IDEDMA_SCH_OFFSET
if (size > (IDEDMA_SCH_OFFSET - reg))
size = IDEDMA_SCH_OFFSET - reg;
#define PDC268_INDEX(chan) (0x01 + IDEDMA_SCH_OFFSET * (chan))
#define PDC268_DATA(chan) (0x03 + IDEDMA_SCH_OFFSET * (chan))
#define IDEDMA_TBL(chan) (0x04 + IDEDMA_SCH_OFFSET * (chan))
#define IDEDMA_CMD(chan) (0x00 + IDEDMA_SCH_OFFSET * (chan))
#define IDEDMA_CTL(chan) (0x02 + IDEDMA_SCH_OFFSET * (chan))