My colleague Pablo Forcen uploaded to the CPCwiki the photos of the #Amstrad #CPC version 0 motherboard, originally designed for the MOS 6502, which Roland Perry brought to us at @retroalacant As always, GPL license.
https://www.cpcwiki.eu/index.php/CPC_Prototypes#The_.27Version_0.27_Prototype
Awesome, thank Pablo for us! I'd like to be able to see this in person...
I've added more pictures, taken by our friend
@deepfb and also added a composite (also called x-ray) view of the board :D
This is history 8)
Very interesting, the Expansion bus is so small!
This was probably not very close to a possible 6502-based release candidate.