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From: charles@hpcvca.CV.HP.COM (Charles Brown)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Apple SCSI not compatible with standard SCSI?
Message-ID: <1410036@hpcvca.CV.HP.COM>
Date: 30 Nov 89 01:44:50 GMT
References: <ANDREWT.89Nov13165620@watsnew.waterloo.edu>
Organization: Hewlett-Packard Co., Corvallis, Oregon
Lines: 20

>      Hummm.  I am in the process of hacking together a 50pin-to-25pin
> connector for a StarDrive I recently got.  The target drive (my
> roomate's) is a miniscribe 8425S.  Is this drive differential?

No.  SCSI is not differential.  It merely (most of the time)
interdigitates signals and grounds in the 50 wire ribbon cable.
Sort of a poor man's differential drive.

> If not, how often is differential drive used in the REAL world?  I
> have a feeling that this would only be used on  really high-end
> drives, much as professional audio uses balanced connectors, and
> consumer stuff only uses single-ended.
>                Dave Williams
>                  dawill@hubcap.clemson.edu

Rarely.  Don't worry about it.
--
	Charles Brown	charles@cv.hp.com or charles%hpcvca@hplabs.hp.com
			or hplabs!hpcvca!charles or "Hey you!"
	Not representing my employer.