SCPE_NXREG       3785 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6832 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6848 src/simh/scp.c                 return SCPE_NXREG;