Fault Status Registers - Xerox 550 Reference Manual

APPENDIX C. FAULT STATUS REGISTERS
Table C-1. Fault Status Registers
Bit
Status Registers
~
Faults Detected By:
Position Basic Processor
MIOP MI PI
System Control
Processor
0 16 PFI PFI PFI
PFI PFI
1 17
General register parity Bus Check Fault Map or access - pro- Cluster bus Parity error on
error
(BCF tec t reg i ster pari ty error parity error processor bus
2 18 Control register parity Control Check
Cl uster bus pari ty error Processor bus Operation code
error
Fault (CCF) parity error error
3 19 Interna I basi c processor Control Memory Reserved
Unrecognized Reserved
bus pari ty error Fault (CMF) operati on code
4
20
Cluster bus parity error CMF
II
0
adapter Reserved Reserved Reserved
5 21 Processor-Detected
MIE Cluster bus sequence Reserved Reserved
Fault flag (PDF) check fault
6 22 Memory parity error Data/order
" Reserved Reserved Reserved
indicator t
7 23 Memory Interface Error
Out/In i ndicator t
Reserved
Multiple error
Reserved
(MIE)
8
24
Processor interface Control Memory Reserved Control Memory Reserved
sequence .check fault Fault (CMF) Fault (CMF)
address bi t 0 address bit 0
9 25 Extended arithmetic CMF Reserved
CMF Reserved
sequence check fault address bi t 1
address bit 1
10
26 Basic processor
CMF Reserved CMF Reserved
sequence check fault
address bi t 2 address bi t 2
11
27 Successfu I i nstructi on CMF
Reserved CMF Reserved
retry address bi t 3 address bi t 3
12 28 Control memory pari ty
CMF Reserved CMF Reserved
error (BPE module)
address bit 4 address bit 4
13
29
Control memory parity CMF Reserved CMF Reserved
error (BPF module) address bi t 5 address bi t 5
14
30
Control memory parity CMF Reserved CMF Reserved
error (BPG module) address bi t 6 address bit 6
15 31 Control memory pari ty CMF Reserved CMF
Reserved
error (BPH module) address bi t 7
address bi t 7
tThis is a 2-bit code indicating type of service call, as follows:
Bits MIOP
Bits MIOP
6
7 Significance
6
7
Significance
-
0
0 Data In 1 0 Order In
0 1 Data Out 1 1 Order Out
Appendix C 177