National semiconductor 8641, DEC part.
Unfied bus tranceiver if my memory is working.
2. Can I replace it, or am I just screwed?
You'll have to get it off an old board that is junked.
3. Is there a way that with only a voltmeter (I
don't have and can't
afford a scope) to verify that the chip's dead? (I'm overly
It's dead, replace it. whats scary is that they are likely others that
havent smoked yet. Some one else more expereinced with unibus will have
to comment but you likely have cookd a fair number of those on that group
of bus lines.
4. What stupid mistake am I gonna make next?
My bets are that the tape drive will be dead for some reason
and I stomp on the RSTS tape, or get halfway thru the restore,
hit a bad block on the tape, and end up with an unusable drive.
Failing that, I'll either crash the RL02 (I only have one pack)
or find a way to nuke the 83 and the 34A at the same time.
Hurrier you go the behinder you'll get.