Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!cncst
From: cncst@unix.cis.pitt.edu (Christophe N. Christoff)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Compatibility: Laserjet II, II/D, III?
Keywords: BITMAP GRAPHICS, MEMORY
Message-ID: <26370@unix.cis.pitt.edu>
Date: 31 Jul 90 17:24:40 GMT
References: <3964@rex.cs.tulane.edu>
Reply-To: cncst@unix.cis.pitt.edu (Christophe N. Christoff)
Distribution: usa
Organization: Univ. of Pittsburgh, Comp & Info Services
Lines: 30

From what I understood, PCL4 and PCL5 is not compatible, especially
in bitmapped graphics mode.  (My information might be wrong, since I
cannot test HP III's, I do not have access to it)

Here is an interesting phenonema for HP fans:

I wrote a program to print document with HP II's. The document basically
contains a mixture of ASCII letter and bitmapped graphics inoformation.
for example, you dynamically define ASCII "A" stands for a flag, "B" for
a dog, .... and then a paragram of such combination for reader to 
reserve overyone.  In other word, the document is really messed up with
ASCII and graphics information.

The phenomena:

Using standard line spacing (6 lines/inch), after printing about 20 lines,
HP II's give memory problem and halt, so I have to reset.
Using 4 lines/inch, I can print very lengthy document (say 20 pages) without
any trouble. That is 40 lines per page!

Even I have a document which is only 30 lines long, the above phenomena
still exists.

What goes wrong? I do not think it is a memory problem even though it 
indicates so. 

The above number might not be exact, but the problem is well illustrated.
Does HP II's has something to limit number of graphics per unit area?

Any hint/help/advice is appreciated.