2
  3011.     * ebx destroyed
  3012.   * for ramdisk: attempt to read block outside ramdisk
  3013.     (18*2*80 blocks) results in
  3014.     * eax = 3
  3015.     * ebx = 0
  3016.   * for successful read:
  3017.     * eax = ebx = 0
  3018. Remarks:
  3019.   * Block size is 512 bytes; function reads one block.
  3020.   * Do not depend on returned value, it can be changed
  3021.     in future versions.
  3022.   * Function requires that LBA-access to devices is enabled by
  3023.     subfunction 11 of function 21. To check this one can use
  3024.     subfunction 11 of function 26.
  3025.   * LBA-read of floppy is not supported.
  3026.   * Function reads data on physical hard drive; if for any reason
  3027.     data of the concrete partition are required, application must
  3028.     define starting sector of this partition (either directly
  3029.     through MBR, or from the full structure returned by
  3030.     яюфЇєэъЎшхщ 11 ЇєэъЎшш 18).
  3031.   * Function does not check error code of hard disk, so request of
  3032.     nonexisting sector reads something (most probably it will be
  3033.     zeroes, but this is defined by device) and this is considered
  3034.     as success (eax=0).
  3035.  
  3036. ======================================================================
  3037. ==== Function 58, subfunction 15 - get information on file system. ===
  3038. ======================================================================
  3039. Parameters:
  3040.   * eax = 58 - function number
  3041.   * ebx = pointer to the information structure
  3042. Format of the information structure:
  3043.   * +0: dword: 15 = subfunction number
  3044.   * +4: dword: ignored
  3045.   * +8: dword: ignored
  3046.   * +12 = +0xC: dword: ignored
  3047.   * +16 = +0x10: dword: ignored
  3048.   * +20 = +0x14: (only second character is checked)
  3049.     /rd=/RAMDISK or /hd=/HARDDISK
  3050. Returned value:
  3051.   * if the second character does not belong to set {'r','R','h','H'}:
  3052.     * eax = 3
  3053.     * ebx = ecx = dword [fileinfo] = 0
  3054.   * for ramdisk:
  3055.     * eax = 0 (success)
  3056.     * ebx = total number of clusters = 2847
  3057.     * ecx = number of free clusters
  3058.     * dword [fileinfo] = cluster size = 512
  3059.   * for hard disk: base and partition are defined by subfunctions
  3060.     7 and 8 of function 21:
  3061.     * eax = 0 (success)
  3062.     * ebx = total number of clusters
  3063.     * ecx = number of free clusters
  3064.     * dword [fileinfo] = cluster size (in bytes)
  3065. Remarks:
  3066.   * Be not surprised to strange layout of 4th returned parameter
  3067.     - when this code was writing, at system calls application got
  3068.     only registers eax,ebx,ecx (from pushad-structure transmitted
  3069.     as argument to the system function). Now it is corrected, so,
  3070.     probably, it is meaningful to return cluster size in edx, while
  3071.     this function is not used yet.
  3072.   * There exists also subfunction 11 of function 18,
  3073.     which returns information on file system. From the full table
  3074.     of disk subsystem it is possible to deduce cluster size (there
  3075.     it is stored in sectors) and total number of clusters
  3076.     for hard disks.
  3077.  
  3078. ======================================================================
  3079. ========== Function 60 - Inter Process Communication (IPC). ==========
  3080. ======================================================================
  3081. IPC is used for message dispatching from one process/thread to
  3082. another. Previously it is necessary to agree how to interpret
  3083. the concrete message.
  3084.  
  3085. ----------- Subfunction 1 - set the area for IPC receiving -----------
  3086. Is called by process-receiver.
  3087. Parameters:
  3088.   * eax = 60 - function number
  3089.   * ebx = 1 - subfunction number
  3090.   * ecx = pointer to the buffer
  3091.   * edx = size of the buffer
  3092. Returned value:
  3093.   * eax = 0 - always success
  3094. Format of IPC-buffer:
  3095.   * +0: dword: if nonzero, buffer is considered locked;
  3096.     lock/unlock the buffer, when you work with it and need that
  3097.     buffer data are not changed from outside (no new messages)
  3098.   * +4: dword: occupied place in the buffer (in bytes)
  3099.   * +8: first message
  3100.   * +8+n: second message
  3101.   * ...
  3102. Format of a message:
  3103.   * +0: dword: PID of sender
  3104.   * +4: dword: message length (not including this header)
  3105.   * +8: n*byte: message data
  3106.  
  3107. ------------------ Subfunction 2 - send IPC message ------------------
  3108. Is called by process-sender.
  3109. Parameters:
  3110.   * eax = 60 - function number
  3111.   * ebx = 2 - subfunction number
  3112.   * ecx = PID of receiver
  3113.   * edx = pointer to the message data
  3114.   * esi = message length (in bytes)
  3115. Returned value:
  3116.   * eax = 0 - success
  3117.   * eax = 1 - the receiver has not defined buffer for IPC messages
  3118.     (can be, still have no time,
  3119.     and can be, this is not right process)
  3120.   * eax = 2 - the receiver has blocked IPC-buffer; try to wait a bit
  3121.   * eax = 3 - overflow of IPC-buffer of the receiver
  3122.   * eax = 4 - process/thread with such PID does not exist
  3123. Remarks:
  3124.   * Immediately after writing of IPC-message to the buffer the system
  3125.     sends to the receiver the event with code 7 (see event codes).
  3126.  
  3127. ======================================================================
  3128. ==== Function 61 - get parameters for the direct graphics access. ====
  3129. ======================================================================
  3130. The data of the graphics screen (the memory area which displays
  3131. screen contents) are accessible to a program directly, without
  3132. any system calls, through the selector gs:
  3133.         mov     eax, [gs:0]
  3134. places in eax the first dword of the buffer, which contains
  3135. information on color of the left upper point (and, possibly, colors
  3136. of several following).
  3137.         mov     [gs:0], eax
  3138. by work in VESA modes with LFB sets color of the left upper point
  3139. (and, possibly, colors of several following).
  3140. To interpret the data of graphics screen program needs to know
  3141. some parameters, returning by this function.
  3142. Remarks:
  3143.   * Graphics parameters changes very seldom at work,
  3144.     namely, only in cases, when user works with the application VRR.
  3145.   * At videomode change the system redraws all windows (event
  3146.     with code 1) and redraws the background (event 5).
  3147.     Same events occur in other cases too, which meet much more often,
  3148.     than videomode change.
  3149.   * By operation in videomodes with LFB the selector gs points to
  3150.     LFB itself, so reading/writing on gs result directly in
  3151.     change of screen contents. By operation in videomodes without
  3152.     LFB gs points to some data area in the kernel, and all functions
  3153.     of screen output fulfil honesty double operation on writing
  3154.     directly to the screen and writing to this buffer. In result
  3155.     at reading contents of this buffer the results correspond to
  3156.     screen contents (with, generally speaking, large color
  3157.     resolution), and writing is ignored.
  3158.     One exception is the mode 320*200, for which main loop of the
  3159.     system thread updates the screen according to mouse movements.
  3160.  
  3161. ------------------------- Screen resolution --------------------------
  3162. Parameters:
  3163.   * eax = 61 - function number
  3164.   * ebx = 1 - subfunction number
  3165. Returned value:
  3166.   * eax = [resolution on x axis]*65536 + [resolution on y axis]
  3167. Remarks:
  3168.   * One can use function 14 paying attention that
  3169.     it returns sizes on 1 pixel less. It is fully equivalent way.
  3170.  
  3171. ---------------------- Number of bits per pixel ----------------------
  3172. Parameters:
  3173.   * eax = 61 - function number
  3174.   * ebx = 2 - subfunction number
  3175. Returned value:
  3176.   * eax = number of bits per pixel (24 or 32)
  3177.  
  3178. -------------------- Number of bytes per scanline --------------------
  3179. Parameters:
  3180.   * eax = 61 - function number
  3181.   * ebx = 3 - subfunction number
  3182. Returned value:
  3183.   * eax = number of bytes occupied by one scanline
  3184.     (horizontal line on the screen)
  3185.  
  3186. ======================================================================
  3187. ===== Function 62, subfunction 0 - get version of PCI-interface. =====
  3188. ======================================================================
  3189. Parameters:
  3190.   * eax = 62 - function number
  3191.   * bl = 0 - subfunction number
  3192. Returned value:
  3193.   * eax = -1 - PCI access is disabled; otherwise
  3194.   * ah.al = version of PCI-interface (ah=version, al=subversion)
  3195.   * high word of eax is zeroed
  3196. Remarks:
  3197.   * Previously low-level access to PCI for applications must be
  3198.     enabled by subfunction 12 of function 21.
  3199.   * If PCI BIOS is not supported, the value of ax is undefined.
  3200.  
  3201. ======================================================================
  3202. ==== Function 62, subfunction 1 - get number of the last PCI-bus. ====
  3203. ======================================================================
  3204. Parameters:
  3205.   * eax = 62 - function number
  3206.   * bl = 1 - subfunction number
  3207. Returned value:
  3208.   * eax = -1 - access to PCI is disabled; otherwise
  3209.   * al = number of the last PCI-bus; other bytes of eax are destroyed
  3210. Remarks:
  3211.   * Previously low-level access to PCI for applications must be
  3212.     enabled by subfunction 12 of function 21.
  3213.   * If PCI BIOS is not supported, the value of ax is undefined.
  3214.  
  3215. ======================================================================
  3216. ===================== Function 62, subfunction 2 =====================
  3217. ===== Get mechanism of addressing to the PCI configuration space. ====
  3218. ======================================================================
  3219. Parameters:
  3220.   * eax = 62 - function number
  3221.   * bl = 2 - subfunction number
  3222. Returned value:
  3223.   * eax = -1 - access to PCI is disabled; otherwise
  3224.   * al = mechanism (1 or 2); other bytes of eax are destroyed
  3225. Remarks:
  3226.   * Previously low-level access to PCI for applications must be
  3227.     enabled by subfunction 12 of function 21.
  3228.   * Addressing mechanism is selected depending on
  3229.     equipment characteristics.
  3230.   * Subfunctions of read and write work automatically
  3231.     with the selected mechanism.
  3232.  
  3233. ======================================================================
  3234. ======== Function 62, subfunctions 4,5,6 - read PCI-register. ========
  3235. ======================================================================
  3236. Parameters:
  3237.   * eax = 62 - function number
  3238.   * bl = 4 - read byte
  3239.   * bl = 5 - read word
  3240.   * bl = 6 - read dword
  3241.   * bh = number of PCI-bus
  3242.   * ch = dddddfff, where ddddd = number of the device on the bus,
  3243.     fff = function number of device
  3244.   * cl = number of register (must be even for bl=5,
  3245.     divisible by 4 for bl=6)
  3246. Returned value:
  3247.   * eax = -1 - error (access to PCI is disabled or parameters
  3248.     are not supported); otherwise
  3249.   * al/ax/eax (depending on requested size) contains the data;
  3250.     the other part of register eax is destroyed
  3251. Remarks:
  3252.   * Previously low-level access to PCI for applications must be
  3253.     enabled by subfunction 12 of function 21.
  3254.   * Access mechanism 2 supports only 16 devices on a bus and ignores
  3255.     function number. To get access mechanism use subfunction 2.
  3256.   * Some registers are standard and exist for all devices, some are
  3257.     defined by the concrete device. The list of registers of the
  3258.     first type can be found e.g. in famous
  3259.     Interrupt List by Ralf Brown
  3260.     (http://www.pobox.com/~ralf/files.html,
  3261.     ftp://ftp.cs.cmu.edu/afs/cs/user/ralf/pub/);
  3262.     registers of the second type must be listed
  3263.     in the device documentation.
  3264.  
  3265. ======================================================================
  3266. ====== Function 62, subfunctions 8,9,10 - write to PCI-register. =====
  3267. ======================================================================
  3268. Parameters:
  3269.   * eax = 62 - function number
  3270.   * bl = 8 - write byte
  3271.   * bl = 9 - write word
  3272.   * bl = 10 - write dword
  3273.   * bh = number of PCI-bus
  3274.   * ch = dddddfff, where ddddd = number of the device on the bus,
  3275.     fff = function number of device
  3276.   * cl = number of register (must be even for bl=9,
  3277.     divisible by 4 for bl=10)
  3278.   * dl/dx/edx (depending on requested size) contatins
  3279.     the data to write
  3280. Returned value:
  3281.   * eax = -1 - error (access to PCI is disabled or parameters
  3282.     are not supported)
  3283.   * eax = 0 - success
  3284. Remarks:
  3285.   * Previously low-level access to PCI for applications must be
  3286.     enabled by subfunction 12 of function 21.
  3287.   * Access mechanism 2 supports only 16 devices on a bus and ignores
  3288.     function number. To get access mechanism use subfunction 2.
  3289.   * Some registers are standard and exist for all devices, some are
  3290.     defined by the concrete device. The list of registers of the
  3291.     first type can be found e.g. in famous Interrupt List by
  3292.     Ralf Brown; registers of the second type must be listed
  3293.     in the device documentation.
  3294.  
  3295. ======================================================================
  3296. ============== Function 63 - work with the debug board. ==============
  3297. ======================================================================
  3298. The debug board is the global system buffer (with the size
  3299. 512 bytes), to which any program can write (generally speaking,
  3300. arbitrary) data and from which other program can read these data.
  3301. By the agreement written data are text strings interpreted as
  3302. debug messages on a course of program execution. The kernel in
  3303. some situations also writes to the debug board information on
  3304. execution of some functions; by the agreement kernel messages
  3305. begins from the prefix "K : ".
  3306. For view of the debug board the application 'board' was created,
  3307. which reads data from the buffer and displays them in its window.
  3308. 'board' interpretes the sequence of codes 13,10 as newline.
  3309. A character with null code in an end of line is not necessary,
  3310. but also does not prevent.
  3311. Because debugger has been written, the value of the debug board
  3312. has decreased, as debugger allows to inspect completely a course of
  3313. program execution without any efforts from the direction of program
  3314. itself. Nevertheless in some cases the debug board is still useful.
  3315.  
  3316. ----------------------------- Write byte -----------------------------
  3317. Parameters:
  3318.   * eax = 63 - function number
  3319.   * ebx = 1 - subfunction number
  3320.   * cl = data byte
  3321. Returned value:
  3322.   * function does not return value
  3323. Remarks:
  3324.   * Byte is written to the buffer. Buffer size is 512 bytes.
  3325.     At buffer overflow all obtained data are lost.
  3326.   * For output to the debug board of more complicated objects
  3327.     (strings, numbers) it is enough to call this function in cycle.
  3328.     It is possible not to write the appropriate code manually and use
  3329.     file 'debug.inc', which is included into the distributive.
  3330.  
  3331. ----------------------------- Read byte ------------------------------
  3332. Takes away byte from the buffer.
  3333. Parameters:
  3334.   * eax = 63 - function number
  3335.   * ebx = 2 - subfunction number
  3336. Returned value:
  3337.   * eax = ebx = 0 - the buffer is empty
  3338.   * eax = byte, ebx = 1 - byte was successfully read
  3339.  
  3340. ======================================================================
  3341. ============== Function 64 - resize application memory. ==============
  3342. ======================================================================
  3343. Parameters:
  3344.   * eax = 64 - function number
  3345.   * ebx = 1 - unique subfunction
  3346.   * ecx = new memory size
  3347. Returned value:
  3348.   * eax = 0 - success
  3349.   * eax = 1 - not enough memory
  3350. Remarks:
  3351.   * There is another way to dynamically allocate/free memory -
  3352.     subfunctions 11, 12, 13 of function 68.
  3353.   * The function cannot be used together with 68.11, 68.12, 68.13.
  3354.     The function call will be ignored after creation of process heap
  3355.     with function 68.11.
  3356.  
  3357. ======================================================================
  3358. ======== Function 65 - draw image with palette in the window. ========
  3359. ======================================================================
  3360. Parameters:
  3361.   * eax = 65 - function number
  3362.   * ebx = pointer to the image
  3363.   * ecx = [size on axis x]*65536 + [size on axis y]
  3364.   * edx = [coordinate on axis x]*65536 + [coordinate on axis y]
  3365.   * esi = number of bits per pixel, must be 8, 24 or 32
  3366.   * edi = pointer to palette (256 colors 0x00RRGGBB);
  3367.           ignored when esi = 24 and 32
  3368.   * ebp = offset of next row data relative to previous row data
  3369. Returned value:
  3370.   * function does not return value
  3371. Remarks:
  3372.   * Coordinates of the image are coordinates of the upper left corner
  3373.     of the image relative to the window.
  3374.   * Size of the image in bytes is xsize*ysize.
  3375.   * Each byte of image is index in the palette.
  3376.   * If the image uses less than 256 colors, palette size may be
  3377.     less than 256 too.
  3378.   * The call to function 7 is equivalent to call to this function
  3379.     with esi=24, ebp=0.
  3380.  
  3381. ======================================================================
  3382. ================== Function 66 - work with keyboard. =================
  3383. ======================================================================
  3384. The input mode influences results of reading keys by function 2.
  3385. When a program loads, ASCII input mode is set for it.
  3386.  
  3387. -------------- Subfunction 1 - set keyboard input mode. --------------
  3388. Parameters:
  3389.   * eax = 66 - function number
  3390.   * ebx = 1 - subfunction number
  3391.   * ecx = mode:
  3392.     * 0 = normal (ASCII-characters)
  3393.     * 1 = scancodes
  3394. Returned value:
  3395.   * function does not return value
  3396.  
  3397. -------------- Subfunction 2 - get keyboard input mode. --------------
  3398. Parameters:
  3399.   * eax = 66 - function number
  3400.   * ebx = 2 - subfunction number
  3401. Returned value:
  3402.   * eax = current mode
  3403.  
  3404. ------------ Subfunction 3 - get status of control keys. -------------
  3405. Parameters:
  3406.   * eax = 66 - function number
  3407.   * ebx = 3 - subfunction number
  3408. Returned value:
  3409.   * eax = bit mask:
  3410.   * bit 0 (mask 1): left Shift is pressed
  3411.   * bit 1 (mask 2): right Shift is pressed
  3412.   * bit 2 (mask 4): left Ctrl is pressed
  3413.   * bit 3 (mask 8): right Ctrl is pressed
  3414.   * bit 4 (mask 0x10): left Alt is pressed
  3415.   * bit 5 (mask 0x20): right Alt is pressed
  3416.   * bit 6 (mask 0x40): CapsLock is on
  3417.   * bit 7 (mask 0x80): NumLock is on
  3418.   * bit 8 (mask 0x100): ScrollLock is on
  3419.   * other bits are cleared
  3420.  
  3421. -------------- Subfunction 4 - set system-wide hotkey. ---------------
  3422. When hotkey is pressed, the system notifies only those applications,
  3423. which have installed it; the active application (which receives
  3424. all normal input) does not receive such keys.
  3425. The notification consists in sending event with the code 2.
  3426. Reading hotkey is the same as reading normal key - by function 2.
  3427. Parameters:
  3428.   * eax = 66 - function number
  3429.   * ebx = 4 - subfunction number
  3430.   * cl determines key scancode;
  3431.     use cl=0 to give combinations such as Ctrl+Shift
  3432.   * edx = 0xXYZ determines possible states of control keys:
  3433.     * Z (low 4 bits) determines state of LShift and RShift:
  3434.       * 0 = no key must be pressed;
  3435.       * 1 = exactly one key must be pressed;
  3436.       * 2 = both keys must be pressed;
  3437.       * 3 = must be pressed LShift, but not RShift;
  3438.       * 4 = must be pressed RShift, but not LShift
  3439.     * Y - similar for LCtrl and RCtrl;
  3440.     * X - similar for LAlt and RAlt
  3441. Returned value:
  3442.   * eax=0 - success
  3443.   * eax=1 - too mant hotkeys (maximum 256 are allowed)
  3444. Remarks:
  3445.   * Hotkey can work either at pressing or at release. Release
  3446.     scancode of a key is more on 128 than pressing scancode
  3447.     (i.e. high bit is set).
  3448.   * Several applications can set the same combination;
  3449.     all such applications will be informed on pressing
  3450.     such combination.
  3451.  
  3452. -------------- Subfunction 5 - delete installed hotkey. --------------
  3453. Parameters:
  3454.   * eax = 66 - function number
  3455.   * ebx = 5 - subfunction number
  3456.   * cl = scancode of key and edx = 0xXYZ the same as in subfunction 4
  3457. Returned value:
  3458.   * eax = 0 - success
  3459.   * eax = 1 - there is no such hotkey
  3460. Remarks:
  3461.   * When a process/thread terminates, all hotkey installed by it are
  3462.     deleted.
  3463.   * The call to this subfunction does not affect other applications.
  3464.     If other application has defined the same combination, it will
  3465.     still receive notices.
  3466.  
  3467. ======================================================================
  3468. ========= Function 67 - change position/sizes of the window. =========
  3469. ======================================================================
  3470. Parameters:
  3471.   * eax = 67 - function number
  3472.   * ebx = new x-coordinate of the window
  3473.   * ecx = new y-coordinate of the window
  3474.   * edx = new x-size of the window
  3475.   * esi = new y-size of the window
  3476. Returned value:
  3477.   * function does not return value
  3478. Remarks:
  3479.   * The value -1 for a parameter means "do not change"; e.g. to move
  3480.     the window without resizing it is possible to specify edx=esi=-1.
  3481.   * Previously the window must be defined by function 0.
  3482.     It sets initial coordinates and sizes of the window.
  3483.   * Sizes of the window are understood in sense of function 0,
  3484.     that is one pixel less than real sizes.
  3485.   * The function call for maximized windows is simply ignored.
  3486.   * For windows of appropriate styles position and/or sizes can be
  3487.     changed by user; current position and sizes can be obtained by
  3488.     call to function 9.
  3489.   * The function sends to the window redraw event (with the code 1).
  3490.  
  3491. ======================================================================
  3492. ====== Function 68, subfunction 0 - get the task switch counter. =====
  3493. ======================================================================
  3494. Parameters:
  3495.   * eax = 68 - function number
  3496.   * ebx = 0 - subfunction number
  3497. Returned value:
  3498.   * eax = number of task switches from the system booting
  3499.     (modulo 2^32)
  3500.  
  3501. ======================================================================
  3502. ======= Function 68, subfunction 1 - switch to the next thread. ======
  3503. ======================================================================
  3504. The function completes the current time slice allocated to the
  3505. thread and switches to the next. (Which thread in which process
  3506. will be next, is unpredictable). Later, when execution queue
  3507. will reach the current thread, execution will be continued.
  3508. Parameters:
  3509.   * eax = 68 - function number
  3510.   * ebx = 1 - subfunction number
  3511. Returned value:
  3512.   * function does not return value
  3513.  
  3514. ======================================================================
  3515. ============= Function 68, subfunction 2 - cache + rdpmc. ============
  3516. ======================================================================
  3517. Parameters:
  3518.   * eax = 68 - function number
  3519.   * ebx = 2 - subfunction number
  3520.   * ecx = required action:
  3521.     * ecx = 0 - enable instruction 'rdpmc'
  3522.       (ReaD Performance-Monitoring Counters) for applications
  3523.     * ecx = 1 - find out whether cache is disabled/enabled
  3524.     * ecx = 2 - enable cache
  3525.     * ecx = 3 - disable cache
  3526. Returned value:
  3527.   * for ecx=0:
  3528.     * eax = the value of cr4
  3529.   * for ecx=1:
  3530.     * eax = (cr0 and 0x60000000):
  3531.     * eax = 0 - cache is on
  3532.     * eax <> 0 - cache is off
  3533.   * for ecx=2 and ecx=3:
  3534.     * function does not return value
  3535.  
  3536. ======================================================================
  3537. =========== Function 68, subfunction 3 - read MSR-register. ==========
  3538. ======================================================================
  3539. MSR = Model Specific Register; the complete list of MSR-registers
  3540. of a processor is included to the documentation on it (for example,
  3541. IA-32 Intel Architecture Software Developer's Manual,
  3542. Volume 3, Appendix B); each processor family has its own subset
  3543. of the MSR-registers.
  3544. Parameters:
  3545.   * eax = 68 - function number
  3546.   * ebx = 3 - subfunction number
  3547.   * ecx is ignored
  3548.   * edx = MSR address
  3549. Returned value:
  3550.   * ebx:eax = high:low dword of the result
  3551. Remarks:
  3552.   * If ecx contains nonexistent or not implemented for this processor
  3553.     MSR, processor will generate an exception in the kernel, which
  3554.     will kill the thread.
  3555.   * Previously it is necessary to check, whether MSRs are supported
  3556.     as a whole, with the instruction 'cpuid'. Otherwise processor
  3557.     will generate other exception in the kernel, which will anyway
  3558.     kill the thread.
  3559.  
  3560. ======================================================================
  3561. ========= Function 68, subfunction 4 - write to MSR-register. ========
  3562. ======================================================================
  3563. MSR = Model Specific Register; the complete list of MSR-registers
  3564. of a processor is included to the documentation on it (for example,
  3565. IA-32 Intel Architecture Software Developer's Manual,
  3566. Volume 3, Appendix B); each processor family has its own subset
  3567. of the MSR-registers.
  3568. Parameters:
  3569.   * eax = 68 - function number
  3570.   * ebx = 4 - subfunction number
  3571.   * ecx is ignored
  3572.   * edx = MSR address
  3573.   * esi:edi = high:low dword
  3574. Returned value:
  3575.   * ebx:eax = copy of esi:edi
  3576. ╟рьхўрэш :
  3577.   * If ecx contains nonexistent or not implemented for this processor
  3578.     MSR, processor will generate an exception in the kernel, which
  3579.     will kill the thread.
  3580.   * Previously it is necessary to check, whether MSRs are supported
  3581.     as a whole, with the instruction 'cpuid'. Otherwise processor
  3582.     will generate other exception in the kernel, which will anyway
  3583.     kill the thread.
  3584.  
  3585. ======================================================================
  3586. ======= Function 68, subfunction 11 - initialize process heap. =======
  3587. ======================================================================
  3588. Parameters:
  3589.   * eax = 68 - function number
  3590.   * ebx = 11 - subfunction number
  3591. Returned value:
  3592.   * eax = 0 - failed
  3593.   * otherwise size of created heap
  3594. Remarks:
  3595.   * The function call initializes heap, from which one can in future
  3596.     allocate and free memory blocks with subfunctions 12 and 13.
  3597.     Heap size is equal to total amount of free application memory.
  3598.   * The second function call from the same process results in
  3599.     returning the size of the existing heap.
  3600.   * After creation of the heap calls to function 64 will be ignored.
  3601.  
  3602. ======================================================================
  3603. ======== Function 68, subfunction 12 - allocate memory block. ========
  3604. ======================================================================
  3605. Parameters:
  3606.   * eax = 68 - function number
  3607.   * ebx = 12 - subfunction number
  3608.   * ecx = required size in bytes
  3609. Returned value:
  3610.   * eax = pointer to the allocated block
  3611. Remarks:
  3612.   * Before this call one must initialize process heap by call to
  3613.     subfunction 11.
  3614.   * The function allocates an integer number of pages (4 Kb) in such
  3615.     way that the real size of allocated block is more than or equal to
  3616.     requested size.
  3617.  
  3618. ======================================================================
  3619. ========== Function 68, subfunction 13 - free memory block. ==========
  3620. ======================================================================
  3621. Parameters:
  3622.   * eax = 68 - function number
  3623.   * ebx = 13 - subfunction number
  3624.   * ecx = pointer to the memory block
  3625. Returned value:
  3626.   * eax = 1 - success
  3627.   * eax = 0 - failed
  3628. Remarks:
  3629.   * The memory block must have been allocated by subfunction 12.
  3630.  
  3631. ======================================================================
  3632. ======== Function 68, subfunction 14 - wait for driver notify. =======
  3633. ======================================================================
  3634. Parameters:
  3635.   * eax = 68 - function number
  3636.   * ebx = 14 - subfunction number
  3637.   * ecx = pointer to the buffer for information (8 bytes)
  3638. Returned value:
  3639.   * buffer pointed to by ecx contains the following information:
  3640.     * +0: dword: constant EV_INTR = 1
  3641.     * +4: dword: driver data
  3642. Remarks:
  3643.   * The current implementation at wait time uses "heavy" operations
  3644.     of task switch.
  3645.  
  3646. ======================================================================
  3647. ====== Function 68, subfunction 15 - set FPU exception handler. ======
  3648. ======================================================================
  3649. Parameters:
  3650.   * eax = 68 - function number
  3651.   * ebx = 15 - subfunction number
  3652.   * ecx = address of the new exception handler
  3653. Returned value:
  3654.   * eax = address of the old exception handler (0, if it was not set)
  3655.  
  3656. ======================================================================
  3657. ============= Function 68, subfunction 16 - load driver. =============
  3658. ======================================================================
  3659. Parameters:
  3660.   * eax = 68 - function number
  3661.   * ebx = 16 - subfunction number
  3662.   * ecx = pointer to ASCIIZ-string with driver name
  3663. Returned value:
  3664.   * eax = 0 - failed
  3665.   * otherwise eax = driver handle
  3666. Remarks:
  3667.   * If the driver was not loaded yet, it is loaded;
  3668.     if the driver was loaded yet, nothing happens.
  3669.   * Driver name is case-sensitive.
  3670.     Maximum length of the name is 16 characters, including
  3671.     terminating null character, the rest is ignored.
  3672.   * The function can load only drivers which are registered in the
  3673.     system; the current implementation contains
  3674.     exactly 2 such drivers:
  3675.     * name SOUND, file /rd/1/drivers/unisound.obj
  3676.     * name INFINITY, file /rd/1/drivers/infinity.obj
  3677.  
  3678. ======================================================================
  3679. ============ Function 68, subfunction 17 - driver control. ===========
  3680. ======================================================================
  3681. Parameters:
  3682.   * eax = 68 - function number
  3683.   * ebx = 17 - subfunction number
  3684.   * ecx = pointer to the control structure:
  3685.     * +0: dword: handle of driver
  3686.     * +4: dword: code of driver function
  3687.     * +8: dword: pointer to input data
  3688.     * +12 = +0xC: dword: size of input data
  3689.     * +16 = +0x10: dword: pointer to output data
  3690.     * +20 = +0x14: dword: size of output data
  3691. Returned value:
  3692.   * eax = determined by driver
  3693. Remarks:
  3694.   * Function codes and the structure of input/output data
  3695.     are defined by driver.
  3696.   * Previously one must obtain driver handle by subfunction 16.
  3697.  
  3698. ======================================================================
  3699. ====== Function 68, subfunction 18 - set SSE exception handler. ======
  3700. ======================================================================
  3701. Parameters:
  3702.   * eax = 68 - function number
  3703.   * ebx = 15 - subfunction number
  3704.   * ecx = address of the new exception handler
  3705. Returned value:
  3706.   * eax = address of the old exception handler (0, if it was not set)
  3707.  
  3708. ======================================================================
  3709. =============== Function 68, subfunction 19 - load DLL. ==============
  3710. ======================================================================
  3711. Parameters:
  3712.   * eax = 68 - function number
  3713.   * ebx = 19 - subfunction number
  3714.   * ecx = pointer to ASCIIZ-string with the full path to DLL
  3715. Returned value:
  3716.   * eax = 0 - failed
  3717.   * otherwise eax = pointer to DLL export table
  3718. Remarks:
  3719.   * Export table is an array of structures of 2 dword's, terminated
  3720.     by zero. The first dword in structure points to function name,
  3721.     the second dword contains address of function.
  3722.  
  3723. ======================================================================
  3724. ====================== Fucntion 69 - debugging. ======================
  3725. ======================================================================
  3726. A process can load other process as debugged by set of corresponding
  3727. bit by call to subfunction 7 of function 70.
  3728. A process can have only one debugger; one process can debug some
  3729. others. The system notifies debugger on events occuring with
  3730. debugged process. Messages are written to the buffer defined by
  3731. subfunction 0.
  3732. Format of a message:
  3733.   * +0: dword: message code
  3734.   * +4: dword: PID of debugged process
  3735.   * +8: there can be additional data depending on message code
  3736. Message codes:
  3737.   * 1 = exception
  3738.     * in addition dword-number of the exception is given
  3739.     * process is suspended
  3740.   * 2 = process has terminated
  3741.     * comes at any termination: both through the system function -1,
  3742.       and at "murder" by any other process (including debugger itself)
  3743.   * 3 = debug exception int 1 = #DB
  3744.     * in addition dword-image of the register DR6 is given:
  3745.       * bits 0-3: condition of the corresponding breakpoint (set by
  3746.         subfunction 9) is satisfied
  3747.       * сшЄ 14: exception has occured because of the trace mode
  3748.         (flag TF is set TF)
  3749.     * process is suspended
  3750. When debugger terminates, all debugged processes are killed.
  3751. If debugger does not want this, it must previously detach by
  3752. subfunction 3.
  3753.  
  3754. All subfunctions are applicable only to processes/threads started
  3755. from the current by function 58 or 70 with set debugging flag.
  3756. Debugging of multithreaded programs is not supported yet.
  3757. The full list of subfunctions:
  3758.   * subfunction 0 - define data area for debug messages
  3759.   * subfunction 1 - get contents of registers of debugged thread
  3760.   * subfunction 2 - set contents of registers of debugged thread
  3761.   * subfunction 3 - detach from debugged process
  3762.   * subfunction 4 - suspend debugged thread
  3763.   * subfunction 5 - resume debugged thread
  3764.   * subfunction 6 - read from the memory of debugged process
  3765.   * subfunction 7 - write to the memory of debugged process
  3766.   * subfunction 8 - terminate debugged thread
  3767.   * subfunction 9 - set/clear hardware breakpoint
  3768.  
  3769. ======================================================================
  3770. = Function 69, subfunction 0 - define data area fror debug messages. =
  3771. ======================================================================
  3772. Parameters:
  3773.   * eax = 69 - function number
  3774.   * ebx = 0 - subfunction number
  3775.   * ecx = pointer
  3776. Format of data area:
  3777.   * +0: dword: N = buffer size (not including this header)
  3778.   * +4: dword: occupied place
  3779.   * +8: N*byte: buffer
  3780. Returned value:
  3781.   * function does not return value
  3782. Remarks:
  3783.   * If the size field is negative, the buffer is considered locked
  3784.     and at arrival of new message the system will wait.
  3785.     For synchronization frame all work with the buffer by operations
  3786.     lock/unlock
  3787.         neg     [bufsize]
  3788.   * Data in the buffer are considered as array of items with variable
  3789.     length - messages. Format of a message is explained in
  3790.     general description.
  3791.  
  3792. ======================================================================
  3793. ===================== Function 69, subfunction 1 =====================
  3794. ============ Get contents of registers of debugged thread. ===========
  3795. ======================================================================
  3796. Parameters:
  3797.   * eax = 69 - function number
  3798.   * ebx = 1 - subfunction number
  3799.   * ecx = thread identifier
  3800.   * edx = size of context structure, must be 0x28=40 bytes
  3801.   * esi = pointer to context structure
  3802. Returned value:
  3803.   * function does not return value
  3804. Format of context structure: (FPU is not supported yet)
  3805.   * +0: dword: eip
  3806.   * +4: dword: eflags
  3807.   * +8: dword: eax
  3808.   * +12 = +0xC: dword: ecx
  3809.   * +16 = +0x10: dword: edx
  3810.   * +20 = +0x14: dword: ebx
  3811.   * +24 = +0x18: dword: esp
  3812.   * +28 = +0x1C: dword: ebp
  3813.   * +32 = +0x20: dword: esi
  3814.   * +36 = +0x24: dword: edi
  3815. Remarks:
  3816.   * If the thread executes code of ring-0, the function returns
  3817.     contents of registers of ring-3.
  3818.   * Process must be loaded for debugging (as is shown in
  3819.     general description).
  3820.  
  3821. ======================================================================
  3822. ===================== Function 69, subfunction 2 =====================
  3823. ============ Set contents of registers of debugged thread. ===========
  3824. ======================================================================
  3825. Parameters:
  3826.   * eax = 69 - function number
  3827.   * ebx = 2 - subfunction number
  3828.   * ecx = thread identifier
  3829.   * edx = size of context structure, must be 0x28=40 bytes
  3830. Returned value:
  3831.   * function does not return value
  3832. Format of context structure is shown in the description of
  3833. subfunction 1.
  3834. Remarks:
  3835.   * If the thread executes code of ring-0, the function returns
  3836.     contents of registers of ring-3.
  3837.   * Process must be loaded for debugging (as is shown in
  3838.     general description).
  3839.  
  3840. ======================================================================
  3841. ===== Function 69, subfunction 3 - detach from debugged process. =====
  3842. ======================================================================
  3843. Parameters:
  3844.   * eax = 69 - function number
  3845.   * ebx = 3 - subfunction number
  3846.   * ecx = identifier
  3847. Returned value:
  3848.   * function does not return value
  3849. Remarks:
  3850.   * If the process was suspended, it resumes execution.
  3851.  
  3852. ======================================================================
  3853. ======== Function 69, subfunction 4 - suspend debugged thread. =======
  3854. ======================================================================
  3855. Parameters:
  3856.   * eax = 69 - function number
  3857.   * ebx = 4 - subfunction number
  3858.   * ecx = thread identifier
  3859. Returned value:
  3860.   * function does not return value
  3861. Remarks:
  3862.   * Process must be loaded for debugging (as is shown in
  3863.     general description).
  3864.  
  3865. ======================================================================
  3866. ======== Function 69, subfunction 5 - resume debugged thread. ========
  3867. ======================================================================
  3868. Parameters:
  3869.   * eax = 69 - function number
  3870.   * ebx = 5 - subfunction number
  3871.   * ecx = thread identifier
  3872. Returned value:
  3873.   * function does not return value
  3874. Remarks:
  3875.   * Process must be loaded for debugging (as is shown in
  3876.     general description).
  3877.  
  3878. ======================================================================
  3879. = Fucntion 69, subfunction 6 - read from memory of debugged process. =
  3880. ======================================================================
  3881. Parameters:
  3882.   * eax = 69 - function number
  3883.   * ebx = 6 - subfunction number
  3884.   * ecx = identifier
  3885.   * edx = number of bytes to read
  3886.   * esi = address in the memory of debugged process
  3887.   * edi = pointer to buffer for data
  3888. Returned value:
  3889.   * eax = -1 at an error (invalid PID or buffer)
  3890.   * otherwise eax = number of read bytes (possibly, 0,
  3891.     if esi is too large)
  3892. Remarks:
  3893.   * Process must be loaded for debugging (as is shown in
  3894.     general description).
  3895.  
  3896. ======================================================================
  3897. == Function 69, subfunction 7 - write to memory of debugged process. =
  3898. ======================================================================
  3899. Parameters:
  3900.   * eax = 69 - function number
  3901.   * ebx = 7 - subfunction number
  3902.   * ecx = identifier
  3903.   * edx = number of bytes to write
  3904.   * esi = address of memory in debugged process
  3905.   * edi = pointer to data
  3906. Returned value:
  3907.   * eax = -1 at an error (invalid PID or buffer)
  3908.   * otherwise eax = number of written bytes (possibly, 0,
  3909.     if esi is too large)
  3910. Remarks:
  3911.   * Process must be loaded for debugging (as is shown in
  3912.     general description).
  3913.  
  3914. ======================================================================
  3915. ======= Function 69, subfunction 8 - terminate debugged thread. ======
  3916. ======================================================================
  3917. Parameters:
  3918.   * eax = 69 - function number
  3919.   * ebx = 8 - subfunction number
  3920.   * ecx = identifier
  3921. Returned value:
  3922.   * function does not return value
  3923. Remarks:
  3924.   * Process must be loaded for debugging (as is shown in
  3925.     general description).
  3926.   * The function is similar to subfunction 2 of function 18
  3927.     with two differences: it requires first remark and
  3928.     accepts PID rather than slot number.
  3929.  
  3930. ======================================================================
  3931. ===== Function 69, subfunction 9 - set/clear hardware breakpoint. ====
  3932. ======================================================================
  3933. Parameters:
  3934.   * eax = 69 - function number
  3935.   * ebx = 9 - subfunction number
  3936.   * ecx = thread identifier
  3937.   * dl = index of breakpoint, from 0 to 3 inclusively
  3938.   * dh = flags:
  3939.     * if high bit is cleared - set breakpoint:
  3940.       * bits 0-1 - condition:
  3941.         * 00 = breakpoint on execution
  3942.         * 01 = breakpoint on read
  3943.         * 11 = breakpoint on read/write
  3944.       * bits 2-3 - length; for breakpoints on exception it must be
  3945.         00, otherwise one of
  3946.         * 00 = byte
  3947.         * 01 = word
  3948.         * 11 = dword
  3949.       * esi = breakpoint address; must be aligned according to
  3950.         the length (i.e. must be even for word breakpoints,
  3951.         divisible by 4 for dword)
  3952.     * if high bit is set - clear breakpoint
  3953. Returned value:
  3954.   * eax = 0 - success
  3955.   * eax = 1 - error in the input data
  3956.   * eax = 2 - (reserved, is never returned in the current
  3957.     implementation) a global breakpoint with that index is already set
  3958. Remarks:
  3959.   * Process must be loaded for debugging (as is shown in
  3960.     general description).
  3961.   * Hardware breakpoints are implemented through DRx-registers of
  3962.     the processor, all limitations results from this.
  3963.   * The function can reinstall the breakpoint, previously set
  3964.     by it (and it does not inform on this).
  3965.     Carry on the list of set breakpoints in the debugger.
  3966.   * Breakpoints generate debug exception #DB, on which the system
  3967.     notifies debugger.
  3968.   * Breakpoints on write and read/write act after
  3969.     execution of the caused it instruction.
  3970.  
  3971. ======================================================================
  3972. ==== Function 70 - work with file system with long names support. ====
  3973. ======================================================================
  3974. Parameters:
  3975.   * eax = 70
  3976.   * ebx = pointer to the information structure
  3977. Returned value:
  3978.   * eax = 0 - success; otherwise file system error code
  3979.   * some subfunctions return value in other registers too
  3980. General format of the information structure:
  3981.   * +0: dword: subfunction number
  3982.   * +4: dword: file offset
  3983.   * +8: dword: high dword of offset (must be 0) or flags field
  3984.   * +12 = +0xC: dword: size
  3985.   * +16 = +0x10: dword: pointer to data
  3986.   * +20 = +0x14: n db: ASCIIZ-string with the filename
  3987.     or
  3988.   * +20 = +0x14: db 0
  3989.   * +21 = +0x15: dd pointer to ASCIIZ-string with the filename
  3990. Specifications - in documentation on the appropriate subfunction.
  3991. Filename is case-insensitive. Russian letters must be written in
  3992. the encoding cp866 (DOS).
  3993. Format of filename:
  3994. /base/number/dir1/dir2/.../dirn/file,
  3995. where /base/number identifies device, on which file is located:
  3996. one of
  3997.   * /RD/1 = /RAMDISK/1 to access ramdisk
  3998.   * /FD/1 = /FLOPPYDISK/1 to access first floppy drive,
  3999.     /FD/2 = /FLOPPYDISK/2 to access second one
  4000.   * /HD0/x, /HD1/x, /HD2/x, /HD3/x to access accordingly to devices
  4001.     IDE0 (Primary Master), IDE1 (Primary Slave),
  4002.     IDE2 (Secondary Master), IDE3 (Secondary Slave);
  4003.     x - partition number on the selected hard drive, varies from 1
  4004.     to 255 (on each hard drive the indexing starts from 1)
  4005.   * /CD0/1, /CD1/1, /CD2/1, /CD3/1 to access accordingly to
  4006.     CD on IDE0 (Primary Master), IDE1 (Primary Slave),
  4007.     IDE2 (Secondary Master), IDE3 (Secondary Slave)
  4008. Examples:
  4009.   * '/rd/1/kernel.asm',0
  4010.   * '/HD0/1/kernel.asm',0
  4011.   * '/hd0/2/menuet/pics/tanzania.bmp',0
  4012.   * '/hd0/1/Program files/NameOfProgram/SomeFile.SomeExtension',0
  4013. Available subfunctions:
  4014.   * subfunction 0 - read file
  4015.   * subfunction 1 - read folder
  4016.   * subfunction 2 - create/rewrite file
  4017.   * subfunction 3 - write to existing file
  4018.   * subfunction 4 - set file size
  4019.   * subfunction 5 - get attributes of file/folder
  4020.   * subfunction 6 - set attributes of file/folder
  4021.   * subfunction 7 - start application
  4022.   * subfunction 8 - delete file/folder
  4023.   * subfunction 9 - create folder
  4024. For CD-drives due to hardware limitations only subfunctions
  4025. 0,1,5 and 7 are available, other subfunctions return error
  4026. with code 2.
  4027.  
  4028. ======================================================================
  4029. === Function 70, subfunction 0 - read file with long names support. ==
  4030. ======================================================================
  4031. Parameters:
  4032.   * eax = 70 - function number
  4033.   * ebx = pointer to the information structure
  4034. Format of the information structure:
  4035.   * +0: dword: 0 = subfunction number
  4036.   * +4: dword: file offset (in bytes)
  4037.   * +8: dword: 0 (reserved for high dword of offset)
  4038.   * +12 = +0xC: dword: number of bytes to read
  4039.   * +16 = +0x10: dword: pointer to buffer for data
  4040.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4041.     given in the general description
  4042.     or
  4043.   * +20 = +0x14: db 0
  4044.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4045. Returned value:
  4046.   * eax = 0 - success, otherwise file system error code
  4047.   * ebx = number of read bytes or -1=0xffffffff if file was not found
  4048. Remarks:
  4049.   * If file was ended before last requested block was read,
  4050.     the function will read as many as it can, and after that return
  4051.     eax=6 (EOF).
  4052.   * The function does not allow to read folder (returns eax=10,
  4053.     access denied).
  4054.  
  4055. ======================================================================
  4056. == Function 70, subfunction 1 - read folder with long names support. =
  4057. ======================================================================
  4058. Parameters:
  4059.   * eax = 70 - function number
  4060.   * ebx = pointer to the information structure
  4061. Format of the information structure:
  4062.   * +0: dword: 1 = subfunction number
  4063.   * +4: dword: index of starting block (beginning from 0)
  4064.   * +8: dword: flags field:
  4065.     * bit 0 (mask 1): in what format to return names,
  4066.       0=ANSI, 1=UNICODE
  4067.     * other bits are reserved and must be set to 0 for the future
  4068.       compatibility
  4069.   * +12 = +0xC: dword: number of blocks to read
  4070.   * +16 = +0x10: dword: pointer to buffer for data, buffer size
  4071.     must be not less than 32 + [+12]*560 bytes
  4072.   * +20 = +0x14: ASCIIZ-name of folder, the rules of names forming are
  4073.     given in the general description
  4074.     or
  4075.   * +20 = +0x14: db 0
  4076.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4077. Returned value:
  4078.   * eax = 0 - success, otherwise file system error code
  4079.   * ebx = number of files, information on which was written to
  4080.     the buffer, or -1=0xffffffff, if folder was not found
  4081. Structure of the buffer:
  4082.   * +0: 32*byte: header
  4083.   * +32 = +0x20: n1*byte: block with information on file 1
  4084.   * +32+n1: n2*byte: block with information on file 2
  4085.   * ...
  4086. Structure of header:
  4087.   * +0: dword: version of structure (current is 1)
  4088.   * +4: dword: number of placed blocks; is not greater than requested
  4089.     in the field +12 of information structure; can be less, if
  4090.     there are no more files in folder (the same as in ebx)
  4091.   * +8: dword: total number of files in folder
  4092.   * +12 = +0xC: 20*byte: reserved (zeroed)
  4093. Structure of block of data for folder entry (BDFE):
  4094.   * +0: dword: attributes of file:
  4095.     * bit 0 (mask 1): file is read-only
  4096.     * bit 1 (mask 2): file is hidden
  4097.     * bit 2 (mask 4): file is system
  4098.     * bit 3 (mask 8): this is not a file but volume label
  4099.       (for one partition meets no more than once and
  4100.       only in root folder)
  4101.     * bit 4 (mask 0x10): this is a folder
  4102.     * bit 5 (mask 0x20): file was not archived - many archivation
  4103.       programs have an option to archive only files with this bit set,
  4104.       and after archiving this bit is cleared - it can be useful
  4105.       for automatically creating of backup-archives as at writing
  4106.       this bit is usually set
  4107.   * +4: byte: type of name data:
  4108.     (coincides with bit 0 of flags in the information structure)
  4109.     * 0 = ASCII = 1-byte representation of each character
  4110.     * 1 = UNICODE = 2-byte representation of each character
  4111.   * +5: 3*byte: reserved (zero)
  4112.   * +8: 4*byte: time of file creation
  4113.   * +12 = +0xC: 4*byte: date of file creation
  4114.   * +16 = +0x10: 4*byte: time of last access (read or write)
  4115.   * +20 = +0x14: 4*byte: date of last access
  4116.   * +24 = +0x18: 4*byte: time of last modification
  4117.   * +28 = +0x1C: 4*byte: date of last modification
  4118.   * +32 = +0x20: qword: file size in bytes (up to 16777216 Tb)
  4119.   * +40 = +0x28: name
  4120.     * for ASCII format: maximum length is 263 characters
  4121.       (263 bytes), byte after the name has value 0
  4122.     * for UNICODE format: maximum length is 259 characters
  4123.       (518 bytes), 2 bytes after the name have value 0
  4124. Time format:
  4125.   * +0: byte: seconds
  4126.   * +1: byte: minutes
  4127.   * +2: byte: hours
  4128.   * +3: byte: reserved (0)
  4129.   * for example, 23.59.59 is written as (in hex) 3B 3B 17 00
  4130. Date format:
  4131.   * +0: byte: day
  4132.   * +1: byte: month
  4133.   * +2: word: year
  4134.   * for example, 25.11.1979 is written as (in hex) 19 0B BB 07
  4135. Remarks:
  4136.   * If BDFE contains ASCII name, the length of BDFE is 304 bytes,
  4137.     if UNICODE name - 560 bytes. Value of length is aligned
  4138.     on 16-byte bound (to accelerate processing in CPU cache).
  4139.   * First character after a name is zero (ASCIIZ-string). The further
  4140.     data contain garbage.
  4141.   * If files in folder were ended before requested number was read,
  4142.     the function will read as many as it can, and after that return
  4143.     eax=6 (EOF).
  4144.   * Any folder on the disk, except for root, contains two special
  4145.     entries "." and "..", identifying accordingly the folder itself
  4146.     and the parent folder.
  4147.   * The function allows also to read virtual folders "/", "/rd",
  4148.     "/fd", "/hd[n]", thus attributes of subfolders are set to 0x10,
  4149.     and times and dates are zeroed. An alternative way to get the
  4150.     equipment information - subfunction 11 of function 18.
  4151.  
  4152. ======================================================================
  4153. ===================== Function 70, subfunction 2 =====================
  4154. ============ Create/rewrite file with long names support. ============
  4155. ======================================================================
  4156. Parameters:
  4157.   * eax = 70 - function number
  4158.   * ebx = pointer to the information structure
  4159. Format of the information structure:
  4160.   * +0: dword: 2 = subfunction number
  4161.   * +4: dword: 0 (reserved)
  4162.   * +8: dword: 0 (reserved)
  4163.   * +12 = +0xC: dword: number of bytes to read
  4164.   * +16 = +0x10: dword: pointer to data
  4165.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4166.     given in the general description
  4167.     or
  4168.   * +20 = +0x14: db 0
  4169.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4170. Returned value:
  4171.   * eax = 0 - success, otherwise file system error code
  4172.   * ebx = number of written bytes (possibly 0)
  4173. Remarks:
  4174.   * If a file with given name did not exist, it is created;
  4175.     if it existed, it is rewritten.
  4176.   * If there is not enough free space on disk, the function will
  4177.     write as many as can and then return error code 8.
  4178.   * The function is not supported for CD (returns error code 2).
  4179.  
  4180. ======================================================================
  4181. ===================== Function 70, subfunction 3 =====================
  4182. =========== Write to existing file with long names support. ==========
  4183. ======================================================================
  4184. Parameters:
  4185.   * eax = 70 - function number
  4186.   * ebx = pointer to the information structure
  4187. Format of the information structure:
  4188.   * +0: dword: 3 = subfunction number
  4189.   * +4: dword: file offset (in bytes)
  4190.   * +8: dword: high dword of offset (must be 0 for FAT)
  4191.   * +12 = +0xC: dword: number of bytes to write
  4192.   * +16 = +0x10: dword: pointer to data
  4193.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4194.     given in the general description
  4195.     or
  4196.   * +20 = +0x14: db 0
  4197.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4198. Returned value:
  4199.   * eax = 0 - success, otherwise file system error code
  4200.   * ebx = number of written bytes (possibly 0)
  4201. Remarks:
  4202.   * The file must already exist, otherwise function returns eax=5.
  4203.   * The only result of write 0 bytes is update in the file attributes
  4204.     date/time of modification and access to the current date/time.
  4205.   * If beginning and/or ending position is greater than file size
  4206.     (except for the previous case), the file is expanded to needed
  4207.     size with zero characters.
  4208.   * The function is not supported for CD (returns error code 2).
  4209.  
  4210. ======================================================================
  4211. ============ Function 70, subfunction 4 - set end of file. ===========
  4212. ======================================================================
  4213. Parameters:
  4214.   * eax = 70 - function number
  4215.   * ebx = pointer to the information structure
  4216. Format of the information structure:
  4217.   * +0: dword: 4 = subfunction number
  4218.   * +4: dword: low dword of new file size
  4219.   * +8: dword: high dword of new file size (must be 0 for FAT)
  4220.   * +12 = +0xC: dword: 0 (reserved)
  4221.   * +16 = +0x10: dword: 0 (reserved)
  4222.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4223.     given in the general description
  4224.     or
  4225.   * +20 = +0x14: db 0
  4226.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4227. Returned value:
  4228.   * eax = 0 - success, otherwise file system error code
  4229.   * ebx destroyed
  4230. Remarks:
  4231.   * If the new file size is less than old one, file is truncated.
  4232.     If the new size is greater than old one, file is expanded with
  4233.     characters with code 0. If the new size is equal to old one,
  4234.     the only result of call is set date/time of modification and
  4235.     access to the current date/time.
  4236.   * If there is not enough free space on disk for expansion, the
  4237.     function will expand to maximum possible size and then return
  4238.     error code 8.
  4239.   * The function is not supported for CD (returns error code 2).
  4240.  
  4241. ======================================================================
  4242. ==== Function 70, subfunction 5 - get information on file/folder. ====
  4243. ======================================================================
  4244. Parameters:
  4245.   * eax = 70 - function number
  4246.   * ebx = pointer to the information structure
  4247. Format of the information structure:
  4248.   * +0: dword: 5 = subfunction number
  4249.   * +4: dword: 0 (reserved)
  4250.   * +8: dword: 0 (reserved)
  4251.   * +12 = +0xC: dword: 0 (reserved)
  4252.   * +16 = +0x10: dword: pointer to buffer for data (40 bytes)
  4253.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4254.     given in the general description
  4255.     or
  4256.   * +20 = +0x14: db 0
  4257.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4258. Returned value:
  4259.   * eax = 0 - success, otherwise file system error code
  4260.   * ebx destroyed
  4261. Information on file is returned in the BDFE format (block of data
  4262. for folder entry), explained in the description of
  4263. subfunction 1, but without filename
  4264. (i.e. only first 40 = 0x28 bytes).
  4265. Remarks:
  4266.   * The function does not support virtual folders such as /, /rd and
  4267.     root folders like /rd/1.
  4268.  
  4269. ======================================================================
  4270. ===== Function 70, subfunction 6 - set attributes of file/folder. ====
  4271. ======================================================================
  4272. Parameters:
  4273.   * eax = 70 - function number
  4274.   * ebx = pointer to the information structure
  4275. Format of the information structure:
  4276.   * +0: dword: 6 = subfunction number
  4277.   * +4: dword: 0 (reserved)
  4278.   * +8: dword: 0 (reserved)
  4279.   * +12 = +0xC: dword: 0 (reserved)
  4280.   * +16 = +0x10: dword: pointer to buffer with attributes (32 bytes)
  4281.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4282.     given in the general description
  4283.     or
  4284.   * +20 = +0x14: db 0
  4285.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4286. Returned value:
  4287.   * eax = 0 - success, otherwise file system error code
  4288.   * ebx destroyed
  4289. File attributes are first 32 bytes in BDFE (block of data
  4290. for folder entry), explained in the description of subfunction 1
  4291. (that is, without name and size of file). Attribute
  4292. file/folder/volume label (bits 3,4 in dword +0) is not changed.
  4293. Byte +4 (name format) is ignored.
  4294. Remarks:
  4295.   * The function does not support virtual folders such as /, /rd and
  4296.     root folders like /rd/1.
  4297.   * The function is not supported for CD (returns error code 2).
  4298.  
  4299. ======================================================================
  4300. =========== Function 70, subfunction 7 - start application. ==========
  4301. ======================================================================
  4302. Parameters:
  4303.   * eax = 70 - function number
  4304.   * ebx = pointer to the information structure
  4305. Format of the information structure:
  4306.   * +0: dword: 7 = subfunction number
  4307.   * +4: dword: flags field:
  4308.     * сшЄ 0: start process as debugged
  4309.     * other bits are reserved and must be set to 0
  4310.   * +8: dword: 0 or pointer to ASCIIZ-string with parameters
  4311.   * +12 = +0xC: dword: 0 (reserved)
  4312.   * +16 = +0x10: dword: 0 (reserved)
  4313.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4314.     given in the general description
  4315.     or
  4316.   * +20 = +0x14: db 0
  4317.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4318. Returned value:
  4319.   * eax > 0 - program is loaded, eax contains PID
  4320.   * eax < 0 - an error has occured, -eax contains
  4321.     file system error code
  4322.   * ebx destroyed
  4323. Remarks:
  4324.   * Command line must be terminated by the character with the code 0
  4325.     (ASCIIZ-string); function takes into account either all characters
  4326.     up to terminating zero inclusively or first 256 character
  4327.     regarding what is less.
  4328.   * If the process is started as debugged, it is created in
  4329.     the suspended state; to run use subfunction 5 of function 69.
  4330.  
  4331. ======================================================================
  4332. ========== Function 70, subfunction 8 - delete file/folder. ==========
  4333. ======================================================================
  4334. Parameters:
  4335.   * eax = 70 - function number
  4336.   * ebx = pointer to the information structure
  4337. Format of the information structure:
  4338.   * +0: dword: 8 = subfunction number
  4339.   * +4: dword: 0 (reserved)
  4340.   * +8: dword: 0 (reserved)
  4341.   * +12 = +0xC: dword: 0 (reserved)
  4342.   * +16 = +0x10: dword: 0 (reserved)
  4343.   * +20 = +0x14: ASCIIZ-name of file, the rules of names forming are
  4344.     given in the general description
  4345.     or
  4346.   * +20 = +0x14: db 0
  4347.   * +21 = +0x15: dd pointer to ASCIIZ-string with file name
  4348. Returned value:
  4349.   * eax = 0 - success, otherwise file system error code
  4350.   * ebx destroyed
  4351. Remarks:
  4352.   * The function is not supported for CD (returns error code 2).
  4353.   * The function can delete only empty folders (attempt to delete
  4354.     nonempty folder results in error with code 10, "access denied").
  4355.  
  4356. ======================================================================
  4357. ============= Function 70, subfunction 9 - create folder. ============
  4358. ======================================================================
  4359. Parameters:
  4360.   * eax = 70 - function number
  4361.   * ebx = pointer to the information structure
  4362. Format of the information structure:
  4363.   * +0: dword: 9 = subfunction number
  4364.   * +4: dword: 0 (reserved)
  4365.   * +8: dword: 0 (reserved)
  4366.   * +12 = +0xC: dword: 0 (reserved)
  4367.   * +16 = +0x10: dword: 0 (reserved)
  4368.   * +20 = +0x14: ASCIIZ-name of folder, the rules of names forming are
  4369.     given in the general description
  4370.     or
  4371.   * +20 = +0x14: db 0
  4372.   * +21 = +0x15: dd pointer to ASCIIZ-string with folder name
  4373. Returned value:
  4374.   * eax = 0 - success, otherwise file system error code
  4375.   * ebx destroyed
  4376. Remarks:
  4377.   * The function is not supported for CD (returns error code 2).
  4378.   * The parent folder must already exist.
  4379.   * If target folder already exists, function returns success (eax=0).
  4380.  
  4381. ======================================================================
  4382. ========== Function 71, subfunction 1 - set window caption. ==========
  4383. ======================================================================
  4384. Parameters:
  4385.   * eax = 71 - function number
  4386.   * ebx = 1 - subfunction number