30 Mar
2007
30 Mar
'07
9:29 a.m.
I had written....
> This would make me
> think the problem is more likely something about the RL02 or M8256.
I *HATE* it when I make a typo that isn't obvious and may throw people off.
Of course, I meant that "the problem is more likely something about the RX02
or M8256". Or... ya know... the backplane could be the culprit here. But the
important point... the RL02 definitely works and loads correctly as long as
the RX02 is powered off.
You can work your way back from the signal that drives
the FAULT
lamp on the RL02. Perhaps an other approach is to check what signals
go from the RX02 drive to the M8256 RX211 controller. Especially,
where the signals from that flatcable go on the RX211 module, and
what effect they might have on the UNIBUS. Perhaps there is a short
in the flatcable between the RX02 and the RX211 that acts up when
the RX02 is powered?
Yes, but.... if that's the case... why does the RX02 work
perfectly.
Separately, each one (RL02 and RX02) works just fine, boots an OS, etc. But
if they are both on... RL02 faults after spinup.
Thanks for the tips!
Jay