what you need:
1. sevaral N64s and a controller
-you'll probably fry some N64s
-this guide will be using a psone/verge screen (they have the same guts). you can use others but psone screens are good and know how to hack them. if the video doesn't work, don't worry, you can fix it.
-any 7.2v-9v battery or battery pack will work. you can go higher if you use a screen that needs more. portable DVD player batteries are great but you can also get AA holders at radio shack
4. solering iron (15-30w suggested for electronics), desoldering iron, solder
-use flux or lemon juice to help it stick. hot glue whatever you solder to protect it
-ribbon cable is best for this kind of project: there are lots of wires in a ribbon, ribbon keeps it organized so you know what set of wires go where, they're light, small, and flexible. i've heard bad things about the newer kind with teeny tiny itsy bitsy wires so use the older kind.
6. something to get 3.3v
-this guid uses an Iru120633 voltage regultor and 2 10uf tantalum avx capacitors. you can use some car 3v adapters but i've heard 3v gets some sound and video distortion. of course, there are many other ways to get 3.3v, but i only know a few and this is the one rawls showed me and he seems to know alot about this stuff.
how to make it:
1. get everything to run on batteries. if the psone/verge screen has inverted colors, give it slightly higher voltage and that will hopefully fix it. make sure the 3.3v line gets enough amps (around 1-1.5). if you're using rechargable AAs, they're 1.2v, not 1.5v. the pinouts are in the diagram in step two.
2. wire everything together using this diagram. the separate power switches for the N64 and screen are only needed if you include the AV in/out jacks. you can bypass plugs and desolder them if you want to save space but you don't have to. for the controller, split the controller or extend the buttons with tact switches to get the buttons and joystick where you need them.
3. make a case. whether you make a new case or modify your N64/screen case, you'll need to open the N64. if you use the melting pen method, use the kind with clear plastic because it's stiff and works best. if you hate money, you can get a nintendo screw driver. be very very very very careful with N64 motherboards, they fry very very very very easily! always wear a grounding strap when handling them and try to handle them as little as possible. if you want the cartridge to be somwhere else like sliding down the back like a gamboy, relocate it. when you're done with all the case-making and wiring and all that stuff, put it in the case and you're done
if you have anything to add, tell me
(dont blame me for anything) if you fuck up