[comp.sys.amiga] Munched Sprites

lindam@sactoh0 (Linda C. Marquess) (08/10/89)

After finding scrambled sprites on three new games (shareware
Peter's Quest, Steinschlag and Compute!'s Arcade Volleyball, I
nearly panicked.  My A1000 is getting up there in years and I was
sure that my machine was going.  A friend told me that his 2000 did
same on those games.  Several hours of experimentation paid off.
The problem
was with my system-configuration saved with preferences 1.3 (the
same problem
happens with Potter's Preferences)!  I can use the 1.3 prefs if I
run it
before the game and click DEFAULT SETTINGS (then switch to 80
columns).
If I save the default settings and reboot, I still have scrambled
sprites.
I *HAVE* to run preferences before the game.  I suppose this could
be the
fault of "creative" programming techniques, but it seems that there
is a 
little critter in 1.3.




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lphillips@lpami.wimsey.bc.ca (Larry Phillips) (08/11/89)

In <1704@sactoh0>, lindam@sactoh0 (Linda C. Marquess) writes:
>After finding scrambled sprites on three new games (shareware
>Peter's Quest, Steinschlag and Compute!'s Arcade Volleyball, I
>nearly panicked.  My A1000 is getting up there in years and I was
>sure that my machine was going.  A friend told me that his 2000 did
>same on those games.  Several hours of experimentation paid off.
>The problem was with my system-configuration saved with preferences
>1.3 (the same problem happens with Potter's Preferences)!
> I can use the 1.3 prefs if I run it before the game and click
>DEFAULT SETTINGS (then switch to 80 columns).
>If I save the default settings and reboot, I still have scrambled sprites.
>I *HAVE* to run preferences before the game.  I suppose this could be the
>fault of "creative" programming techniques, but it seems that there is a 
>little critter in 1.3.

Two things...

1. Are you using a hard drive? If so, are you copying the system-configuration
   file to the DEVS directory on the boot disk? If not, it is only being
   changed in the assigned DEVS: directory.
  
2. Try moving the screne position a little to the left. This is a well known
   phenomenon that I first saw on 'MindWalker' sometime in '86.

-larry

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lindam@sactoh0 (Linda C. Marquess) (08/11/89)

My munched sprites were due to the screen being set, ever so
slightly to the left.  I tried changing ALL other values to their
defaults, one at a time, but the screen looked fine sooo...
The moral is, don't ignore the seemingly insignificant.

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