Re: Incorrect UDMA timing on VIA vt82c596b

From: Andre Hedrick (andre@linux-ide.org)
Date: Fri Oct 13 2000 - 01:01:27 EST


On Tue, 10 Oct 2000, Vojtech Pavlik wrote:

> On Tue, Oct 10, 2000 at 12:20:07PM -0400, Mark Hahn wrote:
>
> > > Btw, reading the ATA/ATAPI-6 specs I think UDMA66 should work on a
> > > setup where would be just one drive and a really short, 40-wire cable
> > > without problems as well. I've even seen systems shipped like that.
> >
> > uh, what part of the spec leads you to that conclusion?
> > I've haven't seen a draft more recent than ~1h2000, but
> > they've been unambiguous about absolutely requiring
> > 80-conductors for >= ata66, and that two-connector cables
> > must be 5<=l<=18, and three-connector cables 10<=l<=18.
>
> ATA/ATAPI-6 draft rev. 0a, page 14 (sheet 28 of 404), table 2, row 4,
> column 1, plus comment 4 in the same table.
>
> And from the engineering point of view, it seems reasonable, too.

Hi Mark,

This is the stuff that is not clearly drafted the shews.
You need the stuff I am forwarding to get the twist.
Less the kernel list.

Cheers,

Andre Hedrick
The Linux ATA/IDE guy

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