INT 7A R - AutoCAD Device Interface - RENDERING DEVICE - INITIALIZE (RDLINKUP)
	AX = 0200h
	BX = 0000h
	CX = interface level (0001h)
Return: BX = 0000h (driver uses packet communication)
	DX:CX -> packet-mode entry point (see #03832)
SeeAlso: AX=0001h"AutoCAD",INT 79/AX=0001h,INT 7B/AX=8001h"AutoCAD"