60 lines
2.6 KiB
Markdown
60 lines
2.6 KiB
Markdown
# BlankOS
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Rewritten monolithic version of Blank OS for the x86 processor architecture. Features a framebuffer, serial port driver, GDT, IDT. The OS relies on an old, legacy version of GRUB as the bootloader (eltorito). This *should* be GRUB 2 compatible. Emulation was tested on Arch Linux 6.9.7-arch1-1. The long-term goal of this OS is to be capable of running user programs and having its own complete kernel C library so that users can write their own C programs to be ran using the kernel.
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Next steps for this project will be:
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- ISRs and making the PIC work
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- Keyboard driver
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- User programs
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- Shell
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- Kernel libc
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- Filesystem support
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## Usage
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### Dependencies
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For Debian-based distros:
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```
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sudo apt install gcc nasm make bochs
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```
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Then change `display-library` to `sdl2` in the `bochsrc.txt` file.
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For Arch-based distros:
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```
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sudo pacman -S nasm gcc make
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git clone https://aur.archlinux.org/bochs.git
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```
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Then follow [these](https://bbs.archlinux.org/viewtopic.php?id=178479) instructions to compile Bochs with X support. Alternatively you can use Bochs with SDL but you'll have to change the `bochsrc.txt` file accordingly.
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## Building and running
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```
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git clone https://github.com/xamidev/blankos
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make
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make run
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```
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This will start a new Bochs debugger instance. To proceed with the kernel execution, you will have to type `c` in the shell spawning Bochs. Serial output will be saved under the `com1.out` file, this way you can debug the kernel by viewing its log messages. To quit, type `q`. Feel free to open issues or pull requests.
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## Running on real hardware
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To run the OS on real hardware, you'll first need to have a BIOS-compatible computer. Some of the new laptops with graphical "BIOSes" only support UEFI now. So make sure to get a computer that can boot into BIOS mode, **not UEFI mode**. Then, switch the boot mode to "Legacy" in your BIOS utility.
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Then, use the Makefile target `real` to build a "real"-capable ISO disk image. The image will have GRUB2 installed on it, using the `grub-mkrescue` utility (make sure to install it before) which is dependent on `xorriso` (install it too).
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Once the ISO file is generated, you can write it on a disk using this command:
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```
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sudo dd bs=4M if=blankos.iso of=/dev/sdX status=progress oflag=sync
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```
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Replace `sdX` with your USB drive name (you can find it by doing `sudo fdisk -l`).
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Tada! You now have a working BlankOS USB stick. Go ahead and try it out!
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### ⚠️ Disclaimer
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This is a hobbyist operating system kernel and it comes without any warranty whatsoever! It isn't capable of anything really. Feedback and contributions are highly appreciated!
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