Flashing Light Indicators un Simple Front Panels - test-drb@ccmp.vtda.org

17 Dec 2001

...
  No, I'm afraid you may have hit it on the head,
and it's been the
 direction I've been leaning, that the microcode ROMs may have
 fried, but that just blows my mind. Tonight, I'll set up the
 PC that's got my ROM burner/reader, and read each one (if the
 ROMs aren't too large a size for my Needham unit). I'm assuming
 I'll see all 00s or all FFs (or maybe something like FEs) if
 they're blown; been a long time since I've looked at popped
 ROMs... 
Ok, my microcode ROMs are fine, via direct observation 
(dumped them to disk then ran them through my LOW7 filter
to strip the mark parity bit from the Prime ASCII. I also
verified the ROMs are OK by managing to provoke the system
to issue an error message that resides *only* in those ROMs.

...
  About the only other possibility is that the backplane
got
 cooked, but it looks fine... 
There are still some possibilities other than this, the
Primes appear to have been way-overengineered w/r/t making
sure the power is OK.

Thanks for all the suggestions, folks...

-dq