Linux Now Runs on the Atari Jaguar, a 1993 Console with Just 2 MB of RAM

18 hours ago

Linux kernel 7.2.0-rc1 has been booted on the 1993 Atari Jaguar game console by developer Joel Bueno.
The Jaguar uses a Motorola 68000 CPU with no MMU, 2 MB of RAM, and custom chips Tom and Jerry.
Key challenges included the lack of virtual memory support, solved using the uClinux/NOMMU option and a flat memory model.
To fit the kernel in 2 MB RAM, execute-in-place (XIP) was used, keeping read-only parts on cartridge ROM.
Timers from the Jerry DSP were repurposed to provide system interrupts for the Linux scheduler.
Custom console drivers were written for early boot output, using Jerry's serial pins and later Tom's video output.
Userspace is minimal: Buildroot with BusyBox, FLAT binaries, and a direct shell launch due to memory constraints.
No full bootloader; control jumps directly to the kernel from the cartridge header.
The project is seen as a demonstration of Linux flexibility and a retro-computing achievement, despite not being practical for daily use.
Comments debate the value: some call it wasted time, others highlight the learning and problem-solving involved.

Hasty Briefsbeta