Fix MMC3 mapper IRQ timing with proper A12 toggle detection - #2

Draft

nathsou with Copilot wants to merge 3 commits into

mainfrom

copilot/fix-b1b21a07-6b3b-44c5-82fb-af44c9386e91

Commits on Jul 10, 2025

Initial plan
Copilot
committed
9a75a09
Fix MMC3 mapper IRQ timing and add A12 toggle detection

Copilot
and
nathsou
committed
4bac35d
Final verification of MMC3 mapper fixes

Copilot
and
nathsou
committed
c94691d