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ONE
NEXT ROS ADDRESS
SYL
RE-
ROS BASE ADDRESS
FUNCTION Bl T
BRANCH
OP
FETCH
EXT
0
2
3
1
2
A
B
XT RNAL INTERRUPT REGISTER
PSW
ILC
cc
PM
32
33
34
35
36
37
38
39
Bit
Indicator
ALO
Position
Description
ONE SYL OP
KS221
0
One
!r!
op trigger indicates a half word in.tructian.
RE-FETCH
KS211
1
Refetcn stat indicates ihat
Hie
1n.truct1on
DiiTF8r
snouTcf not
lie
usea as in.. source of tne
next instruction.
2-4
Not used.
EXT
5
Additianal bit to address extendedl{OS.
I
0
KKJOf
ROS
1
KK301
BASE
2
KK311
6-11
ROS base address (bits 0-5 of ROAR).
ADR
3
KK311
NEXT
4
KK321
ROS
5
KK301
- - -
-
ADDR
{
0
KKOll
FUNCT
1
KK02l
BIT
2
KK03l
3
KK041
12-15
ROS address function field (bits 6-9 of ROAR).
I
A
KK261
16
A branch (bit 10 of ROAR).
- - -
---i
BRANCH
B
KK271
17
B branch (bit 11 of RO ARj •
- - -
- - -
- - -
I
1
KS271
EXT
2
KS271
IRPT
3
KS271
18-23
External interrupt register.
REG
4
KS281
5
KS28l
6
KS281
r
I
32
RPOOl
33
RPOOl
I
34
RPOll
cc
35
RP021
PSW
r 6
RPOOl
:.!4-~1
rsw
;i2-29.
37
RPOOl
PM
38
RPOOl
39
RPOOl
32-35
Not Used
FIGURE 163. CPU 2 ROLLER - POSITION 3
Appendix B--System Control Panel
(3/71)
179
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