IBM System/360 2050 Maintenance Manual page 181

Processing unit
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REGISTER
L BYTE CNTR
M
F RE
4
1/0
TIMER CONS
Q
MODE
0
IRPT
IRPT
0
p
0
REG
EDIT STATS
GENERAL PURPOSE STATS
L
R
4
6
SIGN
SIGN CARRY
RTL
RI
WI
Bit
Indicator
ALO
Pa.ition
Description
I,&
MODE
KUlll
0
!L2._mode tr!s&_er i• an
duri~!L2._rautines.
~
{ ~
Rll 11
Rll 11
1-3
1/0 regi•ter and parity (used far byte addreHing in 1/0 mode).
Rllll
TIMER IRPT
KS251
4
Timer
intem~e!
stat (1et
~timer counti~
ta zero).
CONS IRPT
KS251
5
Camole
interr~
•tat J!et
!:!r_
interr~
switch).
-
{
~
CLOOl
L BYTE
CLOOl
6-8
L byte caunter and parity (L register byte selectian).
CNTR
CLOOl
MB
{
~
CMOOl
CMOOl
9-11
M byte counter and parity (M regi•ter byte 1electian).
CNTR
CMOOl
fl
RF021
RFOOl
F
RFOOl
REG
RFOOl
12-16
F register and parity (four bit 1hift •pill and enter).
RFOll
Q
REG
RF031
17
Q
r!i)•ter (ane bit 1hift
~II
and enter).
EDIT
I
~
KK581
18-19
Edit stah cantrol operation during.edit .instructian.
STATS
KK581
!!
KS101
KSl 11
KS121
GP
KS131
STATS
KS141
20-27
General purpase stah 0-7 (multipurpose stah).
KS151
KS161
KS171
L SIGN
KS201
28
L r'!S.!ster
•ia!i
1tat]9n far Po$itiv!f.
R SIGN
KS201
29
R r'!S.!ster •.!J!.n stat}>n for pQ1itive}.
CARRY
KS231
30
Car".Y_ stat _lon far cariy_ i nserft.
RTL
KS631
31
RetrL threshald latch indicates whether instructian retrl_ is aanible _ltestedl>.i<_
SfKK
p!!)Sl'_.a'!![.
r l
KC501
STORAGE
R2
KC501
RING
R3
KC501
32-35
Storage ring pasitiam Rl, R2, R3, and Wl.
Wl
KC501
FIGURE 164. CPU 2 ROLLER - POSITION 4
180
(3/71)
Madel 50 FEMM

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