Electron Second Processor

I bought the E2P Circuit Board with Construction Manual from Jafa Systems and built it up from components I had. Below are photographs of the circuit board both top and underside and circuit Diagram. Blank Circuit Board Top Side Blank Circuit Board Under Side Blank Daughter Board Circuit Diagram Construction Manual - 3.6Mb E2P Code ROM | Home | PDP8a | Electron | BBC B and B+ | BBC Master | Amiga 500 & 600 | Amiga 1200 | | Sinclair ZX81 | Sinclair Spectrum 48K & +2 | Sinclair QL | Amstrad NC100 Notepad | Amstrad CPC464 | Softy |