SCPE_TTYERR      6439 src/simh/scp.c     return SCPE_TTYERR;
SCPE_TTYERR      2009 src/simh/sim_console.c     return SCPE_TTYERR;
SCPE_TTYERR      2028 src/simh/sim_console.c     return SCPE_TTYERR;
SCPE_TTYERR      2056 src/simh/sim_console.c     return SCPE_TTYERR;
SCPE_TTYERR      2061 src/simh/sim_console.c         return SCPE_TTYERR;