Former Microsoft Engineer Revives PDP-11 Using Discarded Parts

A fascinating new retro computing project has captured the attention of tech enthusiasts worldwide. Former Microsoft developer Dave Plummer, best known for creating Windows Task Manager and Space Cadet Pinball, has successfully rebuilt a PDP-11 minicomputer using discarded spare parts. In his latest YouTube video, Plummer takes viewers through the intricate process of PDP-11 restoration.

The Legacy of the PDP-11

Digital Equipment Corporation (DEC) originally launched the PDP-11 in 1970, making it one of the most influential minicomputers of its time. With its groundbreaking 16-bit architecture and innovative Unibus system, the PDP-11 revolutionized computing. It was widely used across scientific research labs, power plants, transportation systems, and telecommunications networks. By the early 1980s, consumers had purchased over 170,000 units, cementing the PDP-11’s place in computing history.

Bringing the PDP-11 Back to Life

In his detailed video, Plummer meticulously walks viewers through the restoration process. He starts with a box filled with discarded PDP-11 components, carefully identifying each part before assembling them. His ability to simplify complex technical details makes the video engaging for both seasoned tech experts and those new to vintage computing.

Plummer’s build features a backplane with a CPU card slot, two 512KB RAM cards, and a Linux-compatible QBone card. The reconstructed PDP-11 boasts an impressive 1MB of RAM—an extraordinary amount for a 1970s-era computer.

A Unique Modern Take on the PDP-11

Plummer identified the restored model as the PDP-11/23 Plus, which includes an M8189 CPU and a QBUS backplane from the early 1980s. Plummer chose an open-frame structure instead of the original design’s traditional chassis. This approach not only provides better visibility of the internal components but also adds a modern twist to the classic design.

The Significance of This Retro Computing Project

This project showcases the PDP-11’s enduring legacy and the ingenuity of tech enthusiasts who actively preserve and celebrate vintage computing. Plummer’s PDP-11 restoration serves as a testament to the resilience and adaptability of older hardware, proving that even decades-old technology can still find relevance today.

With his expert insights and engaging presentation style, Plummer’s PDP-11 revival stands as a must-watch for anyone interested in retro computing. His ability to bridge the gap between history and modern innovation makes this project a standout in the tech world.