INT 1A - Disk Spool II v4.0x - ENABLE/DISABLE

	AH = E0h
	AL = subfunction
	    01h enable spooler
	    02h disable spooler
	    03h enable despooler
	    04h disable despooler
	CL = printer port (01h COM1, 02h COM2, 05h LPT1, 06h LPT2)
Return: AH = status
	    00h successful
	    F0h printer port not managed by Disk Spool II
	    FFH failed
Note:	this function is also supported by Vertisoft's Emulaser utility ELSPL,
	  as that is a licensed version of Disk Spool II
SeeAlso: AH=A0h,AH=E1h,AX=E301h,AX=E401h