As Ross Harvey scribbled...

> : From: Wilko Bulte <wilko@yedi.iaf.nl>
> : As Matthew Jacob scribbled...
> > Come on, that was 1994 when this was written. I've had lengthy discussions
> > with one of the fathers of Ultra SCSI and it seems to make a he* of a
> > difference how well you can design and produce your silicon. And control
> > your bus impedance, which gets us back to the cable issue.
> >
> > See www.symbios.com for the bus isolator chips. We can now do
> > 20 meters _single ended ultra scsi_ (though point to point only)
> > using these things. (we == DEC ^H^H^H Compaq storage division).
> 
> Elaborate contortions to make a bad interface work, membership on a spec
> committee, necessary legacy compatibility, and examples of dubious
> accomplishments have nothing to do with the fact that SE interfaces are
> now and will always be poor interfaces spec'ed by bad engineers or hostages
> to poorly chosen world standards. (Yes, I know, you guys don't really have
> a choice, just like Auspex didn't really have freedom to choose.)
> 
> Signal integrity just wasn't well understood in the small computer world when
> SCSI was thought up.
> And in fact, after we went to the 68-pin connector for wide drives,
> differential wasn't even intrinsically more expensive, the cost difference
> was purely from volume issues, the world having chosen the wrong standard.

The world still does. See IDE for an example. Or DAT drives or...

Groeten / Cheers,
Wilko
_     ______________________________________________________________________
 |   / o / /  _  				Arnhem, The Netherlands
 |/|/ / / /( (_) Bulte 				WWW  : http://www.tcja.nl
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