DiyOS - do it yourself

Small study Operating System

This is a very very very experimental code, no warranties, it’s for own study.

If want to compile you need a Cross-Compiler GCC.

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Latest built ISO @ build/

Latest boot screenshots

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What is done:

• Graphical Server (initial tests)
• Graphical User Interface (initial tests)
• Filesystem (/ and /dev)
• Initial RAM Disk in Tar file format. (mounted on /ram directory)
• Multitasking
• Basic Message System (IPC)
• Memory Manager
• ACPI Reboot and Shutdown
• Global Descriptor Table (GDT)
  • Flat memory
• Interrupt Descriptor Table (IDT)
  • Basic ISR (only print a message and halt)
  • IRQs
• Paging enabled
  • Low Memory (0 ~ 1MB) identity paging
  • High-Half Kernel (kernel above 0xC0000000)
  • 4MB at 0xFFC00000 fixed for Page Tables (physical memory after kernel location)
• Drivers
  • keyboard, Timer, Basic Video, PIC
  • Serial added to /dev/com file (write only)
  • Bochs VBE video
  • Basic VGA
  • Network Realtek RTL81xx
  • Network NE2000 (n2k) [working on]

To compile:

make

To create a disk iso file:

make iso

To run with Qemu:

make run