Displaced Gamers is one of the best NES gaming channels on Youtube. They do sterling work diving into the very code of the games, to figure out what they are like they are. We link to nearly every video they do. Here’s a recap:
- Contra Force (why is it slow?)
- Mega Man 3 (glitches)
- NES Tetris (why does it crash at extremely high levels?)
- Dr. Jekyll & Mr. Hyde (wherefore the jank?)
- Also Dr. Jekyll & Mr. Hyde (mo jank mo problems)
- Strider (the hideousness of its code)
- Strider Again (more hideousness)
- A primer on the NES’ sprites
- A deep dive into Punch-Out’s enemy boxer engine
Well here’s another, and it actually is a follow-up to a video that I don’t think we linked to before. So here’s that video first, on Micronics’ port of Ghosts n’ Goblins to NES. (32 minutes)
Pretty long already, exquisitely geeky! Well its successor is even more geeky, as they actually reprogrammed the game to have a more optimized sprite engine. Although it’s a shorter video, at 24 minutes!
Ghost n’ Goblins is designed around being a 20fps game, so no amount of optimization will change that, it requires more substantial modification. But the time visualizations they use indicate that it may be possible to change that to 30fps, and with other changes 60fps may be possible. Mind you, the logic for the player, enemies and weapons all assume 20fps, so unless they’re changed to account moving to 60 frames per second will triple the speed of the game, so that obviously would need to be changed as well. I look forward to seeing the next chapter in this retrocoding saga.
