SCPE_NXREG       3607 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6662 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6678 src/simh/scp.c                 return SCPE_NXREG;