x86 Bare Metal Examples

Dozens of minimal operating systems to learn x86 system programming. Tested on Ubuntu 17.10 host. Userland cheat at: https://github.com/cirosantilli/x86-assembly-cheat

1. Getting started
2. About
3. Examples
   1. printf
   2. min
   3. No ld script
   4. BIOS
      1. putc
      2. hello world
         1. NASM
      3. newline
      4. carriage return
      5. cursor position
      6. color
      7. background
      8. scroll
         1. clear screen
      9. pixel
         1. pixel line
      10. keyboard
          1. keyboard loop
      11. disk load
          1. disk load 2
      12. detect memory
      13. tick count
   5. Initial state
   6. CPU
      1. Segment registers
         1. SS
         2. CS
      2. Interrupt
         1. int $1
         2. Interrupt zero divide
         3. Interrupt loop
      3. in
         1. in keyboard
         2. RTC
         3. PIT
            1. PIT once
         4. in beep
         5. in beep_illinois
         6. in mouse (TODO)
      4. Protected mode
         1. Segment base (TODO)
         2. IDT
            1. IDT 1
            2. IDT zero divide
            3. IDT PIT
         3. PIT protected
         4. Segmentation fault handler: memory bound, ring, RWX violations
         5. Paging
            1. Page fault
   7. Power
      1. reboot
      2. APM
         1. APM shutdown
         2. APM shutdown 2
   8. SMP
      1. Theory
      2. Example
   9. Libraries
      1. Multiboot
      2. GRUB
      3. TODO not working
         1. UEFI
   10. Misc
       1. hajji
4. Theory
   1. Modes of operation
      1. Segmentation
   2. Formats
      1. MBR
   3. IO
      1. BIOS
      2. APM
   4. PIC
   5. Debug
   6. Bibliography
5. Tests
   1. PRINT_BYTES
   2. PRINT_BYTES
6. LICENSE
7. TODO
   1. ring