Discuss emulation of the Nintendo Entertainment System and Famicom.
4 posts • Page 1 of 1
Get PPU timing working: run 3 dots every CPU cycle, run a scanline every 341 dots, implement port $2000, and make an NMI every 262 scanlines. Observe what the game tries to write to $2006 and $2007. This just might be enough to get games to start booting and writing to $4000-$4015, at which point you can start audio emulation.
One thing you could do is implement routines to draw the nametables. Just drawing the nametables is enough for simple but important games like Donkey Kong and DK Jr to run. Just take it a step at a time and don't attempt to do everything at once and do it all perfectly. The first time won't be perfect.