"Richard B. Johnson" wrote:
>
> On Thu, 25 Jan 2001, H. Peter Anvin wrote:
>
> > Matthew Dharm wrote:
> > >
> > > It occurs to me that it might be a good idea to pick a different port for
> > > these things. I know a lot of people who want to use port 80h for
> > > debugging data, especially in embedded x86 systems.
> > >
> >
> > Find a safe port, make sure it is tested the hell out of, and we'll
> > consider it.
> >
> > -hpa
> >
>
> You could use the DMA scratch register at 0x19. I'm sure Linux doesn't
> "save" stuff there when setting up the DMA controller.
>
Does that break the BIOS in any way, shape, or form? Again, someone gets
to make a patch and then test the hell out of it... and find the random
Olivetti which hooks the screen up to the A20M# signal and other weird
crap.
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Jan 31 2001 - 21:00:23 EST