SCPE_NXREG       3785 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6845 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6861 src/simh/scp.c                 return SCPE_NXREG;