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From: rjn@hpfcla.UUCP
Newsgroups: net.graphics
Subject: Re: Info wanted on HP7221A plotter
Message-ID: <34000001@hpfcmp.UUCP>
Date: Sun, 15-Dec-85 03:11:00 EST
Article-I.D.: hpfcmp.34000001
Posted: Sun Dec 15 03:11:00 1985
Date-Received: Thu, 19-Dec-85 03:57:14 EST
References: <133@grpthry.UUCP>
Organization: 15 Dec 85 01:11:00 MST
Lines: 16

re: "(I have been informed that HP7221A actually talks HPGL.)"

The  7221A/B/C/S/T  talk a unique  escape-sequence  language called "compact
binary",  designed for efficient data transfer on slow async lines.  For the
7221C/T  version (the "S" and "T" had  roll-feed),  there was (and may still
be) a kit to convert it to HP-GL.  Basically  the kit converts the 7221 to a
7220  [HP-GL].  I don't know if the kit would work in a 7221B/S.  I doubt if
it would work in a 7221A.

Regards,                                              Hewlett-Packard
Bob Niland                                            3404 East Harmony Road
[ihnp4|hplabs]!hpfcla!rjn                             Fort Collins CO  80525

This response does not represent the official position of the  Hewlett-Packard
Company.  The above data is provided for  informational  purposes only.  It is
supplied without warranty of any kind.