Steve, I used the IDMA on an MPC821 to perform IDE transfers (either to floppy or hard disk drive). At this time, my O.S was pSOS. You have just to be aware that the IDMA is done via software by the CPM of the MPC821. So you won't exceed a 2Mbytes/s throughput.
Laurent ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
