break_helper
break_helper(force_hwbrks ? "Z1" : "Z0", arg, 0);
break_helper(force_hwbrks ? "z1" : "z0", arg, 0);
break_helper("Z1", arg, 0);
break_helper("z1", arg, 0);
break_helper("Z2", arg, 0);
break_helper("z2", arg, 0);
break_helper("Z4", arg, 0);
break_helper("z4", arg, 0);
break_helper("Z0", NULL, sstep_addr);
break_helper("z0", NULL, sstep_addr);