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gregg
Account closed
Registered: Apr 2005
Posts: 56 |
HSP/DMA delay and screen corruption
I'm currently experimenting with HSP/DMA delay e.g. horizontal scrolling with $d011. I'm doing it by switching on the DEN bit at the right time in line $30. So far, so good, but there's screen corruption in the first line:
It looks like the VIC doesn't fetch the correct color data. I don't understand why this is happening. Can anyone explain, please? And is it possible to avoid this? |
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JackAsser
Registered: Jun 2002
Posts: 2014 |
Quote: I'm not completely sure but I seem to be getting 40
https://ibb.co/R9wCj5m
at bottom "a" is at $0400.
but its running at vice 2.4 and not x64sc :)
Thanks Ozzie |
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serato
Registered: Feb 2021
Posts: 7 |
Quoting JackAsser…This will give two very crappy raster lines that of course depending on situation can be quite nightmarish to fix.
Huh, I only lose one line? e.g. vice-screen-2024052110335162.png |
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