)
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
SeeAlso: #01267,#02646,#02683 at INT 2F/AX=1684h/BX=0444h