INT 17 U - Emulaser ELTSR - SET ???                                             
	AX = 0502h
	BL = Emulaser port (31h = LPT1, 32h = LPT2, 33h = LPT3)
	CL = ???
	DL = ???
Return: (see AX=0500h)
SeeAlso: AH=04h,AX=0500h,INT 1A/AH=E5h