EOS (Experimental Operating System)

EOS is an educational operating system for x86 platform

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:

make build-iso

• Building and running release version:

make build-iso-run

• Building debug version:

make build-iso DEBUG=1

• Building and running debug version:

make build-iso-run DEBUG=1

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

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.