How to Build a 4-Bit Computer on Breadboards Using Individual Transistors

A simple 4-bit computer is built on breadboards using individual transistors. This computer is called the GSN477. This is because it was built for the Global Science Network, is 4-bit, and contains two 7-stage counters. Sections of the computer are the clock, program counter, ring counter, 10 bytes of memory, opcode register, opcode decoder, control …

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