/vr/ - Retro Games

So, I'm a bit closer to getting my FC audio Castlevania 3 English reproduction cart made up. Today I got the donor Famicom cart with the VRC6 chip from eBay. One of the bigger challenges with this project will be to fit the PCB inside of the cart, since the VRC6 chip gets in the way of the grippy tab and keeps it from closing.

The most common solution to this kind of problem is to remove the plastic on the cartridge, but instead of that I'm going to try desoldering the VRC6 chip, and soldering it to a ribon cable bridge on the other side of the board. where I can tuck it away. I want to keep the outside of the cartridge looking nice and tidy. This would all be easier if I was using Akumajo Densetsu as a donor cart, but I didn't want to destroy one for this mod and it's also a fairly expensive game (I paid $13 + shipping for this cart).

I've got the pin adapter on the way in the mail from China. My first order of business will be to get everything fitted inside of the plastic cartridge without changing out the ROM chips. Then, after I can confirm that the original game works after the aforementioned modifications, I will order the hacked Castlevania 3 EEPROM chips and swap them in.

Wiring up the NES for VRC6 audio should be easy. It only involves adding one resistor to the NES.