I'm wondering if this thing would be any good for an N64 portable since it runs on 12v just like the 64?
Also, has anyone worked with one of these before and or have a pinout for it.

Knowing MadCatz, it probably sucks.

You don't want a 12v screen. You want a screen that will run on 7.4v , because that is what the N64 can run on and then you can use 7.4v batteries.

And yes that screen sucks.

Figured i'd ask, seeing as how it wouldn't cost me anything to use it since I already have it.
But I ended up buying a psone lcd anyways since there's so much more documentation on it.

I actually tried to use that exact same screen for some other mods and it didn't work out well for me. The voltage is another factor as was just mentioned.