Interview: Continuing the original native OS for Arm chips

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Interview: Continuing the original native OS for Arm chips
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It's RetroTechWeek on The Register, and lproven is talking to RISC OS Open about its 26-bit origins and beyond

, the only other OS from that period that's still around today, NeXTstep descendant Apple macOS, now also runs on Arm hardware: the M1 and M2 Macs., an OS with its roots in the 1960s, RISC OS is something else: its core is hand-coded in assembler, it's tiny and very fast at what it does, and it still only supports its original processor architecture – but today, that's the most widely used CPU architecture in the world.

And RISC OS largely became a forgotten project. But there were a lot of people who worked on RISC OS in the past, who felt passionately that this was a significant milestone in British computing history, its origins being tied so closely to the Arm architecture, and so we believed that it needed to have some sort of preservation.

But one thing they were very concerned about was making sure that any work that was done on RISC OS they could stand to benefit from it financially because they'd invested quite a lot in buying the technology from its owners. Because you can imagine a closed source private piece of software. There's a lot of developers and there are a lot of pressures sometimes. They might write things in their code that you perhaps don't want publishing.Yeah, that's correct. Any people insulting other people? So we even, we wrote custom code just to scan the code base for things that might be considered offensive, stuff like that to us.

LP: Okay. Okay. And, and so, that led, I think it was called, that was the sort of dawn of RISC OS five, is that right? That was like the 32 bit version.Yeah. And, and that's the form that's now the now is open source. So now is is is rule risk is that there is another one, there is this other fork, but now I've written a bit about RISC OS on the rage recently, and I talked to the guy behind risk averse development, Andrew Ronsley.

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