Looking for documentation for VAX-11/730 ENKCC Diagnostic

Jay Jaeger cube1 at charter.net
Tue Nov 12 10:40:46 CST 2019

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:
> 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

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