Computer Lab_

The Lab

Four DEC replica systems running real operating systems, connected to the global HECnet hobbyist network

PDP-11/70

LARRY

PDP-11/70

RSX-11M-PLUS V4.6 • DECnet 31.130

PiDP-11 replica with working front panel. Full development environment, multi-user terminal access. Live on HECnet.

Terminal Available
VAX 8600

CURLY

VAX 8600

OpenVMS V7.3 • DECnet 31.132

DEC's first ECL-based VAX, emulated via SIMH. Running OpenVMS with full DECnet connectivity. Live on HECnet.

Terminal Available
PDP-8/I

MOE

PDP-8/I

OS/8 V3D • PiDP-8/I Replica

Fully functional PiDP-8/I replica running OS/8 V3D. Boots multiple operating systems including TSS/8 time-sharing.

Terminal Available
PDP-10

SHEMP

PDP-10

TOPS-10 • 36-bit

DEC's flagship 36-bit mainframe. The computer that built the ARPANET. Running TOPS-10 time-sharing.

Arriving This Week

HECnet

DECnet Phase IV

Hobbyist Ethernet Connect Network

LARRY and CURLY are live on HECnet — a global DECnet network connecting vintage DEC systems across the world. Reach systems in Sweden, Russia, the UK, and beyond.

Network Active

About This Lab

This is a personal collection of DEC computer replicas, each running authentic operating systems from the 1970s and 1980s. The systems are built from Oscar Vermeulen's PiDP kits and SIMH emulation, with real front panels, blinkenlights, and working switches.

All systems named after The Three Stooges. All connected to HECnet, the global hobbyist DECnet network, making them reachable from vintage computing enthusiasts worldwide.