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.

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