write_bit_register
status_t (*write_bit_register)(uint32 regid, uint32 val);
write_bit_register
sAcpi->write_bit_register(ACPI_BITREG_BUS_MASTER_STATUS, 1);
sAcpi->write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, 1);
sAcpi->write_bit_register(ACPI_BITREG_ARB_DISABLE, 1);
sAcpi->write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, 0);
sAcpi->write_bit_register(ACPI_BITREG_ARB_DISABLE, 0);