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From: sagen@nucthy.physics.orst.edu (Milt Sagen)
Newsgroups: comp.sys.mac
Subject: Re: A few Deskjet+ observations
Message-ID: <10500@orstcs.CS.ORST.EDU>
Date: 10 May 89 00:59:51 GMT
References: <10452@orstcs.CS.ORST.EDU> <780003@hpvcfs1.HP.COM>
Sender: usenet@orstcs.CS.ORST.EDU
Reply-To: sagen@nucthy.PHYSICS.ORST.EDU (Milt Sagen)
Organization: Dept. of Physics, Oregon State University
Lines: 52

In article <780003@hpvcfs1.HP.COM> neff@hpvcfs1.HP.COM (Dave Neff) writes:
>>if, as some people have suggested in this group, there is no improvement 
>>in speed between the Deskjet and the Deskjet+ when run from a mac, then 
>
>This statement surprises me.  The DeskJet is not IO limitted at 19.2K baud
>but the DeskJet+ is IO limitted.  In fact, on a DeskJet using 9600 and

As my original posting stated this is what other people reported.  I've never
used a Deskjet.

>
>1) Is you printer driver optimized for the DeskJet/DeskJet+?  This
>means does it use data compression (mode 2)?  There are some

Can't say.  I would have thought the DataPak driver is, and I would not be
suprised if the Grappler LS were not as it fakes out the applications into
thinking its an IW LQ.

I've yet to test the HPDJ but the manual says it does use data compaction but
it does not say whether it is mode 1 or 2.  Would that matter?

>
>2) Are you printing some sort of page that does not compress well (like
>a scanned image)?  Like I said, mode 2 compression generally results

No.  I was printing some of the tech notes.

>in a 200K file versus the 1000K file of uncompressed graphics.  If it
>really took 7 minutes to print a page at 19.2 K baud it sure sounds
>like the data is uncompressed or does not compress well.
>
>3) You are using 19.2 K baud aren't you?  This is not the default
>BAUD rate of a DeskJet or DeskJet+.

Yes, switch 5 of bank 2 is up.

>
>Mac users might want to try a 57K baud to parallel conversion box when
>printing to a DeskJet+.

I have access to a conversion box though its max speed may be 9600, I'll have
to look, but all the drivers I've seen so far don't support speeds above 19.2.

Since, you are from HP Vancouver, I would like to make one complaint about
the Deskjet+, the sizes/pitches for the Courier font suck.  Why not at least
a 9 point Courier and/or 12 cpi pitch.


Milt Sagen                    Internet: sagen@nucthy.physics.orst.edu
Department of Physics
Oregon State University
Corvallis, OR  97331          Tele: (503) 754-4631