The Journey to Penguins on the 32X
“Can it run Linux?” has now secured its place alongside “Can it run Doom?” when it comes to pushing unconventional hardware to perform tasks it was never designed for. A Spanish engineer, known as cakehonolulu, has managed to get Linux up and running on the Sega 32X. This individual had just completed getting Linux to work on the Atari Jaguar and decided to attempt the same feat with Sega’s 32X, an operating system on 90s gaming hardware.
A Quick Walk Down Nostalgia Lane
The Sega 32X was a quirky little expansion for the Genesis (Mega Drive in other regions). Launched in 1994, it hit the market just in time to be overshadowed by Sony’s PlayStation, while Sega was preoccupied with the Saturn. The 32X added 256 KB of SDRAM to the Genesis’s 64 KB, included 256 KB of video RAM, and incorporated two Hitachi SH-2 CPUs running at 23 MHz.
The Linux Endeavor
Linux tends to favor the 68000 architecture, but cakehonolulu faced quite the challenge getting it operational on those SH-2s (even just to output anything meaningful over the UART). He mentioned that the challenge was a mix of components, but primarily the tiny memory available to even initiate the process. Add in that framebuffers consume their own memory, and there’s hardly any room left.
Ultimately, Linux did boot, but then came the puzzle of symmetric multiprocessing (SMP) since the 32X features two SH-2s. Cakehonolulu remarked, “I was curious whether running SMP was feasible on the 32X setup since it lacks certain hardware components we typically rely on for multi-processor synchronization. It turns out it is achievable; just don’t anticipate groundbreaking performance.” Nonetheless, it functions, and that’s sufficient for him.
Hardware Successes
With the port completed, cakehonolulu created a basic console display driver. Regarding a keyboard, he contemplated it but chose not to plunge into the madness of pursuing it. Instead, interacting through the TTL UART pins seemed reasonable, considering the accomplishment of simply booting Linux.
What’s Next?
What’s the utility? Not much, considering its constraints. We’re fortunate to fit in a few more kilobytes. Yet it’s a neat testament (Linux and Busybox) to empowering individuals to experiment with and develop software when it’s well-crafted. “Not that I envision anyone using it extensively, but I take pleasure in the tinkering,” cakehonolulu shared.
Upcoming Aspirations
What’s on the agenda? “Sega Saturn : )” A toast to all tinkerers everywhere, motivated by that age-old rationale: “because it’s there.”
Conclusion: “Because it’s There”
So there you have it: inserting Linux into places you never thought it could fit. It’s all about the delight in discovering whether it’s possible, even if it requires the patience of a saint.
