mirror of
https://github.com/20kdc/OC-KittenOS.git
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80 lines
2.9 KiB
Markdown
80 lines
2.9 KiB
Markdown
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# KittenOS NEO
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### efficient. multi-tasking. clean. security-oriented.
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# WARNING! STATUS: UNSTABLE!
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The first commit is after I got the installer working again after the new compression system (BDIVIDE).
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The older compression systems (which are not compatible with `heroes.lua`) are kept in preSH.tar.gz in case you want to see how NOT to do things.
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## Description
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KittenOS NEO is an OpenComputers operating system designed for Tier 1 hardware.
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This means, among other things, it has an operating overhead limit of 192KiB real-world (on 32-bit).
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Unlike the original KittenOS (now in the "legacy" branch), it is also designed with some attempt at cleanliness.
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## User Guide
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It is recommended that you take out your OpenComputers CPU, and shift-right-click until it says "Architecture: Lua 5.3", if possible.
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Then simply download the installer from inst.lua here, rename it to "init.lua" and put it on a blank disk.
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Finally, remove all other disks and reboot.
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KittenOS NEO will install itself.
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(This does not account for custom EEPROMs.)
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## Policy regarding updates
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KittenOS NEO's installer, including the full KittenOS NEO base operating system, is 65536 bytes or below.
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As the installer must be loaded in full into RAM, this is not negotiable.
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If it can't be kept this way with the current compressor, then a better compressor will have to be made.
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All kernel or security-critical `sys-` process bugs will cause an installer update.
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Other bugs will merely result in an updated copy in the repository.
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This copy will be copied to installer code if and only if another condition requires the installer code be updated.
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The code in the `code/` folder is the code meant for the installer.
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Non-installer code is in the `repository/`, (WORKING ON THIS) and thus accessible via CLAW.
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(NOTE: HTTPS is not used for this due to OC/OCEmu issues.)
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Requests for additional features in system APIs will NOT cause an installer update.
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## Building
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The tools are meant for internal use, so are thus designed to run on some generic Unix.
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Firstly, you can create a "raw installer" (uncompressed) with `mkucinst.lua`.
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This executes `tar -cf code.tar code`, which you will need to do in any case - the installer contains a compressed TAR.
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Secondly, for a compressed installer, after creating the TAR, `symsear-st1.sh`, `symsear-st2.sh`, and `symsear-st4.sh` (st3 is executed by st2) are used.
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## Kernel Architecture
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KittenOS NEO is an idea of what a Lua-based efficient microkernel would look like.
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Scheduling is based entirely around uptime and timers,
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which cause something to be executed at a given uptime.
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## Installer Architecture
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The installer is split into a generic TAR extractor frontend `insthead.lua` and a replacable compression backend (written in by relevant tools - in current versions, `heroes.lua` is where it starts).
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There was more details on this but the details changed.
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## License
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This is released into the public domain.
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No warranty is provided, implied or otherwise.
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