>> Coool!   Let make sane the am7930 driver so as it can work interchangably
>> between any of SPARCstation, Personal DECstation and TC Alpha.
>
> Okay.  I have just finished cleaning up the code.  I have made it
> available at:
>
> http://www.sprc.qut.edu.au/~mcgarry/netbsd/

Excellent!  It's what I wanted to see for long time.

> I haven't tested it on NetBSD/sparc or NetBSD/alpha.

I can do both.

> Have a look at the DMA buffer allocation.  Very creative, I reckon.
> What is the correct way to do it?

You mention to how to obtain constrainted memory regions for drivers,
right?  Please take a look at 'ioasic_lance_dma_setup()' in
'dev/tc/if_le_ioasic.c', it has to be cleaned anyway. 

Tohru Nishimura