Re: Memory and printing

1997-11-19 Thread Paul Huygen
 Hamish Moffatt <[EMAIL PROTECTED]> wrote that Paul Huygen
<[EMAIL PROTECTED]>  wrote:

> I do almost everything with LaTeX via Postscript (Ghostscript). When I
> bought an HP LJ5 printer with 1 Mb of memory I soon discovered that
> that amount of memory was utterly insufficient for even simple text
> pages. So I added 4 Mb of memory (to a total of 5 Mb), and since then I
> have never had any problem, even with the most complicated graphics.

and then Hamish asked:

>Is that a straight LaserJet 5? Like Ben I have the 5L and have
>never run out of memory printing (at 300dpi), either direct PCL stuff
>from Windows or conversions from ghostscript.

Yes, it is a straight LaserJet 5L. However, I find 600dpi much more
beautiful than 300dpi. Therefore I use the printer at 600dpi, which
costs app. 4 times as memory as 300dpi does. Furthermore, I presume
that at least Windows uses the fonts that are built into the
printer which is economical. Standard LaTeX however, uploads it own
fonts to the printer and this adds to the memory consumption of course.

Regards,

Paul Huygen
[EMAIL PROTECTED]


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Re: Memory and printing

1997-11-19 Thread Torsten Hilbrich
"G. Kapetanios" <[EMAIL PROTECTED]> writes:

> Hi,
> 
> I am thinking of bying a laser printer but I have one question. I
> will be printing some large documents with lots of graphics in
> them. The files will have the postscript format. For example one
> file I recently printed was 6.2 Mb. The cheapest laser printer is HP
> 6L with 1 Mb of memory. Does this mean I will not be able to print
> my files which are larger than 1 Mb? Or doesn't it matter as long as
> my computer memory is large enough ?  Any hint will be appreciated.

The printer will be unable to print *pages* which pixels (as provided
by Ghostscript) will not fit in memory.  If you have 10 pages, each
needing about 600k, you only need 600k for printing them as the pages
are discarded from memory as soon they are printed.

I suggest you purchase an additional 4MB JEIDA memory expansion card
(about DM 100 = $ 56), don't buy the original from HP as it is much
more expansive.  They are also available with 1MB, 2MB, and 8MB in
size.

When I had the original 1 MB memory in my Laserjet 5L (very similiar
to your model) I had problems printing some pages with a lot of text
(e.g. a2ps double-sided), the printer was unable to compress this
information to fit in 1 MB and left out some pixel (it did not even
switched to 300dpi).

The additional memory will also allow you to use download-fonts (is
this supported by ghostscript?) and buffer some pages.

Torsten

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Re: Memory and printing

1997-11-18 Thread Hamish Moffatt
On Tue, Nov 18, 1997 at 09:30:01PM +0100, Paul Huygen wrote:
> "G. Kapetanios" <[EMAIL PROTECTED]> wrote:
> >Does
> >this mean I will not be able to print  my files which are larger than 1
> >Mb? Or doesn't it matter as long as my computer memory is large enough ?
> >Any hint will be appreciated. 
>
> I do almost everything with LaTeX via Postscript (Ghostscript). When I
> bought an HP LJ5 printer with 1 Mb of memory I soon discovered that
> that amount of memory was utterly insufficient for even simple text
> pages. So I added 4 Mb of memory (to a total of 5 Mb), and since then I
> have never had any problem, even with the most complicated graphics.

Is that a straight LaserJet 5? Like Ben I have the 5L and have
never run out of memory printing (at 300dpi), either direct PCL stuff
from Windows or conversions from ghostscript.


Hamish
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Student, computer science & computer systems engineering.3rd year, RMIT.
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Re: Memory and printing

1997-11-18 Thread Paul Huygen
"G. Kapetanios" <[EMAIL PROTECTED]> wrote:
>Does
>this mean I will not be able to print  my files which are larger than 1
>Mb? Or doesn't it matter as long as my computer memory is large enough ?
>Any hint will be appreciated. 
   
I do almost everything with LaTeX via Postscript (Ghostscript). When I
bought an HP LJ5 printer with 1 Mb of memory I soon discovered that
that amount of memory was utterly insufficient for even simple text
pages. So I added 4 Mb of memory (to a total of 5 Mb), and since then I
have never had any problem, even with the most complicated graphics.

Regard,

Paul Huygen
[EMAIL PROTECTED]


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Re: Memory and printing

1997-11-18 Thread Ben Pfaff
Ted Harding <[EMAIL PROTECTED]> writes:
> Is there not a version of the 5L which can be obtained with a true
> PostScript option installed?

No.  You have to upgrade to a 6MP.  The 6L is $399 (maybe less); the
6MP is $850 (maybe more).
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Re: Memory and printing

1997-11-18 Thread Ted Harding
On 18-Nov-97 Ben Pfaff wrote:
> Though everything that Ted says is true, I must note that an HP 6L is
> not a PostScript printer.  I have a 5L at home with 1 MB memory and
> can say that, under PCL, that that is enough memory to printer
> anything but the most complex graphics at 600 dpi and I haven't found
> a page yet that failed to print at 300 dpi.

True enough, no doubt. But please note that what I wrote was intended to be
read in two parts: one about RAM requirements for PostScript printers
proper, the other about printing PS to non-PS printers for which a
pre-converter (e.g. ghostscript, raw or as wrapped in ghostview) is
required.

In the latter case, the printer's RAM for native printer code (e.g.
PCL) should be adequate for a page at a time. Ben's comments confirm this
for the 5L.

With PS printers, on the other hand, it's a different story since PS is a
fully-fledged programming language which is quite capable of piling very
large chunks of data onto stacks. Hence the need to be alert to RAM demands
in this case.

Is there not a version of the 5L which can be obtained with a true
PostScript option installed?

Best wishes,
Ted.


E-Mail: Ted Harding <[EMAIL PROTECTED]>
Date: 18-Nov-97   Time: 17:46:36



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Re: Memory and printing

1997-11-18 Thread Ben Pfaff
Though everything that Ted says is true, I must note that an HP 6L is
not a PostScript printer.  I have a 5L at home with 1 MB memory and
can say that, under PCL, that that is enough memory to printer
anything but the most complex graphics at 600 dpi and I haven't found
a page yet that failed to print at 300 dpi.

Ted Harding <[EMAIL PROTECTED]> writes:
> On 18-Nov-97 G. Kapetanios wrote:
> > I am thinking of bying a laser printer but I have one question. I will be
> > printing some large documents with lots of graphics in them. The files
> > will have the postscript format. For example one file I recently printed
> > was 6.2 Mb. The cheapest laser printer is HP 6L with 1 Mb of memory. Does
> > this mean I will not be able to print  my files which are larger than 1
> > Mb? Or doesn't it matter as long as my computer memory is large enough ?
> > Any hint will be appreciated. 
> With a PostScript printer what matters is that the printer memory is large
> enough to hold the information required to compose 1 page, plus any
> "global" PS code which the file requires. For a page consisting mainly of
> text which only calls for the fonts that come with the printer, the page
> requirement is only a few KB and there's no problem.
[...]
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RE: Memory and printing

1997-11-18 Thread Ted Harding
On 18-Nov-97 G. Kapetanios wrote:
> I am thinking of bying a laser printer but I have one question. I will be
> printing some large documents with lots of graphics in them. The files
> will have the postscript format. For example one file I recently printed
> was 6.2 Mb. The cheapest laser printer is HP 6L with 1 Mb of memory. Does
> this mean I will not be able to print  my files which are larger than 1
> Mb? Or doesn't it matter as long as my computer memory is large enough ?
> Any hint will be appreciated. 
>  Thanks
>  George 

Hi George,
With a PostScript printer what matters is that the printer memory is large
enough to hold the information required to compose 1 page, plus any
"global" PS code which the file requires. For a page consisting mainly of
text which only calls for the fonts that come with the printer, the page
requirement is only a few KB and there's no problem.

If you have graphics, or if you're downloading the font
definitions on the fly (as with TeX), then there are much greater
demands on printer memory. If you have a lot of graphics, then almost
certainly 1MB is not enough. 2MB is probably enough most of the time but
may sometimes be inadequate. 4MB is almost certainly adequate. As a general
rule, you can print PS files which are overall very big, provided you don't
exceed the printer's RAM for each page.

On the other hand, you can print PS on a non-PS printer provided you run a
PostScript->whatever interpreter on your conputer: this generates native
printer code, and all that is needed is that the printer can accomodate
whatever native code is required for each page (as it should, or take it
back). The computer can carry the burden of composing the page before
sending the native code to the printer. One possibility is ghostscript, but
this tends to suffer from font-rendering problems and can give disappointing
results if you need good-looking hard copy.

Hope this helps,
Ted.


E-Mail: Ted Harding <[EMAIL PROTECTED]>
Date: 18-Nov-97   Time: 12:40:17



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Memory and printing

1997-11-18 Thread G. Kapetanios

Hi,

I am thinking of bying a laser printer but I have one question. I will be
printing some large documents with lots of graphics in them. The files
will have the postscript format. For example one file I recently printed
was 6.2 Mb. The cheapest laser printer is HP 6L with 1 Mb of memory. Does
this mean I will not be able to print  my files which are larger than 1
Mb? Or doesn't it matter as long as my computer memory is large enough ?
Any hint will be appreciated. 
 Thanks
 George 


---
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Churchill College
Cambridge, CB3 0DSE-Mail: [EMAIL PROTECTED]
U.K.  WWW: http://garfield.chu.cam.ac.uk/~gk205/work_info.html
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