INT 20 - Microsoft Windows - NDIS2SUP - VxD SERVICES

	VxD = 0496h
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 #02642)
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340