Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!cs.utexas.edu!usc!henry.jpl.nasa.gov!elroy.jpl.nasa.gov!gryphon!pnet02!lampi
From: lampi@pnet02.gryphon.com (Michael Lampi)
Newsgroups: comp.sys.apollo
Subject: Re: 16-bit parallel strobed I/O and you
Message-ID: <24319@gryphon.COM>
Date: 5 Jan 90 21:01:33 GMT
Sender: root@gryphon.COM
Organization: People-Net [pnet02], Redondo Beach, CA.
Lines: 15

The DR-11W protocol is an 'industry-standard' means for bidirectional 16 bit
data transfer between two electronic systems (not necessarily computers).

It has NO data-related protocols, just a couple of handshake lines to indicate
data availability and direction. If you were to think of the absolute minimum
number of signals required for such a mechanism, you would end up with the
same number of control lines as the DR-11W (six, if I remember correctly).

Best of all, you don't have to use them all if you aree unidirectional.

Michael Lampi               MDL Corporation   213/782-7888   fax 213/782-7927

UUCP: {ames!elroy, <routing site>}!gryphon!pnet02!lampi
INET: lampi@pnet02.gryphon.com
"My opinions are that of my corporation!"