Understanding DECsystem 5100 Self Test Failure
Robert Jarratt
robert.jarratt at ntlworld.com
Sun Jan 4 13:46:39 CST 2015
When I power up my DECsystem 5100 I get the output shown at the end of this
email. I thought this was to do with the DS1287 chip as it seems be an NVRAM
battery error (perhaps). Since I know these devices fail I took out the
DS1287, put in a socket and then bought a replacement DS12887A. But I still
get the same problem. It could be that I bought a bad replacement, or that I
have done some damage in my desoldering of the original, or it could be that
the error is something completely different. In fact the Maintenance Manual
suggests test 9 is to do with the DZ, and I can't find what test 4 relates
to.
Does anyone know what this failure is if it isnt' the DS1287?
Is there an easy way to test a DS1287?
Regards
Rob
26..25..24..23..22..21..20..19..18..17..16..15..14..14..14..
13..12..11..10..09..?45a nv ba?45a nv bat
?45a nv ba?45a nv bat
?45a nv ba?45a
nv bat
08..07..06..05..04..?45a nv bat
03..
?45a nv bat
?45a nv bat
?45a nv bat
?45a nv bat
?45a nv bat
?45a nv bat
KN230 V1.4
08-00-2b-27-04-50
0x800000
>> conf -f
hardware: revision 1
firmware: revision 5
cpu: revision 2.32
fpu: revision 3.32
security switch: secure mode
password: clear
eeprom: valid
ethernet hardware address: 08-00-2b-27-04-50
option board: not present
memory: total size 8MBs
bank0 4MB SIMMs size: 8MBs 0 bad pages
scsi peripherals
unit type product removable/fixed capacity
7 host adapter
>> prcache
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