WR3
setsioreg(sc->sc_ctl, WR3, sc->sc_wr[WR3]);
setsioreg(sc->sc_ctl, WR3, sc->sc_wr[WR3]);
sc->sc_wr[WR3] &= ~WR3_RX8BIT;
sc->sc_wr[WR3] |= WR3_RX7BIT;
sc->sc_wr[WR3] |= WR3_RX8BIT;
setsioreg(sc->sc_ctl, WR3, sc->sc_wr[WR3]);
setsioreg(sio, WR3, ch0_regs[WR3]);
sioreg(REG(0, WR3), WR3_RX8BIT | WR3_RXENBL);
sioreg(REG(1, WR3), WR3_RX8BIT | WR3_RXENBL);