content: Sometimes people use github just to backup code and no instructions or extra information is provided. They use a free account so the code is public and do not give a shit one way or another if you can run the code.  Ok, this is good to know. I didn't know people were doing this, as I've never used it that way myself. However I do see garbage readmes on more well known githubs too, and their phrasing sounds like they're talking to an audience that is to use it.   it is broken up into a low level library that a gui can build on top of and a separate gui  Where is the GUI in the code for this repo? I see that you linked to the GUI repo that they have, but how did you get there from the core page?  Lastly, did you know about cores before looking into this or was there some way for you to ascertain that meaning from this page? Because I had an idea for what was meant by the core here, but every single other place I went did not talk about cores. And no other emulator I've used has made mention of it.