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From: gersh@aplvax.jhuapl.edu (John R. Gersh)
Newsgroups: comp.sys.mac
Subject: Re: MacDraw II Problems ...
Summary: Need a screenful of memory/document
Keywords: MacDraw II, Bugs ?
Message-ID: <3729@aplcen.apl.jhu.edu>
Date: 9 Nov 89 14:54:45 GMT
References: <6167@tank.uchicago.edu> <421@tci.bell-atl.com>
Sender: news@aplcen.apl.jhu.edu
Reply-To: gersh@aplvax.jhuapl.edu.UUCP (John R. Gersh)
Distribution: usa
Organization: The Johns Hopkins University Applied Physics Laboratory
Lines: 39

In article <421@tci.bell-atl.com> Matt Kingman writes:
>
>Here's an intersting twist.  I have a IIx with 4MB and have had no problems
>running MacDraw II.  The other day I added an second monitor to the system
>and I now get the "Not enough memory to open a new document" error when I'm
>running with multifinder.  With finder, I can run with 1 or 2 monitors.
>Weird......
>


MacDraw II reserves a screenful of memory for a pixel map of each open
document. On a Plus or SE with a 512 by 342 by one-bit (B&W) screen,
that's only about 22K bytes; on an Apple 13" color monitor, with 8-bit
color selected, that's 640 by 480 by 8 bits, or about 300K bytes per
open document. A typical 19" color monitor, again at 8-bit color,
will make MacDraw II need almost 800K bytes per open document. 

There are two ways to deal with this - (1) Increase the application
memory allocation for MacDraw II under Multifinder. (2) Reduce the number 
of colors used by the monitors (in the Monitor cdev); most MacDraw work is B&W
anyway, and it actually uses at most 8 colors.

Interestingly, I posted a note on this subject here about a year ago,
just after MacDraw II came out. I had an immediate e-mail reply from a 
Claris engineer on the subject. We agreed that the MacDraw manual was
inadequate in discussing this memory requirement topic. The manual
addendum that came out with MacDraw II v 1.1 has a full explanation of
the situation. Nice going Claris!!

							- John Gersh





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