Hi,
A few weeks ago I commented that I was setting up a SIMH VAXstation 4000 and
had noticed some failures in the console self-test. Since then I've had it
running more or less continously and in general it works nicely, but I have
noticed something odd: VMS logs a MEMORY ERROR every minute.
The VMS ERRLOG.SYS entry looks like this:
******************************* ENTRY 94828. *******************************
ERROR SEQUENCE 12105. LOGGED ON: SID 1200000E
DATE/TIME 6-AUG-2019 15:52:49.10 SYS_TYPE 04140002
SYSTEM UPTIME: 0 DAYS 00:11:59
SCS NODE: EWOK VAX/VMS V7.3
HARD ERROR KA46
PARCNTRL 010000F1
FILTER ENABLE
MEMCON 7F3F0000
MEMORY CONFIGURATION:
_TOTAL MEMORY = 104 MB
_On Board MEMORY (8MB) - CPU MODULE
_MS44-CA MEMORY SIMM(16MB)BANK 1 FRONT
_MS44-CA MEMORY SIMM(16MB)BANK 1 REAR
_MS44-CA MEMORY SIMM(16MB)BANK 2 FRONT
_MS44-CA MEMORY SIMM(16MB)BANK 2 REAR
_MS44-CA MEMORY SIMM(16MB)BANK 3 FRONT
_MS44-CA MEMORY SIMM(16MB)BANK 3 REAR
MEMERR FFFFFFFF
Memory Parity Error
Byte Mask = F(X)
Memory Error Address = 07FFFFFC(X)
Write Wrong Parity Set
Memory Parity Checking Enabled
PCSTS 00000000
PRIMARY CACHE DISABLED
BACKUP CACHE MISS
SCCR 00000100
SPECIO: NORMAL IO ADDR
The error details are always the same.
I have not been able to identify the cause of these errors so I'm wondering
how to start looking using SIMH's diagnostic/debugging facilities. Any tips
would be welcome.
Thanks,
Jeremy Begg
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