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Famicom Radia Senki translated repro troubleshooting Having some trouble getting translated roms to boot

Dec 15, 2018 at 8:02:39 PM
Khromak (16)

(Sean Dumont) < Crack Trooper >
Posts: 168 - Joined: 11/26/2017
New York
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Hey everyone - hope this is the right place to post, seemed the most appropriate. I saw Voultar's video about Radia Senki and how to make repros and thought...what a great game and a great idea for a Christmas gift! Since then I've acquired 2 copies of the game and have been working on swapping the chips out for EEPROMs with a translated rom on them.

No matter what I try I can't seem to get them to boot, however. Here are some details about what I'm doing. I'm testing the games on an AV Famicom using just the board no case, and I clean them with Isopropyl Alcohol and let them dry before testing each time. For pins which need to be swapped, I'm pulling the pins up, cutting off the ends of the legs, and soldering wires from the pin, through the vias, and soldering them to the underside of the board. Before I test the game, I check continuity using a multimeter at each of the wired connections.

I've tried these 3 pin mappings and none have worked yet, maybe these are wrong, maybe there's something else going on, I don't know! Any advice would be helpful, especially a resource (if one exists) where I can check the pin mappings for games and/or chips. I'm using M27C1001 (CHR) and M27C2001 (PRG) chips in both games.

1.) PRG: Pin 1 to Pin 32, which is connected to its hole; Pin 2 to hole 24; Pin 24 to Pin 16 (ground) which is connected to its hole; Pin 30 to hole 1; Pin 31 to hole 2
     CHR: Pin 1 to Pin 32, which is connected to its hole; Pin 2 to hole 24; Pin 22 to hole 31; Pin 24 to hole 2; Pin 30 to hole 1; Pin 31 unconnected to anything
2.) As #1 but with Pin 1 unconnected on both chips.
3.) PRG: Pin 1 disconnected; Pin 2 to hole 24; Pin 24 to Pin 16 (ground) which is connected to its hole; Pin 30 to hole 1
     CHR: Pin 1 to disconnected; Pin 2 to hole 24; Pin 22 to hole 31; Pin 24 to hole 2; Pin 31 unconnected to anything
I also tried some minor variants of these to no success. In all cases the game boots to a grey screen. The console works with other games, FWIW, and I know the rom, at least prior to being split with Famirom, worked on an emulator. I'm fairly certain it's a wiring issue but don't know where to look for the exact pin matchups. I was trying to use this guide, Voultar's

, and some advice from a fellow NA member in PM, but nothing has worked thus far. Help!

Thanks in advance,
Sean