Quote:
Originally Posted by ross
No, i mean the very first DMA cycle in line 0.
See attached image (a zoom in visual DMA debugger).
An empty copper list with CEND  |
You said "cycle 0" previously, nothing about being specific to line 0
Copper does that extra cycle at vblank startup, it is useless looking read from previous line's last copper pointer. I guess this cycle does cop1 pointer to internal copper pointer copy. (Note that it is not same cycle sequence that COPJMPx access does)
Following cycle is first "normal" read.