Messages in this thread | | | Date | Mon, 17 Dec 2007 19:54:58 +0100 | Subject | Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc. | From | Rene Herman <> |
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On 17-12-07 19:14, linux-os (Dick Johnson) wrote:
> Attached is a patch that changes the outs to ins on port 0x80.
No, that isn't useful. Only a write is "guaranteed" to make ISA/LPC meaning the timing for a read varies wildly. See the in/out cycles results posted earlier. Was also reading the Intel PIIX(3) chiset datasheet today which specifically mentions that only writes flow through to ISA, reads do not.
Rene.
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