I'm writing an NES emulator from scratch, mostly as for the 'fun' experience. I think I've finished the CPU core but I just know there's a bug I haven't found... By constantly setting the vblank bit I can watch Super Mario Bros run and it looks like it is running correctly, but I'd like to run a program where I can confirm the core is working by checking the end values of the registers or something to that effect so I can get rid of the bugs from the CPU before I worry about anything so complex as the PPU
I guess the best option would be to not be lazy and write it myself, but... meh
EDIT: Found Nestress.nes, which requires the PPU and IO to be somewhat functional to get to the tests... and found references to nestest.nes which I couldn't find many details about. If there were some generic code that didn't depend on the PPU that would be ideal, otherwise I guess I'll just try implementing the PPU then test with Nestress.nes
