[1800] in linux-scsi channel archive
Re: 2940UW & scanjet
daemon@ATHENA.MIT.EDU (Andy Poling)
Sat May 3 02:19:38 1997
Date: Sat, 3 May 1997 02:15:17 -0400 (EDT)
From: Andy Poling <andy@realbig.com>
To: Brian Craft <bcboy@dorothy.wanglab.brandeis.edu>
cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <199705021716.NAA00784@dorothy.wanglab.brandeis.edu>
On Fri, 2 May 1997, Brian Craft wrote:
> Hi. Just got a ScanJet, which comes with that wacky little scsi board that
> everyone's been talking about. My machine has a 2940UW, but I notice in the
> documentation it doesn't say anything about connecting external 8 bit devices.
>
> There's an internal 50 pin port, but no external 50 pin port. Is there no way
> to connect 8 bit devices externally?
It is my understanding that the internal 50-pin port is only there for
backward compatibility with CDROMs etc. that don't commonly grok wide SCSI.
You could run a cable from the 50-pin port to a plate in the back panel, but
bear in mind that you *must* not use all three ports on the controller
simultaneously - you're only allowed to use a maximum of two ports at once.
Another "solution" (most would classify it a hack) is to use one of those
little wide-to-narrow adapter thingies. Be careful with it though, as you
can end up with the high 8 bits of your wide bus unterminated. Also those
adapters tend to look like a tee fitting which is a major-league no-no.
-Andy
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