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 >
