TRS-80 Model I

[Ethan Dicks]

On 2/4/07, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
> There was a CP/M+ for it (the M4 could officially take 128K of RAM, I
> believe there were hacks to put 256K chips, not 64K in bank 1...).

Interesting.  So much I didn't know about the machines at the time (I
was programming the C-64 for money at the time, so that took up all my
attention).

> Mind you, I am not sure why you'd _want_ to run CP/M on it. The 'native'
> TRS-DOS 6.x (aka LS-ODS) is a much nicer OS, with loadable device
> drivers, some (limited) I/O redirection, a better scripting facility, etc.

Because in High School, I couldn't afford a machine that ran CP/M, but
I got a chance to use them on occasion.  It would have been nice to
get some experience on a platform that was in widespread use at the
time (although its market share was already shrinking due to the
recent release of PC-DOS :-P)

> > School, our "Computer Math" class was done with a M3 and M4 running
> > TRS-DOS.  If I'd known I could have gotten CP/M for it at the time (c.
>
> The Model 4 will run all Model 3 software, including booting all Model 3
> OSes. If you were running Model 3 TRS-DOS (TRS-DOS 1.x) I can understand
> why you'd want to run something else :-)

Yep... we all got one disk which worked on either machine.  I can't
recall the exact version, but 1.something sure sounds familiar.

-ethan