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Microsoft Windows - VDMAD - VxD SERVICES

VxD = 0004h

Note: The desired VxD and service number are identified by the data immediately following the INT 20 instruction, as in: INT 20h DW service number DW VxD identifier

See Also: INT 2F/AX=1684h"DEVICE API" - INT 30"Windows" - #01265 - #01340

(Table 01268)
Values for VDMAD (VxD ID 0004h) service number:
0000h  get version
0001h  virtualize channel
0002h  get region information
0003h  set region information
0004h  get virtual state
0005h  set virtual state
0006h  set physical state
0007h  mask channel
0008h  unmask channel
0009h  lock DMA region
000Ah  unlock DMA region
000Bh  scatter lock
000Ch  scatter unlock
000Dh  reserve buffer space
000Eh  request buffer
000Fh  release buffer
0010h  copy to buffer
0011h  copy from buffer
0012h  default handler
0013h  disable translation
0014h  enable translation
0015h  get EISA address mode
0016h  set EISA address mode
0017h  unlock DMA region (ND)
0018h  "VDMAD_Phys_Mask_Channel"
0019h  "VDMAD_Phys_Unmask_Channel"
001Ah  "VDMAD_Unvirtualize_Channel"
001Bh  "VDMAD_Set_IO_Address"
001Ch  "VDMAD_Get_Phys_Count"
001Dh  "VDMAD_Get_Phys_Status"
001Eh  "VDMAD_Get_Max_Phys_Page"
001Fh  "VDMAD_Set_Channel_Callbacks"
0020h  "VDMAD_Get_Virt_Count"
0021h  "VDMAD_Set_Virt_Count"
0021h  ...last service for Windows95 SP1

See Also: #01267 - #02646 - #02683 at INT 2F/AX=1684h/BX=0444h

Category: Windows - Int 20h - M

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