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From: michaelv@iastate.edu (Michael L. VanLoon)
Newsgroups: comp.os.386bsd.development
Subject: Re: SCSI processor target mode implemented?
Date: 15 Apr 94 20:31:41 GMT
Organization: Iowa State University, Ames, Iowa
Lines: 41
Message-ID: <michaelv.766441901@ponderous.cc.iastate.edu>
References: <1994Apr13.133015.7424@unibw-hamburg.de> <CoB81n.4tD@world.std.com>
NNTP-Posting-Host: ponderous.cc.iastate.edu
In <CoB81n.4tD@world.std.com> hd@world.std.com (HD Associates) writes:
>In article <1994Apr13.133015.7424@unibw-hamburg.de>,
>Jens-Peter Akelbein <e_akel@unibw-hamburg.de> wrote:
>>I've the Adaptec 1542cf SCSI-Adapter. Does it support the target
>>mode? Is there anybody out there that has tried/implemented the
>>code for this adapter are another one?
>Adaptec DOES NOT SUPPORT TARGET MODE ON ANY OF ITS' HOST ADAPTERS.
>This is a Adaptec's formal position. They do not test it and they
>will not fix the firmware.
>I do not know of any PC SCSI board with a supported processor target
>mode. I've made quite a few calls without luck. If anyone locates
>such a board let me know.
My BusLogic bt742a/747s/etc. Technical Reference Manual has pages of
details on Target Mode operation. I don't know what BusLogic's
*official* stance on Target Mode is, but the Tech. Ref. Manual spends
just as much time talking about Initiator Mode as Target Mode. In
addition, my bt747s Installation Guide says in its Product Overview
section (discussing mailbox design):
... This same mailbox protocol supports both initiator and
target mode operation permitting high speed host-to-host
communication and scatter-gather data transfers.
I'd say, judging by the evidence, BusLogic has complete support for
Target Mode operation. Other BusLogic boards use an almost identical
firmware interface, leading me to believe all BusLogic products
potentially support Target Mode.
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Michael L. VanLoon Iowa State University Computation Center
michaelv@iastate.edu Project Vincent Systems Staff
Free your mind and your machine -- NetBSD free Un*x for PC/Mac/Amiga/etc.
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