INT 17 - Brother P-Touch - INSTALLATION CHECK                                   
	AX = 4B00h
Return:	AX = 4249h ('BI' = Brother International) if installed
	    BX = program ID
		4550h ('EP') for "Epson FX-80 Emulator"
		5047h ('PG') for "Printer to Disk Utility"
	    CX = numbero of parallel port being emulated or intercepted
SeeAlso: AX=4B01h