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Old 17 January 2016, 14:38   #4
Toni Wilen
WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 43
Posts: 20,627
I checked using DMA debugger.

It is COPJMP condition's extra cycle that does not need to be free. If it happens during "not available for copper" cycle, COPJMP executes 1 copper cycle (2 color clocks) faster (vs any normal copper MOVE that needs to wait). This makes the difference.
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