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Maximum .PRG file size error

zlelik
22 days ago

I am trying to recompile one Application from github from one watch model to another. When I build it I get this error

ERROR: PRG generated exceeds the memory limit of app type 'watch-app' for device id 'instinct2x': 218282 bytes.

What does it exactly mean? Is it max file size of prg file 218282 bytes or it is bigger than maximum allowed by 218282 bytes or what?

When I build it I get 363980 bytes prg file.

Can I find somewhere the list of max oprg files for each watch?

Also, how can I decrease the size of prg file? Maybe change SDK version or some compiler option?

  • 11 days ago in reply to zlelik

    Yeah maybe if it was an Apple Watch, but Garmins are seriously underpowered due to battery life (and cost?) concerns.

    I mean Garmin native code is already slow (just look at the UI of Garmin watches) and Garmin CIQ code is already running in a VM (everyone knows CIQ apps are slower and more battery-hungry than the equivalent native functionality), so it's hard to imagine any kind of emulator running at a decent speed.

    Still, it was a pretty interesting exercise to optimize the code to get it to actually run on an instinct2x. Too bad it's not playable.

  • 10 days ago in reply to FlowState

    thank you for trying to fix this, i originally asked Mr zlelik to try to help me to convert the garmingotchi to 2x from 3s code. I guess the only real work around is writing it from scratch, using minimal graphics and memory optimization? 

  • 4 days ago in reply to Tiger_vii

    There's plenty of free memory now (relatively speaking) - even on instinct2x - and I don't think that's the bottleneck. The graphics also seem fairly simple.

    The issue is that Garmin watches seem to be too slow to run a tamagotchi ROM emulator. I think my FR955 is just as fast as any newer watch (at least based on a CIQ benchmark), and the emulator runs terribly on it.

    The emulator even runs terribly on a simulated Edge, which should be 2X to 3X as fast as a modern Garmin watch (again based on benchmarks). I haven't tried it on a real Edge, but I don't have high hopes.

    So the solution would not be to try to run a tamagotchiROM emulator on a Garmin platform, unless you can find a way to make it 10 to 20 times as fast as the current version.

    The solution would probably be to rewrite it from scratch - as you said - but that might be extremely complex and time consuming.

    You could also look at porting this "tamagotchi emulator/simulator". Unlike the project discussed in this thread, it doesn't use a ROM, the game logic is reimplemented in java (or python):

    Python: https://www.pygame.org/project/3138 | https://gist.github.com/ryesalvador/e88cb2b4bbe0694d175ef2d7338abd07

    Java: https://gist.github.com/aerospark/80c60e801398fd961e3f

    [So it's more of a simulator than an emulator, as it doesn't literally run the original game ROM]

    I might try porting the python version if I get bored.