PC Engines system board schematics

PC Engines hardware may be the most "open source" hardware available on the market. Not only you are getting full access to the source code of the bios, but also you get full access to the hardware schematics. When something breaks, which almost never happens, you can read the schematics and figure it out for yourself.

APU4 board schematics

• APU4_board_schematics

 

APU3 board schematics

• APU3A2 and APU3A4
• APU3B2 and APU3B4
• APU3C2 or APU3C4

 

APU2 board schematics

• APU2B0, APU2B2 and APU2B4
• APU2C0, APU2C2 and APU2C4

 

APU1 board schematics

• APU1C and APU1C4
• APU1D and APU1D4

 

Coreboot BIOS

You can find the latest version of the bios source code here: https://github.com/pcengines/coreboot