I wrote:

> I've committed some preliminary bus_dma(9) support for
> obio and (still MD) VME devices on both sun3 and sun3x.
> 
> It seems working on esp(4) on 3/80 and si at vme on TME (3/150),
> but if anyone can test si at obio on 3/60, please let me know
> how it goes.

Ah, there was a silly bug in si.c, so please try si.c rev 1.59 (or 1.60).
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Izumi Tsutsui