Simple OS

Description

Test OS project for x86_32 platform. (documentation)

Tools

The project was made on Debian 12

• GCC (13.2.0)
• NASM (2.16.01)
• GNU Make (4.3)
• GNU ld (2.42)
• GNU ar (2.42)
• truncate (9.4)
• QEMU emulator (8.2.1)
• GNU GRUB (2.12-1)

License

MIT License

Copyright (c) 2024 Alexander (@alkuzin)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Updates history

simple-os (v0.0.1):

• added kmain()
• added kernel library libk (<string.h>, <ctype.h>, <stddef.h>, <stdint.h>)
• added text output to VGA

simple-os (v0.0.2):

• added kprintf() function (%#xXidpusc options of standard C library printf)
• added to libk <stdarg.h>, <memory.h>, <math.h>

simple-os (v0.0.3):

• added VGA driver
• added color printing function kprintc() with 16 colors

simple-os (v0.0.4):

• added ksleep() & __ksleep() functions in <kernel.h>
• modified VGA driver (added new functions: update_cursor(), port_byte_out())
• added default background and foreground colors in kernel/tty.h
• added VGA scrolling (__kscroll())

simple-os (v0.0.5):

• added \v \t \r \b special characters support in kputchar()
• define a signed integer types in <stdint.h>
• added kvprintf() function
• added kernel halt khalt() & kernel panic kpanic() for detecting errors
• added Global Descriptor Table

simple-os (v0.0.6):

• added ports in <ports.h>
• added TSS (Task State Segment) entry in <gdt.h>
• added IDT (Interrupt Descriptor Table) in <idt.h>
• added GNU GRUB support
• added IRQ (Interrupt Request) in <irq.h>

simple-os (v0.0.7):

• added PIT (Programmable Interval Timer) in <timer.h>
• added keyboard driver in <keyboard.h>

simple-os (v0.0.8):

• added multiboot information structure in <multiboot.h>
• added physical memory manager in <pmm.h>
• added virtual memory manager in <vmm.h>
• added main memory manager in <mm.h>

simple-os (v0.0.9):

• added kmalloc() & kfree() functions for dynamic memory allocation
• added option to set default color
• added keyboard_wait() & keyboard_getchar() functions in keyboadrd.h
• added kernel shell in ksh.h
• added simple-os standard functions in sstd.h