72-pin SIMMs of all sizes (both FPM and EDO) seem to
be going dirt cheap
on
Ebay these days; apparently someone has found some
value in the vintage
computer maintenance market and started manufacturing them. I can get
128 MB SIMMs of both types for $20 (128MB is as large as a 72-pin SIMM can
get, and not widely supported; I'm assuming the 9000 only does up to 32 MB
per SIMM, which is a common limit).
From what I've read, that looks correct. The
712/60, at least, has 4 slots
and is listed with a max of 128 MB. Guess I'll be
hitting the Bay and doing
my best to get compatible SIMMs.