IA                938 src/dps8/dps8_cpu.h     word4 IA;      // 20-23 IA        System control illegal action lines
IA                520 src/dps8/dps8_faults.c     cpu . cu . IA               = 0;
IA                621 src/dps8/dps8_faults.c           cpu . cu . IA        = 0;
IA                623 src/dps8/dps8_faults.c           cpu . cu . IA        = 010;
IA                784 src/dps8/dps8_faults.c     cpu.cu.IA        = 0;
IA                409 src/dps8/dps8_ins.c     putbits36_4 (& words[1], 20, cpu.cu.IA);
IA                684 src/dps8/dps8_ins.c 
IA                416 src/dps8/panelScraper.c                 SETL (bank_a, 20+3, cpu.cu.IA, 4);