SCPE_NXREG       3790 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6901 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6917 src/simh/scp.c                 return SCPE_NXREG;