11/45-1, Jay-0

From: Jay West <jwest_at_classiccmp.org>
Date: Thu Feb 17 21:03:25 2005

Checked out my supplies and powered up. Sometimes the processor comes up
"pause", sometimes no status light. I checked the light test and many lights
are burned out. It doesn't seem to retain any values I store in memory, and
"addresses error" was a frequent visitor. It's very possible I'm not
operating the panel correctly, it's a bit different than what I'm used to.

Just out of curiosity, I'm wondering about checking the voltages of the
regulators at the backplane. I found the charts to decipher the pin
references, I believe the first pin called out to check for +5 was A02A2. I
can find that pin, but where exactly is the ground reference for that? I
checked the voltages at the regulators instead, but was just curious for
future reference. All the grounds appear to go to the backplane traces from
the mate & locks so there's no obvious lead going to a pin on the backplane.

I'm not completely sure where to head next - I feel completely uneducated
enough to know what to look at, so I'm going to just plow through more
manuals. My initial suspicion is something with the core setup, I wonder if
the MF11-L assigns address space based on slot or on jumpers. I tried
swapping boards (sorry Tony!) in the core section and the problem didn't
seem to change at all. It's sucessive presses of DEP supposed to
automatically increment the address? Not sure it's doing that.

So, my hope that it would just "work" is gone. Let the fun begin :)

Received on Thu Feb 17 2005 - 21:03:25 GMT

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