PCMMIO_AO_MSB_REG  639 drivers/staging/comedi/drivers/pcmmio.c 	outb(0, iobase + PCMMIO_AO_MSB_REG);
PCMMIO_AO_MSB_REG  651 drivers/staging/comedi/drivers/pcmmio.c 		outb((val >> 8) & 0xff, iobase + PCMMIO_AO_MSB_REG);