This is why I'm positng about progress.
I'm well above average with tools, test gear, spare parts and debug
skills. I seriously wonder how many of the "I want a SROCTH because
I've heard they are neat(kewl, cool, gnarly...)." have the skills or
the clues to even power it successfully. These things are as far from
PCs as one gets. The end result is destruction rather than preservation.
OH, "SROCTH" is Some Rare Old Computer To Hack.
Part of the power supply work was removing and repairing an existing
bungled hack that had some of the foil burnt off the board, likely with
some soldering torch of killer proportions. When dealing with old power
supplies like this substitutions are not a good thing.
<Great progress! The stuck bit won't be hard to find/fix. I had a couple of
<bad TTL chips when debugging the 8/f here, they were easy to find. Similar
<problem (always-off bit in certain I/O operations).
I will find it but first back to the power supply as the -15V folded.
<Let us know how your core plane works!
Initial tests indicate it was good, I was able to run a simple 5
instruction program. Short story. The core in this one came from an
8E that had two 8k stacks I got from the Mill in '85 and gave away in
90 or 91 to another Digit (digit=person that works/worked at Digital).
It was known good when given away.
<Schematics and other info's on highgate (when you get time to download the
<viewer!).
There is no free or shareware viewer for that format I can find. If you
have one it can likely save the file as jpg of gif. Why an oddball version
of TIFF was used is beyond me.
Allison
Received on Sun Apr 04 1999 - 12:40:50 BST