16 Dec
2015
16 Dec
'15
10:07 a.m.
I suspect the answer is no, but before I spend a few afternoons tracing out the diagrams,
does anyone have a schematic or (real) service manual for the Diablo/Xerox 3000
computer, in particular the MRPRO CPU board.
This is a 1980s all-in-one business desktop computer with 2 internal 8" drives. Based
on
an 8085 CPU.
I have one that was mangled in the house-move (the movers decided to cut the keyboard
cable for me). I have now repaired that (and the signals do make sense) but I have other
faults (these were probably there before the move, I had not run it for many years).
Power
lines are fine, CPU chip is getting a clock, but the ready pin is held low. So not a lot
happening....
The CPU board is not complicated, really (about 50 ICs, all of them standard) so it is
going
to be possible for me to trace the schematic if that's what is needed...
-tony
16 Dec
16 Dec
11:23 a.m.
On 12/16/2015 10:07 AM, tony duell wrote:
I suspect the answer is no, but before I spend a few
afternoons
tracing out the diagrams, does anyone have a schematic or (real)
service manual for the Diablo/Xerox 3000 computer, in particular the
MRPRO CPU board.
This is a 1980s all-in-one business desktop computer with 2 internal
8" drives. Based on an 8085 CPU.
Actually, a 70s micro--I used to work with the guys who did a lot of the
development. Of the ones still alive, I doubt that any has held onto
design documents. I do know that bits and pieces of 3000 code made it
into the Durango machines.
--Chuck
12:42 p.m.
This is a 1980s all-in-one business desktop
computer with 2 internal
8" drives. Based on an 8085 CPU.
Actually, a 70s micro--I used to work with the guys who did a lot of the From what I can see the logic looks fairly standard
(apart from the
disk controller...) so figuring it out, at least the bit I think I
need to
figure out, will not take too long.
-tony
9:02 a.m.
I have one that was mangled in the house-move
(the movers decided to cut the keyboard
cable for me).
Wow, did you get any compensation? from one of my PDP11/10s was ripped out (no good reason
for doing this, it
was coiled up on top of the processor box), I haven't fixed
that yet
Just about every keyboard I own lost keycaps. Still looking for ones for a couple
of HP86Bs and a Newbrain
And a number of things, some of sentimental value (like a Nikon lens [1] tbat was
the last thing my father and I ever talked about), others of financial value, and some
of almost no value at all (the set of screws and internal bracketry I need to put my
R80 together) 'disappeared.
[1] I have managed to buy another one of these, but it's not the same, of course.
They were clueless about this, they took a relatively common and not-too-valuable
lens because, I guess, it looked impressive (300mm f/4.5) while leaving the much
nicer PC-Nikkor.
I estimate the total loss (including repairs) is well into 5 figures. I could have taken
them to court, but as a friend said 'There's one of you, six of them and they
will
lie through their teeth'. So I just have to put thing right as best I can.
To tie in another thread, my big regret is not renting back the house I sold (the
seller would have let me do this) for a month and giving 3 of my friends
\pounds 10000 each to do the move for me. It would have cost a bit more
but I would not be now looking for a keycap for a Newbrain or the gas strut
brackets for an R80.
-tony
/P
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