So I was almost done, and pretty much right on cue, PERIL. Somehow my board stopped working. The power LED turns on and the 7805 gets hot at the same interval it was before (not extremely hot really quick or really slow or anything like that) so I don't know. I checked all my connections and all that and tested on another board so it's not anything like that. Normally I would spend more time troubleshooting such issues but MGC is in 10(!
) days so it makes more sense at this point in time to start over and try to fix the other board at a later date. It sucks but I guess its for the best since I wasn't keeping much of a worklog here anyway, and now I can.
Heres the old board with pretty much everything wired up and in the respective place it was going to fit. I was going to do the cartridge slot last, which I guess is good since I knew it wasn't that hot mess that was causing the problem with my old board. Most of my time to get to this point was research and multimeting to make sure all my connections were in the right place. Shouldn't take much time to rewire everything to the new board. Other than the cart slot, the most annoying job was wiring the controller board and main board together (which is also redundant in the first place since I could just grab the points from the main board connecter itself but there is space for it, and it fits nicely in the NES case so why not.
Wiring the cart slot. It is from a dead snes 2 from a long time ago (guess I'm still not having too good of luck here with super nintendos), and I put some perf board under it so all the pins won't fall out when I put in and take out a game (which they did when I de-soldered it from the main snes board). Unfortunately the expanded cartridge tray shown in the first post is too large to fit now, but I have an alternate solution in mind, more on that later.
Rewiring everything to the new board. Here is how the NES power buttons connect to the SNES board. From left to right, Yellow and Orange are for the reset button and Red and Brown are for the power. The other two that you can barely see and aren't wired up at the moment are for the LED. Interesting point (at least to me) is that the NES LED on the power board must be multicolor, as it is displaying a orangish yellow when hooked up here. I'll probably replace it with a red LED to keep it in tune with the NES stock look I'm trying to achieve here.