donm@pnet07.cts.com (Don Maslin) (04/09/90)
It would be helpful to those who might be able to help you to know what make and model your Z80 machine is. As you probably are aware, each manufacturer elected to use his own combination of port addresses and peripheral chips, and CP/M is not very portable from one make (sometimes, one model) of machine to another. Do I also infer that you are running DOS 2.11 on the same machine? There are only a few that have that dual capability. UUCP: {nosc ucsd crash ncr-sd}!pnet07!donm ARPA: simasd!pnet07!donm@nosc.mil INET: donm@pnet07.cts.com