fault_ic          254 src/dps8/dps8_faults.c static word18 fault_ic;
fault_ic          264 src/dps8/dps8_faults.c            sim_printf ("  faulting address %05o:%06o\n", fault_psr, fault_ic);
fault_ic          418 src/dps8/dps8_faults.c     fault_ic  = cpu . PPR.IC;