Load emulator state, render only a frame

[mgerstgrasser]

Thanks for this amazing piece of software! Is it possible to load emulator state information (RAM, registers, anything else that might be needed) to exactly replicate a state? If so, would there be an easy way to just render the most recent frame corresponding that state (i.e. not necessarily further executing the game)? I suspect the second part might be tricky given how (to my understanding) the Atari 2600 renders the screen output, but I wonder if there might be something I don't know about.

[ppeccin]

Hi!

Thanks! :-)

The emulator has the savestates feature. So it is possible to load a complete and exact machine state that was previously saved. It also has the feature to pause the emulation and execute it frame-by-frame. But since the 2600 does not have a video frame buffer (VRAM), there is no concept of "current" frame based on the machine state. You'll need to let a frame's time pass after you loaded the state, so the machine + CRT can render the next frame.

Of course we could have added an image of the LAST frame generated when you create a savestate, but that would be a bit artificial and really not needed for the emulator operation.

So the answer would be: Load a savestate with the emulation paused, and then render only one next frame.

Paulo

On Thu, Oct 15, 2020 at 11:07 PM mgerstgrasser [email protected] wrote:

Thanks for this amazing piece of software! Is it possible to load emulator state information (RAM, registers, anything else that might be needed) to exactly replicate a state? If so, would there be an easy way to just render the most recent frame corresponding that state (i.e. not necessarily further executing the game)? I suspect the second part might be tricky given how (to my understanding) the Atari 2600 renders the screen output, but I wonder if there might be something I don't know about.

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