Thread: Copper timing
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Old 21 July 2008, 18:24   #20
Toni Wilen
WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 45
Posts: 23,653
Originally Posted by yaqube View Post
I think it's because the blitter has lower priority than the copper and the bitplane dma has the highest. That's why the copper can steal this cycle from the blitter.

The "blitter-nasty" mode keeps only the CPU off the bus, not the copper.
Yes but the point is that copper does not need that cycle for anything but it still "steals" it if it is available. But you are right, it most likely depends on dma priority levels.
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