Journal ma1wrbu5tr's Journal: Finally, something interesting
Wow! Finally something interesting to write in my journal on slashdot. (I hate the punctuation rules involved in ending a sentence in
I am the proud new owner of a DG (Digital Group
Inc) kit computer. A colleague's late husband willed this to me
(indirectly),
and I am just beginning to get the thing put back together.
My first computer was a Timex/Sinclair 1000... which I got in 1983.
Even that machine seems very
poor in quality to the 70's DG I have now.
Same processor type Z80x, but very different systems.
What I love most, is the processor independent mainBUSboard(DG-1002).
It could take a 65k, and from what I understand, a 68k CPU. In addition
to the ole 8080; using a CPU board rather than socket. The big
advantage to having these back then, was, as it has forever been, in
the memory.(more to come on this)
Here are some of the links I've found thus far.
http://www.bytecollector.com/the_digital_group.htm
http://www.selectric.org/thedigitalgroup/index.html
http://thedigitalgroup.org/tdgblog/index.php
Well, I finally got time to work on the DGI kit computer I recently
got.
Preliminary testing indicates that the power supply, a 30 lb. beast
made by North Electric
originally intended for someone
at GTEIS, is in good
working order. All volt/amps are well within tolerances, so I started
to connect wiring to the appropriate
places on the switches, lock, and main Bus board. I was about to insert
the processor board, and noticed TWO badly burnt resistors.
Darn! This does not bode well for the rest of things, since we all know
how sensitive chips are to power spikes.
Anyway, I'm ordering replacements for those resistors and three
components in every direction relational to the
circuit.
In addition, I actually found a Mostek Z80a CPU on eBay. Think I'll buy
it just in case.
Further physical inspection of the rest of the boards reveal no obvious
toasted components; however,
I'm going to reserve judgement until I can get a logic probe and learn
how to use it.
This is a big setback. If anyone reading this has helpful hints, spare
parts, or links to documentation
other than what I've found at the sites listed in my previous entry, please feel free to send me a
message,
or leave a comment.
Finally, something interesting More Login
Finally, something interesting
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