Improve RSP accuracy by backporting changes from simple64#1153

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Rosalie241 wants to merge 3 commits intomupen64plus:masterfrom

Rosalie241:simple64-rsp-backport

Commits on Sep 26, 2025

Improve RSP accuracy by backporting changes from simple64
Rosalie241
committed

Commits on Sep 27, 2025

Fix frame count being 0
Rosalie241
committed

Commits on Sep 28, 2025

Fix save states
Rosalie241
committed