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Majikeyric
Registered: Sep 2002
Posts: 83 |
Weird graphics glitches with a SCPU program
Hi coders,
I'm actually working on a game engine for SCPU (yes there are crazy people ;)
the following video shows a bitmap scrolling with the Aladdin character made of sprites, I can't understand why there are those glitches in the bitmap (when there are no sprites on screen, there are no more glitches..).
https://www.youtube.com/watch?v=dAgFAMAYiyA
Did some of you already experience that problem ???
Is it VIC-II or SCPU related ??? |
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Oswald
Registered: Apr 2002
Posts: 5017 |
looks like a timing problem in your code, exactly when middle gray raster line on border shows up the glitch occurs. maybe you copy new data into bitmap while its being shown ? |
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AmiDog
Registered: Mar 2003
Posts: 97 |
The usual suspect when I have weird issues when doing SCPU coding, is that I've forgotten to switch the CPU to 8bit accumulator when accessing the IO area and thus end up overwriting a register I wasn't supposed to be touching :-) |
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Thunder.Bird
Registered: Nov 2003
Posts: 109 |
Maybe it has something to do with your previous SCPU Problem?
https://www.youtube.com/watch?v=Qqs_XYEsbvY
Also check PSU and PLA |
