My TLROM hack crashes. Why?

[Dinosaur]

Hi everyone!

I've been lurking for a few months, learning a ton, but this is my first post.

Yesterday I put my first hacked NES game on an UNROM PCB. It works perfectly.

Tonight I tried something a little more complex and put a hack on a TLROM. It is a hack of Double Dragon III. The one that makes it easier to play. I got it all soldered together using the correct (I think) EPROMS (27c010) and wiring changes. Unfortunately, when I play it, it crashes after a few minutes into the game play. The screen scrambles, freezes, and the music stutters.

I've double and triple checked all of my connections with a multimeter. The game plays fine on an emulator. I'm confident that I split the ROM correctly. The EPROMs burned and verified without errors.

What could I have done wrong?

[wyndcrosser]

check all your wire connections (they may have continuity, but they might be touching each other or under pressure). It sounds like a wiring problem