SCPE_UNATT 5785 src/simh/scp.c return SCPE_UNATT; SCPE_UNATT 6552 src/simh/scp.c return SCPE_UNATT; SCPE_UNATT 6643 src/simh/scp.c return SCPE_UNATT; SCPE_UNATT 240 src/simh/sim_tape.c return SCPE_UNATT;