Int 20/Vx=0034h

Microsoft Windows - DWCFGMG.SYS - VxD SERVICES

VxD = 0034h

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 01298)
Values for DWCFGMG.SYS (VxD ID 0034h) service number:
00h    "CM_GetVersion" get supported DDI version.
Return:
EAX = 00000000h if not installed
else
AH = major version number
AL = minor version number
EBX = number of devices controlled by DWCFGMG.SYS
01h    "CM_GetConfig" get device configuration.
EBX = device index.
EDI -> buffer for configuration information (see #02675).
Return:
EAX = status (0000h successful, 0001h index out of range)
02h    "CM_LockConfig" lock device configuration.
EDI -> configuration information (see #02675).
Return:
EAX = status
0000h successful
0001h resource conflict
0002h invalid request
03h    "CM_UnlockConfig" unlock device configuration.
EDI -> configuration information (see #02675).
Return:
EAX = status (0000h successful, 0001h invalid request)
04h    "CME_QueryResources"
05h    "CME_AllocResources"
06h    "CME_DeallocResources"

See Also: INT 2F/AX=1684h/BX=0034h

Category: Windows - Int 20h - M

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