Add writing SRAM saves to `.sav` files

Gericom / GBARunner3

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Add writing SRAM saves to `.sav` files #142

Closed RocketRobz closed 4 months ago

RocketRobz commented 4 months ago

DSi mode: Writes to .sav file when pressing or holding the POWER button, or (on 3DS) when exiting to HOME Menu.
DS mode: Writes to .sav file during SRAM writes, along with a check for if the src and dst bytes match before writing to the .sav file. May not be the best implementation, so I'm open to changes.

Closes #24

Gericom commented 4 months ago

A different implementation was made inspired by this pull request and has been merged. Still thanks for the effort, I needed this push to make the SRAM save stuff fully working 😅