SCPE_UNATT 6526 src/simh/scp.c return SCPE_UNATT; SCPE_UNATT 7296 src/simh/scp.c return SCPE_UNATT; SCPE_UNATT 7387 src/simh/scp.c return SCPE_UNATT; SCPE_UNATT 245 src/simh/sim_tape.c return SCPE_UNATT;