SCPE_TTYERR      5815 src/simh/scp.c     return SCPE_TTYERR;
SCPE_TTYERR      1978 src/simh/sim_console.c     return SCPE_TTYERR;
SCPE_TTYERR      1997 src/simh/sim_console.c     return SCPE_TTYERR;
SCPE_TTYERR      2025 src/simh/sim_console.c     return SCPE_TTYERR;
SCPE_TTYERR      2030 src/simh/sim_console.c         return SCPE_TTYERR;