MTSE_INVRL       2412 src/dps8/dps8_mt.c     else if (code == MTSE_INVRL)
MTSE_INVRL        807 src/simh/sim_tape.c     return MTSE_INVRL;
MTSE_INVRL        868 src/simh/sim_tape.c     return MTSE_INVRL;