Main components

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Part NumberDescription
74LS04Hex Inverter
74LS32Quad 2-input OR
74LS74Dual D Flip-flop, Set & Reset
74LS244
28C256Paged Parallel EEPROM 256Kb (32K x 8), DIP-28/SOIC-28
CY62256-70PC256K (32K x 8) Static RAM, 70ns, DIP-28
74LS574
74LS283

Schematic schematic

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Schematic board layout