SCPE_NXREG       3710 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6789 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6805 src/simh/scp.c                 return SCPE_NXREG;