mbx_used_flags    357 src/dps8/dps8_dia.c     word36 mbx_used_flags;
mbx_used_flags    284 src/dps8/dps8_fnp2.h     word36 mbx_used_flags;
mbx_used_flags    122 src/dps8/dps8_fnp2_iomcmd.c     sim_printf ("mbx_used_flags     %012llo\n", (long long unsigned int) mbx.mbx_used_flags);