Welcome to the reformulation of the Minuteman Computer Users Group, an organisation first convened on 12 June 1970 at Anaheim, California, at the initiative of Dr. Charles H. Beck of Tulane University. The original MCUG brought together universities, government laboratories, and industrial contractors who had acquired surplus D-17B guidance computers from the Air Force’s Minuteman I modernisation programme.
In its active years the group produced a remarkable body of work: a hardware divide modification, a FORTRAN-based simulator, a symbolic assembler, hybrid computing interfaces, and a published documentation series — the MCUG reports — covering wire lists, schematics, programming techniques, and applications. Members demonstrated the D-17B’s utility in fields ranging from numerical control to biomedical analysis.
The organisation’s activity wound down as the machines aged and their owners moved on, leaving behind an archive of documentation and a legacy of practical engineering that deserves to be preserved and extended.
The reformulated MCUG is an open collaborative community with four interlocking goals.
1. Documentation and archival preservation
Systematically locating, scanning, and publishing every surviving document relating to the D-17B and its sister machines: technical orders, schematics, MCUG reports, theses, internal Autonetics publications, and correspondence. Without a complete documentary record the hardware work that follows is working blind.
This includes active outreach to institutions known or suspected to hold relevant material, among them:
- Boeing Historical Services, as custodian of the Autonetics heritage archive
- The Computer History Museum
- AFIT
- DTIC
- Tulane University and other university special collections
2. FPGA-based functional replica
A fully open, verifiable soft-core implementation of the D-17B, targeting accessible development hardware so that any member of the community can run the machine.
This work is already substantially underway, grounded in the original FORTRAN simulator as a behavioural model and validated against a suite of tests derived from original programming examples.
3. Card-level hardware replica
Physically recreating the D-17B’s circuit cards, informed by recovered schematics and verified against the FPGA model.
This is a longer-term goal requiring both the documentary foundation of the first workstream and the functional reference provided by the second — but it is the necessary step toward understanding the machine at the level its designers worked.
4. Restoration of a physical machine
A small number of D-17B computers are believed to survive. The long-term aspiration of the reformulated MCUG is to see at least one returned to working order — not as a static exhibit but as a functioning computer, capable of running original programmes and demonstrating the engineering achievement it represents.
Beyond the D-17B, the reformulated MCUG looks to extend this work to the wider family of Autonetics computers, including the RECOMP I-III and the D-37C, recognising that these machines share a common architectural lineage and that the methods and materials developed for the D-17B project are directly applicable to their preservation as well. ALL OF THE VERY COOL AUTONETICS COMPUTERS!
All work is conducted in the open. Documentation, source code, schematics, and research notes are published under open licences, and contributions from the wider community are actively welcomed.
Lastly if you have memories of these machines or of having used Autonetics computers I would love to hear from you.
Damien Towning