z8530_sync_dma_open -- Open a Z8530 for DMA I/O
(struct net_device * dev, struct z8530_channel * c);
The network device to attach
The Z8530 channel to configure in sync DMA mode.
Set up a Z85x30 device for synchronous DMA in both directions. Two
ISA DMA channels must be available for this to work. We assume ISA
DMA driven I/O and PC limits on access.