L68_OU_HIST_REG  4395 src/dps8/dps8_cpu.c     add_history (L68_OU_HIST_REG, w0, w1);
L68_OU_HIST_REG  7418 src/dps8/dps8_ins.c                     uint reg = cpu.tweaks.l68_mode ? L68_OU_HIST_REG : DPS8M_DU_OU_HIST_REG;