DBG_MSG          1157 src/dps8/dps8_cpu.c     { "MESSAGES",    DBG_MSG,         NULL },
DBG_MSG          3706 src/dps8/dps8_cpu.c         sim_debug (DBG_MSG, & cpu_dev,
DBG_MSG          3794 src/dps8/dps8_cpu.c     sim_debug (DBG_MSG, & cpu_dev,
DBG_MSG          8700 src/dps8/dps8_ins.c                 sim_debug (DBG_MSG, & cpu_dev, "BCE DIS causes CPU halt\n");
DBG_MSG          8720 src/dps8/dps8_ins.c 
DBG_MSG          8730 src/dps8/dps8_ins.c                 sim_debug (DBG_MSG, & cpu_dev, "sys_trouble$die DIS causes CPU halt\n");