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Source code of Windows XP (NT5)
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windows-xp/Source/XPSP1/NT/base/mvdm/dos/v86/inc/umb.inc

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  1. ;******************************************************************************
  2. ;
  3. ; (C) Copyright MICROSOFT Corp. 1989
  4. ;
  5. ; Module: UMB.INC - Definitions for link umb utility
  6. ;
  7. ; Version: 0.01
  8. ;
  9. ; Date: Jun. 26, 1990
  10. ;
  11. ;
  12. ;******************************************************************************
  13. ;
  14. ; Change log:
  15. ;
  16. ; DATE REVISION DESCRIPTION
  17. ; -------- -------- -------------------------------------------------------
  18. ; 06/26/90 Original
  19. ;
  20. ;******************************************************************************
  22. XMM_MULTIPLEX equ 43h ; XMM multiplex number of INT 2Fh
  23. XMM_INSTALL_CHECK equ 00h ; install check call
  24. XMM_FUNCTION_ADDR equ 10h ; get control function address call
  25. ;
  26. ; XMM functions
  27. ;
  28. XMM_GET_VERSION equ 00h
  29. XMM_REQUEST_UMB equ 10h
  30. XMM_RELEASE_UMB equ 11h
  31. ;
  32. ; All error codes has this bit on.
  33. ; Used for test sucess of XMM_QUERY_FREE_EXTMEM
  34. ;
  35. XMM_ERROR_BIT equ 80h
  37. ;
  38. ; Previous HIMEM.SYS versions are not reliable
  39. ;
  40. GOOD_HIMEM_VERSION equ 208h
  43. ;** Arena Header
  44. ;
  46. arena STRUC
  47. arena_signature DB ? ; 4D for valid item, 5A for last item
  48. arena_owner DW ? ; owner of arena item
  49. arena_size DW ? ; size in paragraphs of item
  50. arena_reserved DB 3 DUP(?) ; reserved
  51. arena_name DB 8 DUP(?) ; owner file name
  52. arena ENDS
  54. arena_owner_system EQU 0 ; free block indication
  56. arena_signature_normal EQU 4Dh ; valid signature, not end of arena
  57. arena_signature_end EQU 5Ah ; valid signature, last block in arena
  59. DOS_ARENA EQU 24H ; offset of arena_head var in DOS
  60. ; data segment
  61. UMB_ARENA EQU 8CH ; offset of umb_head in DOS data
  63. .list ; end of UMB.INC
  64.