[plandis]

I would honestly recommend not trying to emulate the gameboy if you’re doing emulation for the first time. I did this and it didn’t go very well (but perhaps I’m a below average person)

Chip8 or the NES (6502+PPU) are probably better places to start for beginners.

[jdmoreira]

Isn't the PPU very hard? Especially the fact that both the 6502 and the PPU execute in parallel?

[plandis]

The PPU is definitely complex but the NES has the benefit of being much, much, much better documented than the GB which is honestly a huge advantage.

The NES also has a bunch of complex cartridge mappers but you don’t necessarily need to implement the most complex ones like MMC5.