PIIX4_SMBHSTCMD
bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, byte);
*byte = bus_read_1(sc->io_res, PIIX4_SMBHSTCMD);
bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);
bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);
bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);
bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);
bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);
bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);