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From: dlyons@Apple.COM (David A. Lyons)
Newsgroups: comp.sys.apple
Subject: Re: memory
Message-ID: <37441@apple.Apple.COM>
Date: 20 Dec 89 21:56:01 GMT
References: <8590.net.apple@pro-lep>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 31

In article <8590.net.apple@pro-lep> j_p@pro-lep.cts.com (Jason Perez) writes:
>I've got a small program that will display 320x200 $C1(uncompressed)
>pictures from Prodos 8 ( got it from Incider).  I've modified it so it will
>search a pathname and get all the type $C1 pictures and then put them into an
>array.  Before doing any displaying I printed out the entire array and it
>contained about 250+ files (from a Vulcan).  Then I entered the loop to
>display all the files one at a time.  The program works up to around the 43rd
>pictures, then crashes.  I printed out the variable in question and it was all
>hosed up(garbage characters).  What's the problem, is it memory?  I've got a
>ROM 01 GS w/ 3Megs of RAM.

It sounds like your program is in Applesoft and is not managing memory
properly--it works "by accident" until your string garbage grows down far
enough to collide with some memory you're using down below.  Are you
BLOADing anything into bank 0?  If so, I recommend putting your Applesoft
program *above* the area you'll be BLOADing into, something like this:

0  N=64 :
   IF PEEK(104)<>N THEN
        POKE 104,N :
        POKE 256*N,0 :
        PRINT CHR$(4);"RUN MYPROGRAM"
-- 

 --David A. Lyons, Apple Computer, Inc.      |   DAL Systems
   Apple II Developer Technical Support      |   P.O. Box 875
   America Online: Dave Lyons                |   Cupertino, CA 95015-0875
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   My opinions are my own, not Apple's.