THE DEC PDP-1 MANUAL
2025 ONLINE EDITION

A MESSAGE FROM DEC

CONTENTS
Getting Started
Using a PDP-1
Some Useful Programs
Getting Started
1. Building the 2025 PiDP-1 replica
Please refer to the PiDP-1 Building Instructions & the extended PiDP-1 Rack Version Building Instructions.
2. Installing the PiDP-1 software
Please refer to the PiDP-1 Building Instructions, section 2.3. Using the PiDP-1
Important to understand before you continue:
- The PiDP-1 will be running the PDP-1 'core' - the simulator - at all times
- There are simulators for all the major peripherals:
- the Soroban typewriter, for keyboard input and typewriter console output
- the Type 30 Display
- the paper tape and paper punch devices