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https://github.com/rgimad/EOS

EOS is an educational operating system for x86 platform
https://github.com/rgimad/EOS

asm c kernel osdev

Last synced: 2 days ago
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EOS is an educational operating system for x86 platform

Host: GitHub
URL: https://github.com/rgimad/EOS
Owner: rgimad
License: mit
Created: 2019-08-10T11:50:33.000Z (about 5 years ago)
Default Branch: master
Last Pushed: 2023-01-01T15:58:50.000Z (almost 2 years ago)
Last Synced: 2024-08-02T15:34:00.114Z (3 months ago)
Topics: asm, c, kernel, osdev
Language: C
Homepage:
Size: 4.28 MB
Stars: 119
Watchers: 6
Forks: 5
Open Issues: 1
Metadata Files:
- Readme: README.md
- License: LICENSE

Awesome Lists containing this project

README

# EOS (Experimental Operating System)

**EOS** is an educational operating system for x86 platform

![Screenshot](https://raw.githubusercontent.com/rgimad/EOS/master/screenshots/screenshot1.png "Screenshot")

## Current status

- GDT and IDT setup
- VESA framebuffer based terminal :D
- PS/2 keyboard and mouse support
- RAM detection and Physical Memory Manager
- Higher Half Kernel

The kernel starts at virtual address 0xC0100000

0xC0000000-0xC0400000 and 0x00000000-0x00400000 vitual addresses are mapped to one physical range - to 0x00000000-0x00400000
- Virtual Memory Manager
- Entry based kernel heap manager (kmalloc/kfree/krealloc)
- Very simple kernel command shell (KSH)
- VFS
- Initrd, uses TarFS
- MENUET01 and PE executables loaders
- System call mechanism

## TODO
- User-mode and multitasking
- Synchronization (mutex, spinlock)
- FAT32 driver
- HDD driver
- PCI driver
- ACPI driver
- etc.

## Building and debugging
Go to src/kernel

- Building *release* version:

```Shell
make build-iso
```

- Building and running *release* version:

```Shell
make build-iso-run
```

- Building *debug* version:

```Shell
make build-iso DEBUG=1
```

- Building and running *debug* version:

```Shell
make build-iso-run DEBUG=1
```

- Always do following command before switching between debug and release configurations:

```Shell
make clean
```

## Thanks to

- Guilherme Samora (psamora)
- Nikita Ivanov, Dmitrii Kychanov, etc. from u365
- wiki.osdev.org
- Arjun Sreedharan
- Stephen Fewer (stephenfewer)
- James Molloy
- levex named user from gihtub
- reddit /r/osdev
- Stackoverflow
- etc.