Problem with Nat Semi ICM-3216

From: Steve Jones <classiccmp_at_crash.com>
Date: Fri Nov 22 22:35:00 2002

I recently picked up a couple of ICM-3216s and am hoping the
following might make sense to someone more familiar with them.

There are two systems comprised of a CPU board, one 4MB memory
board, and an ICM-SIO-M-08 board with its own 32016, 32201, and
four 2681 DUARTs for 8 serial ports. The SIO board in front of me
is a 980600014-001 Rev D (the 001 and D are hand written) The
EPROMs in U5 and U6 show Rev B on their labels, and I can give
the full P/N if it will help.

When retired from service several-many years ago, these machines
were timesharing hosts and used all these serial ports. Now when
I try to power up either system with the SIO board in the stack,
the system won't initialize. If I remove the SIO from the stack
the system will initialize and I can boot Unix on one box, or
talk to the monitor on the other (disk won't spin).

Does this make sense to anyone familiar with these systems? I
suspect someone else has seen this, given the way it's impacting
both systems... I suppose I'll start checking out the third box,
which lacks an SIO, and see what it does with it.

Thanks for any thoughts, or even unrelated reminisences about the
ICMs or the 32k in general.

--Steve.

Steve Jones spamfree.crash.com!smj Arlington, Mass.
CRASH!! Computing (any spambots parse bang paths?) +1 781 xxx yyyy

"Chaos will ensue if the variable i is altered..." - SysV Programmers Guide
Received on Fri Nov 22 2002 - 22:35:00 GMT