Through my documentation of Game Boy boards, I have drawn up schematics of each device. I know them pretty well. Check out my board scan wiki https://wiki.nataliethenerd.com/
I jokingly made this tweet when the kit was announced, but decided to actually do it.
I know from experience of routing Game Boy CPU PCBs that there isn't much to it. There's the RAM, CPU, some decoupling capacitors and power regulation.
Note: I went with the MGB (Pocket) CPU rather than DMG for a couple of reasons.
They are pretty much the same
I have more of them
They are cheaper and easier to get. This opens up the project to more people
The DMG CPU has external VRAM, the MGB CPU has internal VRAM and in a very space conscious build that was the biggest factor.
DMG motherboard. Image source: Rodrigo Copetti https://www.copetti.org/writings/consoles/game-boy/
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