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Rev 13 Rev 14
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;   0:9031     word   IDEContrRegsBaseAddr
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;   0:9031     word   IDEContrRegsBaseAddr
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;
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;
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;
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;
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;   Runtime:
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;   Runtime:
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;
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;
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;   0000  ->   2FFF   window_data   - 256 entries
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;   0000  ->   1FFF   window_data   - 256 entries
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;
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;
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;         0000 dword  x start
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;         0000 dword  x start
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;         0004 dword  y start
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;         0004 dword  y start
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;         0008 dword  x size
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;         0008 dword  x size
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;         000C dword  y size
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;         000C dword  y size
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;         0010 dword  color of work area
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;         0010 dword  color of work area
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;         0014 dword  color of grab bar
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;         0014 dword  color of grab bar
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;         0018 dword  color of frames
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;         0018 dword  color of frames
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;         001C dword  window flags, +30 = window drawn, +31 redraw flag
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;         001C dword  window flags, +30 = window drawn, +31 redraw flag
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;
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;
- 
 
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;   2000  ->   2FFF   free
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;
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;   3000  ->   4FFF   task list      - 256 entries
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;   3000  ->   4FFF   task list      - 256 entries
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;
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;
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;         00   dword  process count
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;         00   dword  process count
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;         04   dword  no of processes
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;         04   dword  no of processes
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;         10   dword  base of running process at 0x3000+
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;         10   dword  base of running process at 0x3000+
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;
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;
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;   6F00  ->   7FFF   free
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;   6F00  ->   7FFF   free
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;
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;
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;   8000  ->   A3FF   used FLOPPY driver
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;   8000  ->   A3FF   used FLOPPY driver
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;
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;
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;   A400  ->   AFFF   free
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;   A400  ->   B0FF   free
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;
 - 
 
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;   B000  ->   B005   jump address for irq0 (task switch)
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;   B008  ->   B00B   count of ticks remaining to updating CPU usage info
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;   B060  ->   B0FF   free
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;   B100  ->   B2FF   IDT
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;   B100  ->   B2FF   IDT
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;   C402  ->   C7FF   window position in stack
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;   C402  ->   C7FF   window position in stack
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;   D000  ->   D1FF   FDC controller
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;   D000  ->   D1FF   FDC controller
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;   D200  ->   D3FF   FDC controller for Fat12
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;   D200  ->   D3FF   FDC controller for Fat12
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;   D400  ->   DFFF   free
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;   D400  ->   DFFF   free
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;   E000  byte        multitasking started
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;   E000  byte        multitasking started
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;   E004  dword       save for boot mem 0x24
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;   E010  dword       pm bank switch address
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;   E014  dword       window multiplier
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;   E020  dword       putpixel address
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;   E020  dword       putpixel address
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;   E024  dword       getpixel address
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;   E024  dword       getpixel address
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;   E030  dword       Vesa 1.2 pm bank switch address
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;   E030  dword       Vesa 1.2 pm bank switch address
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;   F000  dword       hd partition 1 start
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;   F004  dword       root start at partition 1
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;   F008  dword       root start at hd
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;   F100  byte        1=only os draw on screen
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;   F200  dword       mousepicture -pointer
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;   F200  dword       mousepicture -pointer
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;   F204  dword       mouse appearance counter
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;   F204  dword       mouse appearance counter
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;   F300  dword       x & y temp for windowmove
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;   F300  dword       x & y temp for windowmove
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;   F400  byte        no of keys in buffer
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;   F400  byte        no of keys in buffer
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;   F401  byte        'buffer'
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;   F401  byte        'buffer'
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;   FB28              high bits temp
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;   FB28              high bits temp
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;   FB30              color temp
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;   FB30              color temp
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;   FB40  byte        buttons down
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;   FB40  byte        buttons down
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;   FB44  byte        0 mouse down -> do not draw
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;   FB44  byte        0 mouse down -> do not draw
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;   FB4A  ->   FB4D   FB4A-B x-under - FB4C-D y-under
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;   FB4A  ->   FB4D   FB4A-B x-under - FB4C-D y-under
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;   FBF0  byte        multiplied window
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;   FBF1  byte        bits per pixel
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;   FBF1  byte        bits per pixel
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;   FC00  ->   FCFE   com1/ps2 buffer
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;   FC00  ->   FCFE   com1/ps2 buffer
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;   FCFF              com1/ps2 buffer count starting from FC00
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;   FCFF              com1/ps2 buffer count starting from FC00
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;   FDF0  ->   FDF3   timer tick inc every 1/100 sec 4 bytes
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;   FE00  dword       screen x size
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;   FE00  dword       screen x size
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;   FE04  dword       screen y size
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;   FE04  dword       screen y size
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;   FE08  dword       screen y multiplier
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;   FE08  dword       screen y multiplier
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;   FE0C  dword       screen mode
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;   FE0C  dword       screen mode
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;   FE10  dword       entries in hd cache
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;   FE10  dword       entries in hd cache
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;
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;
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;         00   dword  draw limit - x start
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;         00   dword  draw limit - x start
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;         04   dword  draw limit - y start
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;         04   dword  draw limit - y start
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;         08   dword  draw limit - x end
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;         08   dword  draw limit - x end
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;         0C   dword  draw limit - y end
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;         0C   dword  draw limit - y end
- 
 
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;
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;         1C   dword  app int vector
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; C02000  -> C02fff   free (4 Kb)
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;
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;
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; C03000  -> D02fff   sysint_stack_data
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; C03000  -> D02fff   sysint_stack_data
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;                     - ring0 stacks for ring3 processes
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;                     - ring0 stacks for ring3 processes
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;                     - used for interrupt handling
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;                     - used for interrupt handling
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;                     - 256 entries * 4096 step
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;                     - 256 entries * 4096 step