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Prime Proprietary
Corrective Maintenance
TABLE 6-12: MACHINE CHECK CODES DEFINED
DSWSTATH (ABS loc. 35 octal)
Bit = 1234567891011 12 13 14 15 16
CMMM
MC
RE
£E
B
RPBUP
D
I
Ic PMMACH
CC
C
U
M
/
CHK
MC
C
N
Xx
O
CODE
UC
sV
*
MC= set - indicates a Machine Check error.
Look at MCC and RCM to identify the
source of error.
MCC =
Type of Failure
Possible Cause
(5-7)
(In order of likelihood)
000 0
None
---
001 1
BPD
1-CPU, 2-controller
010 2.
BMD
]-CPU, 2~Memory
O11 3
Cache data
1-CPU
100 4.
—~-BPA parity
1-CPU, 2-controller
101 5
STLB
1-CPU, 2-controller
110 6
BMA parity
1-CPU, 2-Memory
111 7
A-Board parity
1-CPU
*NOTE:
RCM (bit 8)=RESET - indicates the CPU has a microcode
parity error.
MCC is invalid.
=
SET - no RCM parity.
MCC is valid.
6.2.4.5 Troubleshooting Flowcharts
Figures
6-1
through
6-5
and
Tables
6-13
through
6-17
explain
troubleshooting procedures for each of the following conditions:
e
The
@
The
e@
The
@
The
@
The
system will not boot.
system halted while running PRIMOS,
system has halted and cannot MASTER CLEAR.
system has a valid PRIMOS halt.
system halted during a cold start.
6 ~- 17
070-C
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