On Fri, 27 Feb 1998, Michael R Zucca wrote:

> > There were some issues relating to interrupt priority.  I recall a concern
> > being expressed that putting the mace (av-motherboard) ethernet driver at
> > high-enough priority to get full performance might impact the serial port
> > interrupt response.  I really can't speak to the details.  Allan Briggs or
> > Bill Studenmund (or our portmaster Scott, of course) might know how it all
> > settled out.

Not me said the flea. I have no clue what the interupt levels are in this
case.

> Well, if I remember right the AV's are also capable of doing serial DMA. So
> perhaps if Bill feels up to it... :-) I think it's pretty cool that we
> managed to get DMA ethernet into the kernel so fast.

Well, since I don't have a machine to test on... It'll be hard. Also, the
Serial DMA I've seen is DUMB. There's only one DMA channel AFAICT. So you
can do DMA receive or DMA transmit, but not both. :-(

Take care,

Bill