> Now NetBSD/arc has bus_dma support (jazz bus support was contributed 
> by Urata-san), and the code is known to work on PCI busmaster DMA
> on RISCstation 2250. But the code is not tested with ISA DMA or 
> ISA busmaster DMA.

Hmmm, I've checked the code...
At least ISA busmaster DMA should not work on RISCserver (or other 
jazz derived machines) yet, since a necessary hook isn't called.

I should buy ISA busmaster adapter and ISA IDE card...
--
soda