PORTIBM PC Portable (uses same BIOS as XT) 0178-017F - PCIBM PC radio by CoZet Info Systems
Range: The I/O address range is dipswitch selectable from:
038-03F and 0B0-0BF
078-07F and 0F0-0FF
138-13F and 1B0-1BF
178-17F and 1F0-1FF
238-23F and 2B0-2BF
278-27F and 2F0-2FF
338-33F and 3B0-3BF
378-37F and 3F0-3FF
Notes: All of these addresses show a readout of FFh in initial state.
Once started, all of the addresses show FBh, whatever might happen.