Re: Linux Post codes during runtime, possibly OT

Richard B. Johnson
2001-01-25T23:08:54Z

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.

Cheers,
Dick Johnson

Penguin : Linux version 2.4.0 on an i686 machine (799.53 BogoMips).

"Memory is like gasoline. You use it up when you are running. Of
course you get it all back when you reboot..."; Actual explanation
obtained from the Micro$oft help desk.