Control Data Corporation CYBER 180 810 Maintenance And Parts Manual page 81

Re~ister Byte Number Bit Number Description
OS Bounds
3
24-26
N/A
27 Barrel
1
PPll bit vector
28 Barrel
1
PPlO bit vectot'"
29 Barrel
1
PP7 bit vectot'"
30 Barrel
1
PP6 bit vectot'"
31
Barrel
1
PPS bit vectot'"
4 32-39
N/A
5-7 40-45
Not used
46-63
OS boundary address
Environment Control
0-3 0-:31
N/A
4
32
N/A
33
** Not used
34 Not used
35-39
PP number
5 40,41
N/A
42 Not used
43-47
Channel number
6 48-49
**
Not used
50
Not used
51 Load mode
52
**
Dump mode
53 Idle mode
54,55 Register select (A,P,Q,K)
7
**
56 Barrel 1 block mode select
57 Barrel 0 block mode select
58 Enable deadstart/dump/idle
59 Enable test mode
60 Enable OS bounds checking
61
Enable (R)+(A) to PP memory
62 Not used
63 Enable error stop
Status
0-3
0-31
NIA
4
32-37
M/A
4-6 38-55 Internal registet'" (A,P,Q,K)
7 ***
56 LOS bit
57
N/A
58
N/A
59 Barrel reconfiguration
60-63
PP reconfiguration
**
Byte or Bit cleared by Master Clear.
***
Byte latched by Master Clear.
Not used Bits are not assigned; may be read or written.
N/A Bits not available will always be zero.
60469500 B
5-5