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Date: Sat, 18 Dec 2004 17:25:48 +0200
From: "Eli Zaretskii" <eliz AT gnu DOT org>
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In-reply-to: <41c40fe4$0$175$cc7c7865@news.luth.se> (message from Martin
	Str|mberg on 18 Dec 2004 11:09:24 GMT)
Subject: Re: Problems with timer interrupt chaining and SmartDrv
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> From: Martin Str|mberg <ams AT speedy DOT ludd DOT ltu DOT se>
> Date: 18 Dec 2004 11:09:24 GMT
> 
> Eli Zaretskii <eliz AT gnu DOT org> wrote:
> > It sounds like you are assuming that DMA is faster than PIO.  That was
> > so once, long ago, mainly with floppy drives, but is no longer true
> > since ATA interfaces conquered the PC land.  Nowadays, PIO is faster
> > than DMA, so AFAIK DMA is no longer used in disk I/O.
> 
> For DOS maybe, not for a multitasking system.

Do you mean DMA is used on multitasking systems?  Or do you mean PIO
is only faster on DOS, not on multitasking systems?

If the latter, please explain.