Initial HW Version I/O query

Tutorials Q&A
1

Now that I have replaced the original motherboard with the revised version, the original is essentially a spare part that I was think about repurposing as an embedded development board.
Are there any circuit diagrams which indicate the various interfaces to the main CPU? (power, I/O, etc) Also is there a GPIO array (like the raspberry Pi)?

2

this? https://github.com/clockworkpi/GameShellDocs/blob/master/clockwork_Mainboard_Schematic.pdf