@Rybags  So I am revisiting the continuiting of the RAS and CAS connections between Freddie and the Ram chips.   I am not great interpretting schematics at the best of times I have to say.   However I think I have possibily found a likely mislabelling on the schematics, which are the reworked ones from Graham Rolle in 2020 which was based on Jerzy Sobola's initial work on the XEGS schematics.  (I believe Jerzy's work has since been cited for errors and some accidental mislabel