Re: [PATCH] parport_pc.c PnP BIOS sanity check

Alan Cox (alan@lxorguk.ukuu.org.uk)
Fri, 21 Sep 2001 13:07:42 +0100 (BST)

> therefore a value of 0 is representative of no value whatsoever.

This has been unsafe since about 1995, when DMA 0 became available as PC's
stopped using the ISA DMA engine for memory refresh (a very neat original PC
hack)

Alan
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