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# TABS
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Totaal Arbitrair BesturingsSysteem, Zeus maakt een besturingssysteem!
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## How to use
To compile, you need:
- `i686-elf-gcc` for cross-compiling the kernel
- A system `gcc` for compiling the host-helpers
- `nasm` for compiling the bootloader
- `qemu-system-i386` for emulating (`qemu-system-x86_64` will probably work too, but that is not directly supported)
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More information about installing a cross compiler can be found [here ](https://wiki.osdev.org/GCC_Cross-Compiler#The_Build ).
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If you run `make bin` , it will generate `target/boot.bin` , this is a binary file layed out as described in [the docs ](docs/bootloader.md ). To burn it on a USB drive, simply `dd if=target/boot.bin of=/dev/sdb` and the drive is bootable and contains an SFS filesystem with the files in `filesystem/` .
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In case there are errors in the bootloader you can use `make compile_kernel` to only compile the kernel.
To run TABS in the qemu simulator run `make run` .
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## Bootloader
The bootloader is self-written, based on articles on [the OSDev wiki ](https://wiki.osdev.org/ ). It's a single stage, ELF-loading bootloader in the most basic way possible.
More info in [the docs ](./docs/bootloader.md )
## Kernel
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The kernel is based on [the bare bones kernel from the OSDev wiki ](https://wiki.osdev.org/Bare_Bones ).
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### Features
- [x] Terminal output (with newlines!)
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- [x] _Very_ basic (and probably broken) memory management
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- [x] Interrupt handling
- [x] Keyboard input
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- [x] Exception handling
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- [x] Minimal shell
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- [ ] Filesystem interaction
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- [ ] Show files in directory
- [ ] Read files in directory
- [ ] Write files in directory
- [ ] Tests
- [ ] Running executables from filesystem
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- [ ] Better memory management
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- [ ] Better shell
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As a test, I've implemented day 1 of [advent of code ](https://adventofcode.com/ ) on the [AoC branch ](https://github.com/Robbe7730/RoBoot/tree/AoC ).
