[gf263]

How would someone begin to work on something like this?

[jchw]

My recommendation is to start with the CPU emulation. The CPU in the Gameboy has decent documentation and there are plenty of implementations to look at if you're stumped. (One I like particular is the core in Higan, a multisystem emulator written in C++.)

[voltagex_]

I remember seeing some people recommend starting with the NES rather than the Gameboy - any ideas on this?

[stevekemp]

http://emulator101.com/ is a good resource, as is https://www.reddit.com/r/emudev/.

Or you can just cheat, design a "toy" instruction set, and write something to process it. A couple of years ago I did that, in C/Perl:

* https://github.com/skx/simple.vm

Later I rewrote the interpreter/emulator in go:

* https://github.com/skx/go.vm

The downside with my approach here is that I ignored graphcs, sound, & I/O.

These days I'd recommend you write an emulator for the Chip-8 system..

[corysama]

http://emulator101.com