In a previous topic, we have an explanation on why a device between the console and the card game cannot save the current state of the game :
[...] Saving state is done by copying the current contents of memory/registers into a file, and then loading that file again later. The console's memory is not part of the cartridge. Therefore, this can't be done by capturing the data coming off the cartridge - you'd have to open the case, and solder down something that is capable of reading the contents of the console's memory, and allow it to be restored later. This is a complicated process, and would likely be hard to get right. [...] - agent86
This explanation makes a lot of sense and I'm agree with that.
But then I think about the Everdrive, made by Krikzz, the x7 model notably. This stuff can actually make save states, the game is like emulated with a rom, just like PC emulators, but it's running on the real console hardware. So how is it possible ?
I'm confused, please enlight me.