SCPE_NXREG       3789 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6867 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6883 src/simh/scp.c                 return SCPE_NXREG;