i845GB MB progress

Adam Sulmicki adam at cfar.umd.edu
Fri Dec 17 14:11:00 CET 2004


>> forget post codes under linux. port 80 is used for io delays there.
>
> no kidding.
>
> and I was looking for some ready-to-use delay loop to hold stuff after
> using port 80.
>
> either way ended up using serial port

actually, is linux actually writing to those ports?

I have been here looking over an LK book and it mentions that the delay is 
being done by _reading_ only those ports, not writing.

It also mentions that jumps were used before. It would be worthwhile to 
re-examine the delays used in IDE driver in ADLO code. And change it to 
perhaps reading the port 0x80. It could potentially make it more reliable.



More information about the coreboot mailing list