RXFIFOCSR
bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */
bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */
bmwrite(dev, RXFIFOCSR, RxFIFOEnable );