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This [[8bit Printer Ports|8bit Printer Port ]] expansion is described in the book [[Maschinenspracheprogramme und Hardware-Erweiterungen für Schneider CPC's]] by [[Paul Bauriedl]]. It only connects externally to the centronics 7bit printer port (and the 5V power supply) of the CPC and doesn't require any internal modificationsto the CPC.