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Old 18 January 2016, 08:16   #11
Toni Wilen
WinUAE developer
 
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 42
Posts: 19,561
Every part of chipset has odd undocumented features

btw, there is one more unexpected Copper behavior: if COPJMP sequence's second cycle would use cycle immediately after first refresh cycle in scanline, copper skips it and jumps directly to 3rd cycle of COPJMP sequence (Skipped cycle is idle cycle that normally needs free dma cycle. Copper still functions normally when skipped). This makes COPJMP sequence 1 copper cycle faster than normally!
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