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From: mark@hpcpbla.HP.COM (Mark Simms)
Newsgroups: comp.periphs.printers
Subject: Re: Deskjet add-on memory: any improvements for graphics speed?
Message-ID: <9930002@hpcpbla.HP.COM>
Date: 13 Mar 91 14:27:29 GMT
References: <1034@caslon.cs.arizona.edu>
Organization: HP Computer Peripherals Bristol, UK
Lines: 25

All the printers in the DeskJet series print graphics a line at a time
as the data is received.  The graphics are not bufferred anywhere.  As
such extra RAM is of no benefit.  As a result, all DeskJet printers can
print 300dpi graphics without additional RAM.

The additional RAM is solely for the storing of down loaded fonts.  It
is of no use for printing graphics.  If you do not down load fonts, then
do not buy extra RAM.

This is one of the major cost savings of a DeskJet over a laser printer.
Since a laser printer must buffer a whole page, then it requires a
megabyte of RAM to print a single page 300dpi bit map.

Mark Simms

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Opinions expressed are my own and are not intended to be an official
statement by Hewlett-Packard Company
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Name:         Mark Simms
Profession:   Software Engineer
Occupation:   Research and Development
Organization: Hewlett-Packard Computer Peripherals Division
Unix-mail:    mark%hpcpbla@hplb.hpl.hp.com
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