[7737] in linux-scsi channel archive
Re: NCR53c875J or NCR53c875E?
daemon@ATHENA.MIT.EDU (Robert Johannes)
Mon Dec 20 15:10:01 1999
Date: Mon, 20 Dec 1999 12:58:00 -0600 (CST)
From: Robert Johannes <rjohanne@piper.hamline.edu>
To: Gerard Roudier <groudier@club-internet.fr>
Cc: linux-scsi <linux-scsi@vger.rutgers.edu>
In-Reply-To: <Pine.LNX.3.95.991220152316.1534A-100000@localhost>
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The reason I ask is because I want to know if there's a perfomance
difference between them. I've both the tekram DC390F (with the
"E" extension), and the fireport 40 (with the "J" extension), and I was
wondering if there's a perfomance difference between the two
controllers. Do you know?
Robert
On Mon, 20 Dec 1999, Gerard Roudier wrote:
>
> On Mon, 20 Dec 1999, Robert Johannes wrote:
>
> > Gerard,
> > Do you know which one of these Symbios chipsets is the latest? The one
> > with a "J" or the one with an "E"?
>
> "E" probably, but the chip revision id should be a more accurate info.
>
> - E means that the device supports power management features (not used for
> now under Linux).
> - J means that is supports JTAG
> - N means JTAG support but not big-endian mode that is a never used
> feature, I think.
> - B addresses the package (208 pin plastic versus 169 blah blah ...)
> - Etc ... I don't know the meaning about the other 22 possible letters.;-)
>
> Things like J, JB, E, JE, JBE, ... exists.
>
> The relationship between chip revision and actual chip type may just not
> exist. I remind having asked Pamela Delanney from LSI LOGIC a couple of
> months ago, but it was hard for her to gather the information.;) Further
> sym/ncr driver versions will display 875 for everything that incorporates
> one or two 875 cores, for simplicity and in order not to output wrong
> info.
>
> Gérard.
>
>
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