Vacuum Tube Computer Part 35: Output Register—a One-Byte Write-Only Memory

Output from the one-bit vacuum tube computer is sent to an 8-bit addressable output register, where it is stored and can be sent to external devices. Since the output register cannot be read by the computer, it is genuinely write-only memory. Building the register’s flip-flops with vacuum fluorescent displays as one of their tubes integrates display of the output’s state with its storage.

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