SCPE_TTYERR      6569 src/simh/scp.c     return SCPE_TTYERR;
SCPE_TTYERR      2010 src/simh/sim_console.c     return SCPE_TTYERR;
SCPE_TTYERR      2027 src/simh/sim_console.c     return SCPE_TTYERR;
SCPE_TTYERR      2055 src/simh/sim_console.c     return SCPE_TTYERR;
SCPE_TTYERR      2060 src/simh/sim_console.c         return SCPE_TTYERR;