Hi all,
[snip]
>
> > A list of I/O adresses should not be that much of a problem, DMA
> >
> > transfers are another story. Anyway, if you are interested, i'll
> >
> > prepare a list from the NetBSD sources.
> >
>
> The DECstations don't use DMA, IIRC ... the SCSI and Ethernet controller
>
> have their own little buffer RAM areas, the R3000 is responsible for all
>
> memory transfers ...
>
>
Michael, i'm afraid that is not fully correct. AFAIK all Turbochannel
DECstations except the 5000/200 have an IO-ASIC on board which
supports DMA-Channels for the SCSI, Ethernet and even the serial
ports. These machines have no RAM buffers. But remember, this is
second if not third hand information, so take it with a grain of
salt.
> regards,
>
> Michael Engel (engel@unix-ag.uni-siegen.de)
--
regards, Harald.
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