SnackbarOS

What is this?

Snackbar is my weekend time wasting project. Currently it targets the x86 arch but I might move to ARM later since I've been wanting to work on raspberry pi baremetal for a while. No promises.

Building

Prerequisites

Netwide Assembler
genisoimage (part of cdrtools on Arch-linux)
Bochs (you can use qemu, but you'll have to configure it yourself)
Masochist mindset

Cross-compiler

First and foremost, you will need a cross-compiler. You can find the build instructions for it on osdev (grab some popcorn and a few gallon of soda cuz compiling a cross-compiler is one hell of a screen time journey)

^{^{or you can just download an existing build & show some mercy to whatever hair left on your head}}

Bochs Config

All of the bochs configuration files are in the bochs folder. Be sure to edit romimage & vgaimage paths according to your installation and OS.

The debug.rc file is used to tell bochs to continue execution instead of dropping into interactive debugger as soon as in starts.

Make

Edit makefile and set BIN_DIR to your cross-compiler s bin directory. Once that's done, you can finally start building

make run

This will build the OS, do all the necessary setups and startup bochs with snackbarOS iso inserted. You can find the OS iso, kernel elf file and all object files in the build directory once the build finishes.

Be aware, make clean will delete the build directory

Contributing

If you value your sanity, don't. Look for better hobbies. If not then I guess we will meet in a psychiatric ward someday ~

Authors

Planning: Me.
Developing: Also me.
Testing: Hey look, its me again!

Acknowledgement

Hat tip to James Molly, the cool people at OSDev forum & OSDev subreddit, OSDev wiki, Erik Helin, Adam Renberg and last but not least, Brandon Fresen.

Log

27/9/18: A messy hello world OS (newlines, tabs, colored text supported)
28/9/18: An attempt to properly structure the project. Moved outb, inw, inb to common.h
29/9/18: Finally setup a i686-elf cross compiler & improve the makefile, start using gcc stdint.h instead of makeshift ministdint.h
30/9/18: A proper README with some build instructions. More rearrangements. Moved kernel level I/O functions to kstdio.h, separated VGA methods and declarations to vga.h, starting work on standard string.h
1/10/18: Implemented memcpy, memcmp
2/10/18: Implemented itoa
6/10/18: Implemented serial output interface. Added simple serial_printf for formatted debug printing
18/10/18: GDT implemented, finally. Next up, IDT & keyboard...yay :D

ratulrafsan/SnackbarOS