It's all done except for relocating the cart slot, wiring in controls and obviously building a case for this thing.
Wideboy + home built devcart + colorized gameboy romhacks ftw!
Once I get this thing more built I can have direct captured gameplay footage of gb, gbc, and gba (oh wait I don't have a gba flashcart yet) romhacks running from the real hardware. It's all hardwired together and glued firmly so nothing will break. Uses a single ac adapter.
Thanks to bacteria for posting the hard wiring guide-o.
Thanks to the taiwanese company that made this tv converter thing.
The video connections were all wired wrong by default and the s-video output circuit needed tweaking but i fixed it all and completely got rid of all the video distortion.