Re: More info on port 80 symptoms on MCP51 machine.

Alan Cox
2007-12-12T21:36:26Z

> One wonders if it does some SMM trick to capture port 0x80 writes and
> attempt to haul them off for debugging; it almost sounds like some kind
> of debugging code got let out into the field.

Not implausible. We've got a bug I've been dealing with where a vendor
left debug stuff enabled via the parallel port and which clearly
"escaped" from the test environment to the BIOS proper.