Subject: Re: asc vs esp
To: Jonathan Stone <email@example.com>
From: Jason Thorpe <firstname.lastname@example.org>
Date: 01/21/1997 16:05:38
On Tue, 21 Jan 1997 14:53:18 -0800
Jonathan Stone <jonathan@DSG.Stanford.EDU> wrote:
> The chip in Decstations, Turbochannel Alphas, and (AFAIK) Macintosh
> systems, is an NCR 53c94, or some variant thereof.
> How is this an `Emulex SCSI processor'?
> Is there some shared ancestry between Emulex and NCR for this chip?
I guess Sun just used the Emulex chip, which is software-compatible
with the NCR 53c94. Actually, I'd heard the name was "Enhanced
SCSI Processor", similar to the "Advances SCSI Controller" name
used by NCR... Whatever :-)
> This, btw, is part of the reason I don't like the 2940 et. al. driver
> being _the_ "ncr" driver. Why should that particular family of ncr
> products be `ncr', rather than, say, 53c9 drivers, or the ncr5380
Just to nit-pick, the 2940 is an "ahc" ... (aha = Adaptec Host Adaptor,
ahb = aha++, ahc = ahb++, I guess :-)
I agree, however, that calling the NCR 53c810 driver "ncr" is
inappropriate. It should be called "siop", since it's the
NCR SCSI I/O Processor.
Jason R. Thorpe email@example.com
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