Re: VGA PCI IO port reservations

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Fri Nov 17 2000 - 12:30:31 EST


> And I can definitely say that if you don't allow access to these "extended"
> VGA ports, BIOSes either enter infinite loops or else terminate without

PCI cards also exist that snoop the ISA bus. Several cards snoop the PCI
transactions that eventually go on to the ISA bus in order to emulate ISA bus
DMA

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