IBM Model 30 Microprogramming Lang free download

File name Model_30_Microprogramming_Lang.pdf

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