Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64with MCP51 laptops
From: H. Peter Anvin
Date: Mon Dec 10 2007 - 19:32:17 EST
Rene Herman wrote:
By the way, David, it would be interesting if you could test 0xed. If
your problem is some piece of hardware getting upset at LPC bus aborts
it's not going to matter and we'd know an outb delay is just not an
option on your system at least. You said you could quickly reproduce the
problem with port 0x80?
I tried 0xED for a few versions (1.31-1.37) of SYSLINUX. It broke on a
lot of hardware (Phoenix BIOS uses 0xED by default, but BIOSes don't
have to work on arbitrary hardware.)
-hpa
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