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Show HN: A DOS-like hobby OS written in Rust and x86 assembly

(github.com)
207 points krustowski | 1 comments | 19 Jun 25 13:38 UTC | HN request time: 0.229s | source

To try it out, simply build the project yourself from source, or use attached bootable ISO image of the system (in Releases on Github) and run it in QEMU.

https://blog.vxn.dev/rou2exos-rusted-edition

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OhNotAPaper ◴[19 Jun 25 21:41 UTC] No.44322773[source]▶
Out of curiosity, why x86? Is it the preponderance of resources? The weird instruction format? The complexity of the boot sequence? Are you specifically trying to mimic DOS?

> A support for the ARM architecture (aarch) is coming soon too.

Wow! How do you support a DOS-like OS across multiple architectures when DOS itself is tightly tied to interactions among the program, the system code, and the architecture?

replies(2): >>44323939 #>>44325826 #
1. krustowski ◴[20 Jun 25 09:00 UTC] No.44325826[source]▶
The x86 arch is used because this system iteration derives from the first one, which relies on BIOS interrupts and inline assembly in Turbo C. I am not trying to mimic (MS-)DOS exclusively, but both systems are highly inspired by it.

IMO multiple archs could be supported as Rust compiler allows the target arch specification, so one would build a specific target before the build itself.