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## Object Operating System
## Install dependencies
#### Ubuntu
```sh
sudo apt update -y
sudo apt -y install build-essential binutils nasm xorriso grub-common qemu-system-i386 mtools
```
You need to build GCC cross compiler for i686 or x86_64 supports x32 architecture/s to compile from sources.
Also required gcc and stdc++ libraries.
Refer to GCC documentation for detailed information - <https://gcc.gnu.org/install/>
## Build and run
Before build the project set some variables - DEBUG and LIBS_PATH.
These variables may pass through *make* command `make *variables* *rule*`, or usage environment variables `export *name*=*value*`.
#### Variables
1. DEBUG. Takes a boolean value (true or false). Responsible for the debug version of the project to test it via GDB.
2. LIBS_PATH. Takes the path to the required (gcc and stdc++) libraries.
#### Ubuntu
Build and run release version
```sh
make all
```
Build and run debug version
```sh
make DEBUG=true all
```
## Docs
- [Link on collection of articles "How startup app without OS"][1]
- [The GNU GRUB manual][2]
- [Executable and linkable format ELF][3]
- [NASM documentation][4]
- [Article where creating a simple OS][5]
- [Multiboot specification][6]
- [GCC compiler documentation][7]
- [Using NASM in a Hello World kernel][8]
- [Video memory ports x86][9]
[1]:https://habr.com/ru/companies/neobit/articles/173263/
[2]:https://www.gnu.org/software/grub/manual/grub/grub.pdf
[3]:https://www.cs.cmu.edu/afs/cs/academic/class/15213-f00/docs/elf.pdf
[4]:https://www.nasm.us/xdoc/2.16.01/nasmdoc.pdf
[5]:https://wiki.osdev.org/Bare_Bones#Writing_a_kernel_in_C.2B.2B
[6]:https://www.gnu.org/software/grub/manual/multiboot/multiboot.pdf
[7]:https://gcc.gnu.org/onlinedocs/gcc.pdf
[8]:https://wiki.osdev.org/Bare_Bones_with_NASM
[9]:https://stackoverflow.com/questions/17367618/address-of-video-memory
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