Messages in this thread |  | | Date | Fri, 21 Sep 2001 02:11:15 -0400 (EDT) | From | Ignacio Vazquez-Abrams <> | Subject | Re: [PATCH] parport_pc.c PnP BIOS sanity check |
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On Fri, 21 Sep 2001, Thomas Hood wrote:
> I'm still wondering why this function in parport_pc.c rejects dma > values of zero. Is DMA0 not usable by the parallel port for some > reason? I should think that if the PnP BIOS returns a dma of zero > then it means that the parallel port is using DMA0. Sorry if I'm > being obtuse. // Thomas Hood
DMA0 is reserved for memory refresh. It _can't_ be used for anything else, therefore a value of 0 is representative of no value whatsoever.
-- Ignacio Vazquez-Abrams <ignacio@openservices.net>
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