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From: cdl@mplvax.ARPA (Carl Lowenstein)
Newsgroups: net.periphs
Subject: Re: Need Help with Cipher Microsteamer
Message-ID: <263@mplvax.ARPA>
Date: Tue, 11-Mar-86 13:58:24 EST
Article-I.D.: mplvax.263
Posted: Tue Mar 11 13:58:24 1986
Date-Received: Fri, 14-Mar-86 06:27:54 EST
References: <1206@mit-eddie.MIT.EDU>
Reply-To: cdl@mplvax.UUCP (Carl Lowenstein)
Distribution: net
Organization: Marine Physical Laboratory, UCSD
Lines: 18

In article <1206@mit-eddie.MIT.EDU> jbs@eddie.UUCP (Jeff Siegal) writes:
>I recently posted a request to net.unix-wizards about running a
>Cipher 880 (1600 bpi) tape drive on a Unix (4.3 BSD) VAX-11/750.
>
>The Cipher documentation indicates that the drive can operate at 25
>ips and 100 ips.  I don't see anywhere how one configures the drive to
>run at the higher speed.  Now it is running (and streaming) at what
>appears to be 25 ips.  How can I get it to go into 100 ips mode? 

The signals from the controller (host adapter) to the tape drive include
'IHISP' = High Speed Select. (Connector P2, pin 50).
Somehow, you must get your controller to assert this line.  Frequently
it is wired to bit 2 of the unit select, so that drive 4 becomes the
high-speed version of drive 0.  Look at the controller documentation,
and shudder at the thought of yet another /dev/rmtx.
-- 
	carl lowenstein		marine physical lab	u.c. san diego
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