Of course all you can do at that prompt is load the
microcode from
the TU58, so that is what I am trying to get working. And getting
nowhere!
And you don't want to use a TU58 emulator?
No, I don't
want to use a TU58 emulator for the same reason that I am
restoring this VAX and not running a VAX emulator.
I can certainly understand that. But a TU58 emulator could be a useful
diagnostic tool. Personally, I would try to get it working from the
emulator first; that would give me a reasonable level of confidence
that, when chasing a bug in the TU58, I'm actually chasing a bug in the
TU58 and not a bug in the CPU.
Similarly, it could be a useful diagnostic tool to connect the real
TU58 hardware to a known-working (presumably slightly more modern)
machine to see if it's willing to work that way.
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