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From: neff@hpvcfs1.HP.COM (Dave Neff)
Newsgroups: comp.sys.mac
Subject: Re: LaserJet IIP Caveat
Message-ID: <780061@hpvcfs1.HP.COM>
Date: 26 Sep 89 21:34:01 GMT
References: 
Organization: Hewlett Packard, Vancouver, WA
Lines: 27

> Don't worry about the amount of memory the IIP contains. Our DeskJet
> has only 16K of memory and it prints out complete pages of graphics at
> 300 dpi using the MacPrint driver.
>
> The driver divides the QuickDraw image up into bands in your
> Macintosh's memory. It sends the bands to the printer one at a time,
> not all at once. With 512K of memory, it just means that the driver
> can dump that much into the printer before it has to wait for some of
> it to be printed before sending any more.

Not true.  The DeskJet does print graphics as it comes in so it does
not need extra RAM to do a page of graphics.  However all LaserJet
printers (and most all laser printers in general) MUST store up an entire
page of 300DPI graphics before it can start printing.  This is due
to the fact that the DeskJet/DeskWriter can assume graphics is coming
in sequentially down the page but laser printers allow for random
cursor positioning between graphics sequences and do not assume sequential
graphics.

You must have at least 1 Meg in a LaserJet IIP before printing a page
of 300 DPI graphics.  You need no extra RAM or options to print a page
of 300 DPI graphics on a DeskJet or DeskWriter.  People must be aware 
of this fact before doing a real comparison between the LaserJet and
DeskJet family printers.

Dave Neff
neff@hpvcfs1.HP.COM