The floppy interface (in the SuperI/O chip) is hardwired to DMA channel 2. The parallel interface can use DMA channel 3 during certain modes of operation. The audio controller chip (ES1888) is capable of using DMA channels 0, 1, or 3 for general DMA and channel 5 for system DMA.
DMA channels 0-3 and 5-7 can be used by any of the three ISA slots on the riser card. The following table summarizes the DMA channel assignments (H=hardwired, P=program selected)
| Device | DMA Channels | |||||||
|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| FDC | - | - | H | - | - | - | - | - |
| Parallel | - | - | - | H | - | - | - | - |
| Audio | P | P | - | P | - | H | - | - |
| ISA | P | P | P | P | P | P | P | P |