Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- From: "H. Peter Anvin" <hpa@xxxxxxxxx>
- Date: Mon, 10 Dec 2007 17:25:08 -0800
David Newall wrote:
Where did the 8us delay come from? The documentation and source is careful not to say how long the delay is. Would changing it to, say 1us, be technically wrong? Is code that requires 8us correct?
I think a single ISA bus transaction is 1 µs, so two of them back to back should be 2 µs, not 8 µs...
-hpa
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