Gamebuino forum

Hi,
How would I save data to the SD card, I want to save a score variable to be shown in the next game... I looked through some of the examples but didn't really understand what was going on. What is the easiest way?

Thanks in advance, Noah

For simple highscore storage stuff you use the EEPROM, the loader automatically handles saving that to sd card and loading from it

How do you write to eeprom? It doesn't appear to have anything about it in the reference.

That's because the EEPROM library is part of Arduino, not Gamebuino
See the Arduino EEPROM library reference.

I think it would be really helpful if the reference had a brief discussion of the way that the loader deals with the eeprom, because I had to look through the source of the loader to be sure I understood how it worked.

If I recall, the loader automatically saves the eeprom of a program whenever it starts if any byte in the eeprom is not zero, and the eeprom contents are saved in a .SAV file on the SD card with the same name as the game. Otherwise, it will not bother to save it. Then, right before flashing a game, it checks whether a save file exists for that game and, if so, populates the eeprom with the contents of that save file. I wanted to check this when I was adding highscores to a game because it was not clear to me at first whether I needed to do anything special besides just writing to eeprom.

Is it welcomed here for anyone to make additions to the wiki? I think it would be helpful to have a simple explanation about this, and I would be happy to do it myself if nobody objects to the idea. I just don't want to upset anyone if somebody objects and thinks it isn't needed.

What you just said about the eeeprom is correct, it would be great if you could add it to the wiki for others!