When I first wanted to try a Japanese Super Famicom to English Cart Translation I bought a ready made DIP36 – TSOP40 Adapter Board with the 29F032 already soldered in place from buyicnow. I then went on to build a converter so I could use it with my GQ-4X, before finally converting a Mother 2 cart into Earthbound.
Later on I thought I’d try soldering it myself, after watching a few videos on youtube. So I bought the adapter boards and EEPROMs seperately and attempted it.
This is one of the few times I’ve used Flux, I ran a Flux Pen over the contacts on the board before placing the chip on it. Making sure to get the orientation of the chip correct, Leg 1 is marked with a dot/circle on both the board and the chip.
A lot of the youtube videos use the drag method to solder the small legs, I personally prefer to solder the legs individualy, I just push the fine tip of my iron down on the legand it melts the solder underneath it that is already on the contact pad. There isn’t enouh solder to bridge any of the legs, apart from on the 2 which are already bridged together!
Held up to a light you can clearly see that it’s bridged before and after soldering.
That’s probably the most difficult part completed. Next up are soldering a couple of points up together, R1 and R3 (it’s okay to leave R2, that links up some other points which we aren’t concerned about). I usually add a small bit of solder to the solder pads, and then hold a piece of stripped wire (this is Kynar) over the points and then melt the solder and cut the wire. Make sure you’re cutting it where you aren’t going to damage any of the traces on the board.
Nearing the end now, you need some pin headers, I find it easiest to temporarily place them in the holes of the cart board that you’re making, or you could use another adapter board?
I start by soldering the corners and making sure it’s straight, then working my way along each edge.
And test it using a test cart with a ZIF socket (this one is missing a CIC, but with a SuperCIC mod you don’t necessarily need the security chip on the cart).