24 Apr
1998
24 Apr
'98
9:51 a.m.
On Thu, 23 Apr 1998, Ward Donald Griffiths III wrote:
A TRS-80 Model 3 runs CP/M only with extensive
modifications. The
easiest such modification was the Model 4 upgrade several years
later entailing a motherboard replacement (and no, you didn't get to
keep the old parts).
Actually, the only requirement for the original motherboard was that the
service shop had to drill a hole through it. (Size may have been
specified, I don't know.) In any case, I have several M3 motherboards
with a hole drilled through a ground plane. (And still quite functional.)
Ward Griffiths
ttyl
srw