Featured image taken from here
- DMG MAIN BOARD SCHEMATIC & CIRCUIT (+ARDUINOBOY) – some very useful schematics of the DMG boards here, image.
- Gameboy Hardware – some indispensable schematics and links
- The Game Boy Project – invaluable (PDF: GBProject)
From Gameboy Hardware
These schematics were discovered and plotted by Jeff Frohwein. They are more complete than the ones above.
The MBC schematics are made by Pascal Felber, who also wrote a document on GameBoy cartridges, MBCs, and their programming.
The LCD PCB from the same thread, this post: