SCPE_UNATT 6331 src/simh/scp.c return SCPE_UNATT; SCPE_UNATT 7101 src/simh/scp.c return SCPE_UNATT; SCPE_UNATT 7192 src/simh/scp.c return SCPE_UNATT; SCPE_UNATT 241 src/simh/sim_tape.c return SCPE_UNATT;