[anotherworld] Implement save states

felipesanches / mame

MAME - Multiple Arcade Machine Emulator

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[anotherworld] Implement save states #15

Open felipesanches opened 7 years ago

felipesanches commented 7 years ago

MAME has got gamesave infrastructure that we can benefit from in addition to the game's native password system. This can be very useful for debugging as well, since it can save me time during emulator development.

felipesanches commented 2 years ago

I've got a partial implementation of save states working today. Code is being force-pushed to a single-commit frequently amended branch at https://github.com/felipesanches/mame/tree/anotherworld

felipesanches commented 2 years ago

This is what currently works regarding save states:

sound-sample playback on the 4 channels
virtual machine execution / program-counter / stack / vm variables
video buffers / graphics rendering

Work in progress - works partially, but still incorrectly, may even crash the emulator:

The music tracker data is not yet being saved correctly.