SCPE_NXREG       3595 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6650 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6666 src/simh/scp.c                 return SCPE_NXREG;