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sega/megadriv.cpp: replace irq_callback with vpa_after / vpa_sync cpu_space_map #14038

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  • video/315_5313.cpp: make VDP irq enable times more deterministic

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* video/315_5313.cpp: make VDP irq enable times more deterministic
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angelosa commented Aug 10, 2025

This is my best shot to implement stuff as described by https://jsgroth.dev/blog/posts/emulator-bugs-fatal-rewind/
QA not yet updated, fixes sesame, fatalrew, MT06228, doesn't break warlock

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