I do have to admit that once I did crack the hood on
my old beat up Peanut and saw THOSE CHIPS...I groaned
AFAIK, the only really custom part in the PCjr is the video gate array.
There's a couple (?) of ROMs of course, but the rest of the stuff is
inwardly. I then purposed to collect only machines
which all parts were *commonly* available. Then I
I tried to make that decision too. I avoided the early 80's home
computers, with their ULAs, etc.
And then the problems started. I had to have a BBC micro, right? Even
though there are a pair of ULAs in it. And that led to be wanting, and
eventually getting an ACW....
And I fell in love with HP machines, particularly desktop 'calculators'.
The early ones -- 9100, 98x0, etc were OK. Just transistors, and then TTL
and simple PROMs. The 9815 was a 6800 system, and I could fix that (apart
from the thermal printhead hybrid). But the 9825, 9845
had custom hybrid
processor modules, the 80 series are all custom chips, and so on.
reluctantly added them to the collection... The HP9000/200 series are OK
(68000 + TTL + PALs + not too much else), the 9000/300s seem to have big
ASICs in them next to the processor.
Oh well... My justification is that they're beautiful machines, and if
they fail there's always a chance I'll find another one with a different
fault. Might as well enjoy them now -- but not depend on them.
found a *new* 2000. Then the Mindsets. Don't even
what's inside my Canon Cat. And the one thing the Jr
That worries me. How can you own a machine for more than an hour without
cracking the case and seeing what all the chips are?