QOUTFIFO_NEXT_ADDR
ahd_outb(ahd, QOUTFIFO_NEXT_ADDR, busaddr & 0xFF);
ahd_outb(ahd, QOUTFIFO_NEXT_ADDR + 1, (busaddr >> 8) & 0xFF);
ahd_outb(ahd, QOUTFIFO_NEXT_ADDR + 2, (busaddr >> 16) & 0xFF);
ahd_outb(ahd, QOUTFIFO_NEXT_ADDR + 3, (busaddr >> 24) & 0xFF);