Int 7A Fn 0001  R - Autocad Device Interface - Display - Initialize (init  [A]

   AX = 0001h
   BX = configuration
   CX = interface level (0001h)

Return: AX = status
       0000h initialization failed
       0001h pre-v4.0 driver initialized successfully
       0003h post-v3.1 driver initialized successfully (driver truncates
             excessivly long packets)
   BX = width of graphics area in pixels, or 0000h if using packet
             communication
   DX:CX -> packet-mode entry point

See Also: AX=0001h,AX=0200h,AX=07D0h,INT 61/AX=0007h"OPTIMA",INT 78"AutoCAD"

See Also: INT 79/AX=0001h,INT 7B/AX=8001h"AutoCAD",INT 7C"AutoShade"

Call packet-mode entry point with:
STACK: DWORD   pointer to request packet
   WORD    length of packet

Format of request packet:
Offset Size    Description
 00h   WORD    function number (00h-45h for Compaq VGADI41.EXE)