From: Ross Biro <rossb@google.com>
To: Lionel Bouton <Lionel.Bouton@inet6.fr>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Andre Hedrick <andre@linux-ide.org>,
Teodor Iacob <Teodor.Iacob@astral.kappa.ro>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: UDMA 133 on a 40 pin cable
Date: Thu, 02 Jan 2003 14:40:20 -0800 [thread overview]
Message-ID: <3E14BFD4.7000909@google.com> (raw)
In-Reply-To: 3E14B698.8030107@inet6.fr
>
> #1 How is the 40/80 pin detection done at the hardware level ?
On the motherboard end of the 80 conductor cable, the connector shorts
one of the pins to ground (maybe pin 38). The ide controller just
checks to see if the pin is pulled low or not. Pulled low = 80 pin.
That's one of the reasons it's important to plug IDE cables in the
correct way.
Ross
next prev parent reply other threads:[~2003-01-02 22:33 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-02 18:29 UDMA 133 on a 40 pin cable Teodor Iacob
2003-01-02 19:37 ` Alan Cox
2003-01-02 18:59 ` Teodor Iacob
2003-01-02 19:21 ` Samuel Flory
2003-01-02 19:23 ` Teodor Iacob
2003-01-02 19:47 ` Samuel Flory
2003-01-02 20:37 ` Teodor Iacob
2003-01-03 2:26 ` Joshua Stewart
2003-01-02 22:00 ` Lionel Bouton
2003-01-02 22:40 ` Ross Biro [this message]
2003-01-02 22:42 ` Teodor Iacob
2003-01-03 1:04 ` Lionel Bouton
2003-01-03 1:57 ` Alan Cox
2003-01-03 10:20 ` IDE termination (was Re: UDMA 133 on a 40 pin cable) John Bradford
2003-01-03 10:29 ` Andre Hedrick
2003-01-02 23:24 ` UDMA 133 on a 40 pin cable Alan Cox
2003-01-02 22:45 ` Ross Biro
2003-01-03 1:15 ` Lionel Bouton
2003-01-03 16:14 ` Vojtech Pavlik
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