PORTIBM PC Portable (uses same BIOS as XT) 020C-020F - AIMS LAB PCIBM PC Radio
Range:	configurable to PORTIBM PC Portable (uses same BIOS as XT) 020Ch or PORTIBM PC Portable (uses same BIOS as XT) 030Ch
Notes:	writing a value with bit 3 set to one of these ports turns on the
	  radio; writing a value with bit 3 clear turns it off
	PORTIBM PC Portable (uses same BIOS as XT) 020Eh bits 1 indicates status of some kind