12 Nov
2019
12 Nov
'19
8:40 a.m.
According to the Fiche I have for ENKCC version 1.2 (Diagnostic Listing)
dated September 1982 - VAX 11/730 MCT MICRO
Test 33: Moving Inversion Test on Array (M8728 ARRAY or M8391 MCT Module)
Error 8:
"Moving Inversion failed on descending path with background of 0's Bit
being toggled is either bit 0 or bit 1"
"If a failure occurs the address being accessed will be in LS 9 and can
be examined via EX LS 9. The bit being toggled at the maxiumum rate
will be in WR 3 and can be examined by typing EX WR 3. OTHER data is
not used so as to insure that the test runs as fast as possible."
On 11/9/2019 2:41 PM, Josh Dersch via cctalk wrote:
Hi all --
The VAX-11/730 we have running here at the museum has developed a fault
that occurs only sporadically, usually days apart. Running the complete
diagnostic suite for the better part of a week reveals this:
SECT TST ERR EXP REC OTHER MSK MODULE
ENKCC 33 08 000000FF 000000DF N/A FFFFFF00 M8391 M8728
Re-running only ENKCC, this error is repeatable (though it still takes a
couple of days for it to occur). It helpfully points out the MCT (M8391)
and memory boards (M8728) as possible causes; we have spare M8728s and I've
swapped them around with no change in behavior. I have a spare M8391 in my
own collection but it fails in a completely different way so that's not
much help.
I cannot find any real documentation for ENKCC so I don't know what TEST 33
is doing, nor what ERROR 8 indicates in this context, though it seems we're
dropping a bit somewhere :). Anyone out there sitting on a pile of 11/730
documentation?
Thanks as always!
- Josh