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

Alan Cox
2007-12-14T15:24:20Z

On Thu, 13 Dec 2007 20:50:33 -0500
"David P. Reed" <dpreed@reed.com> wrote:

> Simulating 1 microsecond delays (assuming LPC meets that goal for 0x80)
> is "absolutely correct" for devices provided on PCI-X running on 3 GHz
> or greater machines?

Yes - the LPC bus clock doesn't change for the CPU clock.