Xerox 560

APPENDIX C. FAULT STATUS REGISTERS
Table C-1. Fault Status Registers
Status Registers - Faults
Detected By:
Bit
System Control
Position
Basic Processor
MIOP RMP
MI PI Processor
0
16 PFI
PFI PFI
PFI PFI PFI
1 17 General register
Bus Check Fault
BCF
Mapor access- Cluster bus Parity error on
parity error
(BCF) protect register parity error
processor bus
pari
ty error
2
18
Control register
·Control Check
CCF
Cluster bus Processor bus Operation
parity error
Fault (CCF)
parity error parity error code error
3
19
Internal
basic processor
Control Memory
CMF
Reserved
Unrecognized Reserved
bus pari
ty error
Fault (CMF)
operation code
4
20
Clusterbus parity error CMF I/o adapter ECE
Reserved Reserved Reserved
5
21
Processor-Detected
MIE
MIE
Cluster bus
Reserved Reserved
Fault flag (PDF)
sequence check
fault
6
22
Memory
parity error
Data/order
Order Reserved Reserved Reserved
indicator
t
type
t
7 23
Memory
Interface
Out indicator
t
Order Reserved Multiple error Reserved
Error (MIE)
type
t
8
24 Processor interface Contro I Memory Reserved Reserved Control Memory Reserved
sequence check Fault (CMF)
Fault (CMF)
fault
address bit 0 address bit 0
9
25 Extended
arithmetic
CMF
Reserved Reserved
CMF
Reserved
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address bit
1
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10 26 Basi c processor
CMF
Reserved Reserved
CMF
Reserved
sequence check fau It address bit 2 address bit 2
11
27
Successfu I instruc-
CMF
Reserved Reserved
CMF
Reserved
tion retry address bit 3 address bit 3
12 28 Control memory parity CMF Reserved Reserved
CMF
Reserved
error
(BPE module)
address
bit 4 address bit 4
13
29
Control memory parity
CMF
Reserved Reserved
CMF
Reserved
error
(BPF module) address bit 5 address bit 5
14 30
Control memory parity
CMF
Reserved
Reserved
CMF
Reserved
error
(B PG modu Ie)
address bit 6 address bit 6
15
31
Control memory parity CMF Reserved Reserved
CMF
Reserved
error
(BPH module)
address
bit 7
address
bit 7
tThis
is a 2-bit code indicating type of service call,
as follows:
Bits
MIOP RMP
-
6 7 Signifi cance Significance
-
-
0
0
Data In Sense
0
1
Data Out Write
1
0
Order In Read
1
1
Order Out Control
Appendix C 195