PiDP-11/70
A faithful replica of the DEC PDP-11/70 minicomputer, running RSX-11M-PLUS
What Is This?
This is a real PDP-11/70 replica built by Oscar Vermeulen's PiDP-11 project. It runs the SimH PDP-11 emulator on a Raspberry Pi, with a full front panel of working switches and blinkenlights — just like the original 1975 minicomputer.
Operating System
Running RSX-11M-PLUS V4.6, Digital Equipment Corporation's real-time, multi-user operating system from the late 1970s. It supports multiple simultaneous terminal sessions, batch processing, and a full development environment.
Play Vintage Games
- Classic text ADVENTURE
- VT-100 Pac-Man, Centipede, Missile Command
- Breakout, Lunar Lander, and more
Network
- Connected via HECnet (DECnet hobbyist network)
- Accessible over the internet via Cloudflare Tunnel
- Guest terminal access for games
About the PDP-11
The PDP-11 was a series of 16-bit minicomputers sold by Digital Equipment Corporation from 1970 into the 1990s. It was one of the most influential computer architectures ever created — Unix, C, and much of modern computing were first developed on PDP-11 systems.
The PDP-11/70, introduced in 1975, was the top of the line: it supported up to 4MB of memory (massive for the era), memory management, and could handle dozens of simultaneous users. The original cost was around $100,000.
Today, this PiDP-11 replica faithfully recreates the experience for a fraction of the cost, running the same software that powered universities, labs, and businesses decades ago.