INT 2F,1 - Multiplex Interrupt - Submit file

	AL = 01
	AH = 01  resident portion of PRINT
	     02  resident portion of ASSIGN
	     06  get pointer to ASSIGN drive translation table (undoc DOS 3+)
	     10  resident portion of SHARE
	     B7  resident portion of APPEND
	     C0-FF reserved for user applications
	DS:DX = pointer to a 5 byte packet containing an priority byte
		and a DWORD pointer to an ASCIIZ filename
	DS:DI
	
	on return:
	ES = segment of ASSIGN work area and assignment table (AH=6 only)