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From: se@fileserv1.MI.Uni-Koeln.DE (Stefan Esser)
Newsgroups: comp.os.386bsd.development
Subject: Re: Where to buy NCR 810 PCI SCSI cards?
Date: 18 Sep 1994 20:24:30 GMT
Organization: Institute of Nuclear Physics, University of Cologne, Germany
Lines: 43
Distribution: world
Message-ID: <35i7luINNg88@rs1.rrz.Uni-Koeln.DE>
References: <199408172054.PAA07862@MindBender.HeadCandy.com> <356m8j$n1f@nntpd.lkg.dec.com> <MICHAELV.94Sep14133142@MindBender.HeadCandy.com> <35ahfqINN15u8@rs1.rrz.uni-koeln.de> <35ge0p$d9l@news.u.washington.edu>
NNTP-Posting-Host: fileserv1.mi.uni-koeln.de
In article <35ge0p$d9l@news.u.washington.edu>, tzs@u.washington.edu (Tim Smith) writes:
|> Speaking of NCR host adaptors, someone should see if NCR is willing to
|> release the interface to the SDMS BIOS. If they would, it would greatly
|> simplify supporting all NCR host adaptors under {Free,Net}BSD.
Does SMDS support host adapters with
other NCR chips than the 53c810/53c825 ?
If it doesn't then don't bother ...
(BTW: The Linux NCR driver needs SMDS to
operate, don't know which functions the
driver actually calls, and which have
been implemented in SCRIPTS programs in
the driver. But I know the driver doesn't
completely relie on SMDS, ie. it contains
SCRIPTS code that makes it 53c700/800
specific.)
|> Anyway, if NCR would release the interface documents for this code, then
|> one could write a single driver that would work with all present and
|> future systems that contain the SDMS BIOS.
Yes. But I wouldn't expect such a driver to
offer the same performance as the current
driver!
Does SMDS support Tagged Command Queues ?
It is not easy to provide universal SCSI BIOS
functions without adding a lot of complexity
and overhead (IMHO).
But SMDS is a very good thing for the primary
and secondary boot strap, where performance
isn't everything :).
--
Stefan Esser Internet: <se@ZPR.Uni-Koeln.DE>
Zentrum fuer Paralleles Rechnen Tel: +49 221 4706010
Universitaet zu Koeln FAX: +49 221 4705160
Weyertal 80
50931 Koeln