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From: kinsell@hpfcda.HP.COM (Dave Kinsell)
Newsgroups: comp.sys.hp
Subject: Re: Looking for SCSI for a HP9000/236CS
Message-ID: <4300001@hpfcda.HP.COM>
Date: Sun, 12-Jul-87 16:04:23 EDT
Article-I.D.: hpfcda.4300001
Posted: Sun Jul 12 16:04:23 1987
Date-Received: Fri, 17-Jul-87 04:37:55 EDT
References: <826@sdcc12.ucsd.EDU>
Organization: Hewlett-Packard, Fort Collins, CO
Lines: 21


>                                 It will not be mechanically compatible with
>Series 200, Model 310 or 320 machines (DIO-I backplane:  not fast enough to
>take advantage of SCSI).  Although a hardware hacker could probably jam it
>into a Model 236, the board won't be available in time for the fall semester.

DIO-I will run in excess of 2 meg/sec, which is quite adequate for the
large majority of SCSI applications.  In fact, many implementations are
limited to 1.5 meg/sec.  The on-track data rate of most Winchester
discs is even less than that.

If it is feasible to write drivers yourself, then a good option for
the hardware would be to add an interface chip like the NCR 5385
to the 98630A Breadboard interface.  I have it on very good authority
that this is easy to do.



Regards,                                              Hewlett-Packard
Dave Kinsell                                          3404 East Harmony Road
[ihnp4|hplabs]!hpfcla!d_kinsell                       Fort Collins CO  80525