acorn atom and acorn system series • Re: Alignment of sockets on Oddys System 5 backplane

Apologies for anyone of a nervous disposition who was scared by the noise of a massive penny dropping! I'd foolishly assumed that CB1-PB7 were connected together to allow the two boards to communicate. Presumably those signals are really being put on the backplane so a homebrew card can plug into a spare backplane socket and make use of them (hence your Reserved for Expansion slot)? In which case,…