mode_reg          680 src/dps8/dps8_scu.c     sim_printf("mode_reg: %06o\n",       scup -> mode_reg);
mode_reg         1628 src/dps8/dps8_scu.c             scu [scu_unit_idx].mode_reg = getbits36_18 (regq, 54 - 36);
mode_reg         1901 src/dps8/dps8_scu.c             putbits36_18 (regq, 54 - 36, scu [scu_unit_idx].mode_reg);
mode_reg         2462 src/dps8/dps8_scu.c         scu [u].mode_reg     = 0;   // used by T&D
mode_reg           81 src/dps8/dps8_scu.h     word18 mode_reg;