Subj : Re: BBSing on CP/M
To   : acn
From : Dr. What
Date : Sat Sep 18 2021 21:33:00


 ac> There was MP/M, the multi-user CP/M OS. It supported different users
 ac> on terminals on a Z80.

Ooo..  I forgot about that.  Do you happen to know how widespread MP/M got? 
I've never actually seen a computer that ran it.

 ac> And there was Concurrent CP/M on x86, I guess it also supported
 ac> virtual terminals and multitasking.

I've started looking into CP/M-86, but I didn't know that Concurrent made their
own version.  Intersting.  Something more for me to research.

 ac> But the bare CP/M did not support multitasking, neither on Z80 nor on
 ac> x86.

I know that there was a program called Double Duty for the TRS-80 line.  It let
you load 2 programs into memory and swap between them.  But I think that was
the most the Z80 could do along the idea of "multitasking".


.... In an empty head, you can hear forever....
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