INT 20 P - Microsoft Windows - DWCFGMG.SYS - VxDA virtual device driver for Windows 3.x or 95.	So called because nearly all of the Windows 3.0 drivers had names of the form "VdeviceD". See also device driver. SERVICES
	VxDA virtual device driver for Windows 3.x or 95.	So called because nearly all of the Windows 3.0 drivers had names of the form "VdeviceD". See also device driver. = 0034h
Note:	the desired VxDA virtual device driver for Windows 3.x or 95.	So called because nearly all of the Windows 3.0 drivers had names of the form "VdeviceD". See also device driver. and service number are identified by the data
	  immediately following the INT 20 instruction, as in:
		INT	20h
		DW	service number
		DW	VxDA virtual device driver for Windows 3.x or 95.	So called because nearly all of the Windows 3.0 drivers had names of the form "VdeviceD". See also device driver. identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running.  Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes.",INT 30"Windows",#01265,#01340


(Table 01298)
Values for DWCFGMG.SYS (VxDA virtual device driver for Windows 3.x or 95.	So called because nearly all of the Windows 3.0 drivers had names of the form "VdeviceD". See also device driver. 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"
SeeAlso: INT 2F/AX=1684h/BX=0034h