[Simh] MicroVAX 3900 simulator fails BIST sometimes?

[Robert Armstrong]

  I've found that on occasion the MicroVAX 3900 simh will fail the built in
self test.   Just to be clear, this is the self test that's in the
MicroVAX-III EPROM image that's failing; it's not VMS.

 

legato-hecnet.sim-73> boot cpu

 

KA655X-B V5.3, VMB 2.7

Performing normal system tests.

40..39..38..37..36..35..34..33..32..31..

 

?53 2 0A FF 00 0000

 

P1=00000002  P2=00000028  P3=00002712  P4=00D40077  P5=00000001

P6=FFFFFFFF  P7=00000000  P8=00000000  P9=00000000 P10=20051CE0

r0=00000007  r1=20140110  r2=6954A9F0  r3=0002FF6A  r4=6954A9FA

r5=2004E8F9  r6=00018678  r7=000186C8  r8=0001ADB2 ERF=80000000

30..29..28..27..26..25..

24..23..22..21..20..19..18..17..16..15..14..13..12..11..10..09..

08..07..06..05..04..03..

Normal operation not possible.

 

 

  Does anybody else have this problem?  It seems to be random and not easily
reproducible.  It happens once every dozen restarts or so, but when it does
happen I can just restart simh and it'll work fine the next time.

 

  It's a bit annoying because it makes the auto-restart of my emulated VMS
system fail..

 

Bob

 

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