ia_port           692 src/dps8/dps8_faults.c                 cpu.cu.IACHN = ia_port (cpup);
ia_port           700 src/dps8/dps8_faults.c             cpu.cu.IACHN = ia_port (cpup);
ia_port           709 src/dps8/dps8_faults.c         cpu.cu.IACHN = cpu.cu.IA ? ia_port (cpup) : 0;