> >The reason that vsbus was invented was to hold resources; merely
> >which part of the DMA area that is allocated for what and to 
> >lock the registers for simultaneous access. If this can be done
> >with the bus_* code, good! I don't know enough about this.
> >Otherwise there must be some way to keep the bus resources for 
> >both the VS3100 and VS4000. The VS4000 map reg implementation is
> >much more like the Unibus and can maybe be forced to share the
> >same resource keeping scheme.
> 
> That would be handled by the bus_dma infrastructure.  I plan on
> modeling the VS4000 sgmap after the Alpha PCI sgmap code.
> 
Great! Sounds perfect!

-- ragge