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Minimalistic 64-bit operating system written in C and Assembly for ARMv8-A architecture from scratch

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<h1>ARM-PRos Operating System</h1>

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**A minimalistic 64-bit operating system written in C and Assembly for ARMv8-A architecture**

</div>

## Overview

**ARM-PRos** is my experimental operating system project for the ARMv8-A architecture. It's practically bare bones right now, but if I find the strength to develop this project further, I'll try to turn it into something more.

## Roadmap

- [x] UART Driver: Basic text output (puts, puthex, putc)
- [X] UART Input
- [X] String Library (`strcmp`, `strlen`, `atoi`)
- [X] Kernel Shell
- [X] Framebuffer
- [X] USB driver
- [X] Keyboard Driver
- [X] Timer Driver
- [X] SPI driver
- [X] ILI9486 SPI LCD display driver
- [ ] Interrupt Controller (GIC)
- [ ] Physical Memory Manager
- [ ] PCI Scanning
- [ ] FAT32 filesystem
- [ ] *.ELF programs
- [ ] Rings 
- [ ] Multitasking

That's it for now, but maybe I'll come up with something else

## Building from Source

Install `aarch64-linux-gnu-gcc` (or `clang` if you wanna use `dcr`) compiler using your package manager, then run build script:

```bash
chmod +x build-linux.sh
./build-linux.sh
```

Or use [dcr](https://dcr.dexoron.su)

```bash
dcr build
```

## Runing ARM-PRos

Install `qemu-system-aarch64` emulator then run this command:

```bash
./run-linux.sh
```

Or manually:

```bash
qemu-system-aarch64 \
    -M raspi3b \
    -drive file="$SD_IMG",format=raw,if=sd,index=0 \
    -kernel "$KERNEL_IMG" \
    -serial stdio \
    -display gtk
```

Or use [dcr](https://dcr.dexoron.su)

```bash
dcr run
```

**Made with ❤️ by PRoX**

</div>

ARM-PRos

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