C. CH
=
0111 through IIII and CL
=
1000 through 1110
00
-
SO G7
01
~
10
r-
1 1
-
This signifies branching on latches in registers. If the S register 0 bit and the G register 7 bit
are on, this condition forces a branch to the microword identified by 11.
D. CL
=
0010
703
805
-
CA08-W
This signifies a module change. This condition indicates that the address of the next micro-
word is in the 800 block.
18
IBM Confidential

2 CM FIELD-READ, COMPUTE. AND WRITE
A.
CM
=
0000 and 0010
-
WRI
TE
or
STORE
Either instruction sends a write call to memory if preceded by a read cycle.
B. CM
=
000/
- G
+
D-R
Signifies a compute cycle and does not ask for a read or write call.
C. CM
=
00/1 through 01//
-
IJ-MN
or
UV-MN
T-N
GUV-MN
All of these instructions send a read call to memory and provide the memory address.
IBM Confidential
19,
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