SCPE_NXREG       3663 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6720 src/simh/scp.c             return SCPE_NXREG;
SCPE_NXREG       6736 src/simh/scp.c                 return SCPE_NXREG;