Date   : Wed, 20 Oct 1982 09:36:00 PDT
From   : Mendelson.es@Parc-Maxc
Subject: Re: Diablo 630 Printer

Rick,

I believe that you will find that your 630 does not contain an option known as
the Expanded Communications Set Option.  The following is quoted from my
copy of the Model 630 Communications Terminal Operators Guide, Document No.
90445-03 (1/82), page 20):

"Expanded Communications Set Option (Fully Featured HPRO5)
This option includes several features which significantly increase the
flexibility,
capacity and capability of the Model 630:

Word Processing Enhancements:  These consist of several features which allow
the operator to control the printout format from the keyboard using the ESC and
CTRL codes listed in the chart on pages 26 and 27.  Included are proportional
space printing, offset selection (character spacing), auto underscore, bold
overprint and shadow printing, auto center, auto justify, line edit and margin
control.

Expanded Memory:  
The print buffer (memory) is expanded to 2688 bytes (characters).

"Here Is . . ."  Answerback/NonVolatile Parameter Memory:  This capability is
supported by a small built iln battery which will maintain the data stored
in the
RAM (memory) during periods of power off.  The "Here Is . . ." message of up to
31 characters forms an automatic identification reply to enquiries from another
system.  The Parameter memory retains such items as margins, tabs, modes, etc.

HyPlot Vector Plotting:  This feature provides the capability to rapidly
produce
graphs and other vector designs, using commands listed in the chart on pages 26
and 27.  See the Product Description for details.

Remote Diagnostics:  This feature allows the interrogation of lmachine
parameters
and status thru the serial interface."

So -- why does the Xerox-customized version of WordStar work correctly, you
ask?  Well, because it generates these functions internally to WordStar
and does
not invoke them in the printer.  It does not assume that every printer
attached to
it can execute these functions.

See your friendly(?) Xerox salesman and order your Expanded Communications
Set Option now.  How's that for a commercial pitch, and I don't even work for
either the Diablo Division or the Office Systems Division of the company.
 I must
admit that I am a stockholder, however.

Hope this fully answers your questions.

Jerry Mendelson (Printing Systems Division, Xerox Corporation)