IOAT2_CHANCMD_OFFSET
? IOAT1_CHANCMD_OFFSET : IOAT2_CHANCMD_OFFSET)
writeb(IOAT_CHANCMD_SUSPEND, registers + IOAT2_CHANCMD_OFFSET);
writeb(IOAT_CHANCMD_RESET, registers + IOAT2_CHANCMD_OFFSET);
chancmd = readb(registers + IOAT2_CHANCMD_OFFSET);
? IOAT1_CHANCMD_OFFSET : IOAT2_CHANCMD_OFFSET)