Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops

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On 11-12-07 17:32, John Stoffel wrote:

Here's my results on a PIII Xeon, 550mhz, 440GX chipset, and an ISA
slot, which until recently was actually used with an 8 port serial
card:

jfsnew:~/src> sudo ./port80
out: 729
in : 348
jfsnew:~/src> sudo ./port80
out: 729
in : 354
jfsnew:~/src> sudo ./port80
out: 729
in : 350
jfsnew:~/src> sudo ./port80
out: 728
in : 346
jfsnew:~/src> sudo ./port80
out: 730
in : 340

Thank you. That's a little odd. The "in" time should be close to the "out" time really.

Well, err, <shrug> I guess.

For now noone's contemplating replacing the out with an in anyways :-)

Rene.

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