Model_30_Microprogramming_Lang.pdf part of IBM Model 30 Microprogramming Lang Model_30_Microprogramming_Lang.pdf, IBM 360 fe 2030 Model_30_Microprogramming

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Contents
INTRODUCTION 1

MODEL 30 MACHINE CONTROL SPECIFICATIONS 1

CONTROL FIELD DESCRIPTION. . . . . . . . 1

CONTROL FIELDS (DETAILED EXPLANATIONS) 2
CN Field 2
PN Field 2
PA Field 2
CH and CL Fields. 2
CL Field 3
CM Field 5
CU Field 6
Alternate CU Field . 6
CA Field . . . . . 6
Alternate CA Field . 7
CB Field . . . . . 8
CK Field . . . . . 8
Alternate CK Field 8
PK Field 9
PS Field 9
CD Field 10
CF Field 11
CG Field .11
CV Field 11
CC Field 12
CS Field . 12
Alternate CS Field . 14
EXAMPLES OF MICROWORD FORMAT 16
CH and CL Branching . . . . . . . 17
CM Field-Read, Compute, and Write 19
CU Field-Area of Memory to be Addressed 21
Alternate CU Field . . . . . . . . . . . 22
CA Field and Alternate CA Field-A Register Inputs 24
CB Field-B Register Inputs . 24
CK Field-Constant Generator 24

IBM Co"fident;," iii;
Alternate CK Field . . . . . . . . . . . 25
CD Field-Destination for the ALU Output 25
CF Field . . . . . . . . . . . . . . . . 26
CG Field . . . . . . . . . . . . . 27
CC Field-Carry Inputs and Outputs 27
CS Field-Status