changelog.txt

26-03-2023: 06:25 PM IST
* Initial Commit
* Added Makefile
* Added boot.s
* Added link.ld
* Added system.h
* Added system.c
* Implemented reboot
* Implemented port IO

26-03-2023: 08:48 PM IST v0.23.03.1ALPR
* Implemented serial IO
* Fixed some typos
* Updated Makefile
* Deleted object files

26-03-2023: 09:44 PM IST v0.23.03.2ALPR
* Implemented vga textmode
* Implemented scrolling
* Updated Makefile
* Incremented kernel version
* Added new welcome message

26-03-2023: 10:37 PM IST v0.23.03.2ALPR
* Implemented some functions of string lib
* Moved reboot function to its own file
* Updated Makefile
* Removed system.c
* Updated system.h

27-03-2023: 06:45 PM IST v0.23.03.3ALPR
* Implemented most of string operations
* Updated system.h
* Incremented kernel version
* Updated README.md

27-03-2023: 07:23 PM IST v0.23.03.4ALPR
* Implemented vsprintf, sprintf, and printf
* Incremented kernel version
* Updated README.md
* Updated system.h
* Updated string.h
* Updated Makefile

27-03-2023: 08:11 PM IST v0.23.03.5ALPR
* Implemented GDT
* Incremented kernel version
* Updated README.md
* Updated Makefile

28-03-2023: 07:55 PM IST v1.23.03.6NR
* Major update
* Implemented IDT
* Implemented interrupt handler
* Implemented exception handler
* Implemented driver for PIC
* Implemented driver for PIT
* Implemented stack tracing
* Moved kernel_panic and other debug functions to debug.c
* Updated boot.s
* Fixed the return value in serial.c
* Updated system.h
* Incremented kernel version
* Updated Makefile
* Updated README.md

29-03-2023: ??:?? ?? IST v1.23.03.6NR
* New README.md from @harry260 [Thanks]

30-03-2023: 08:01 PM IST v2.23.03.7NR
* Major update
* Made the kernel higher half
* Implemented PMM
* Implemented Paging
* Implemented dynamic memory allocator
* Implemented stack tracing with symbol lookup
* Split boot.s to boot.asm and multiboot.s
* Added serialprintf() to print formatted string to serial port
* Updated link.ld
* Updated exception handler to print stack trace after an exception occurs
* Added new script get_symbols.sh to get symbols from the kernel and put them into symbols.c
* Updated kernel.c
* Incremented kernel version
* Updated README.md

03-04-2023: 02:23 PM IST v3.23.04.1NR
* Major update
* Fixed a bug in PMM
* Implemented function to retrieve cpuinfo
* Implemented a driver for keyboard
* Implemented a new shell
* Removed debug symbol support
* Added a new data structure 'list'
* Implemented a new Pseudorandom number generator
* Added new string operators
* Updated link.ld
* Fixed all warnings except one in serial.c
* Added a function to read timestamp counter
* Added a function to measure cpu clock speed
* Updated textmode driver
* Updated Makefile
* Incremented kernel version
* Implemented a function to dump contents of a memory address to screen or serial port

08-04-2023: 09:30 PM IST v4.23.04.2NR
* Major update
* Implemented VFS
* Implemented SORFS
* Implemented tree structure
* Implemented slow ata driver
* Implemented mbr partition probing
* Implemented ramdisk
* Implemented devfs
* Implemented kernelfs
* Implemented filesystem detection function
* Created tools for making and extracting sorfs disk image
* Can access sorfs disk image loaded using module command in grub
* Implemented PCI driver
* Fixed some bugs in vga_text driver
* Fixed a bug in strstr function in string.c
* Implemented random motd printing
* Implemented zalloc to allocate memory initialized with 0
* Updated Makefile
* Updated kernelmain.c
* Incremented kernel version

09-04-2023: 05:06 PM IST v4.23.04.3NR
* Implemented a function for switching to usermode
* Implemented task state segment
* Added new functions to gdt.c and idt.c to reinitialize the gdt and idt
* Fixed a bug in gdt.c
* Added new functions in bit.c
* Updated math.c
* Updated kernel.c
* Incremented kernel version
* Updated Makefile
* Updated README.md