ASC_IOP_REG_IX   1295 dev/ic/advlib.h #define ASC_READ_CHIP_IX(iot, ioh)				bus_space_read_1((iot), (ioh), ASC_IOP_REG_IX)
ASC_IOP_REG_IX   1296 dev/ic/advlib.h #define ASC_WRITE_CHIP_IX(iot, ioh, data)			bus_space_write_1((iot), (ioh), ASC_IOP_REG_IX, data)