David Woodhouse wrote:
quoted text
> On Fri, 2008-01-11 at 09:35 -0500, David P. Reed wrote:
>   
>>   Using any "unused port" for a delay means that the machine check
>> feature is wasted and utterly unusable.
>>     
>
> Not entirely unusable. You can recover silently from the machine check
> if it was one of the known accesses to the 'unused port'. It certainly
> achieves a delay :)
>   
I'm sure that's what the driver writers had in mind.  ;-)

And I think we probably have a great shot at getting Intel, Microsoft, 
HP, et al.. to add a feature for Linux to one of the ACPI table 
specifications that define an "unused port for delay purposes" field in 
the ACPI 4.0 spec, and retrofit it into PC/104 machine BIOSes.  At least 
Microsoft doesn't have a patent on using port 80 for delay purposes. :-)




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