rptXn            1626 src/dps8/dps8_cpu.h     uint rptXn;
rptXn             581 src/dps8/dps8_faults.c           cpu.rX[cpu.rptXn] = cpu.rptXnOld;
rptXn            1916 src/dps8/dps8_ins.c         cpu.rptXn      = Xn;