THE SYSTEMFROM MIT’S SOURCES
The Lisp Machine system
For both machines, continuing where MIT’s released system left off: MIT’s own sources, recovered from its backup tapes and brought up by LM-3.
MUIR-SYS · THE LISP MACHINE SYSTEM
The system,
continued.
The Lisp Machine system for QUUX and for the CADR, continuing where MIT’s released system left off.
The updated system, for QUUX, is on the repository’s main branch; the CADR’s system continues on its cadr branch. Each has its own releases.
01 / WHAT IT IS
MIT’s system, carried on
for each machine.
THE MACHINEQUUX
QUUX is the CADR evolved
In QUUX, run by muir-sim and muir-fpga: better in performance and capacity, and in modern computing, such as the display’s resolution, block storage and the network. It says which improvements it has, and the system reads them at boot.
THE AIMEVOLUTION
It evolves the system
It changes the system where a change pays for itself, rather than rewriting it. Backward compatibility is not an aim.
THE RELEASESCADR · QUUX
Releases for both machines
The release notes say what each release is and what it changed.
IT RUNS ONSIMULATOR · FPGA
muir-sim and muir-fpga
muir-sim, the simulator, and muir-fpga, on an FPGA, with ozd, the CADR’s associated machine, serving the CADR’s bands.
THE SOURCEAGPL-3.0-OR-LATER
Free software
The source is under the AGPL, version 3 or later.
02 / THE TWO LINES
What each
changed.
CADRSYSTEMS 1XXX
CADR’s system
What the CADR’s releases removed, added and changed from MIT’s System 100.
CADR’s systemQUUXSYSTEMS 2XXX
QUUX’s system
What QUUX’s releases removed, added and changed from MIT’s System 100, its microcode and what it reads of the machine at boot among them.
QUUX’s systemThe system’s sources are MIT’s, by way of LM-3; muir-sys’s changes, builds and documents are made with Claude Code, using Anthropic’s Claude Opus and Claude Fable.
© 2026 Mete Balci. muir-sys is AGPL-3.0-or-later; the system’s files carry MIT’s notices.