Tested on Ubuntu 14.04 AMD64:
sudo apt-get install bochs bochs-sdl build-essential gdb gnu-efi qemu nasm xorriso
Make all operating systems:
make
Each .S file on the top-level is an operating system!
Run the default OS on QEMU:
make run
Run a given OS:
make run RUN=min
make run RUN=bios_one_char
Use Bochs instead of QEMU:
make bochs RUN=min
Insert an USB, determine its device (/dev/sdX) with:
sudo lsblk
sudo fdisk -l
Pick the .img file that you wan to run and:
sudo dd if=bios_hello_world.img of=/dev/sdX
Then:
- insert the USB in a computer
- during boot, hit some special hardware dependant key, usually F12, Esc
- choose to boot from the USB
When you are done, just hit the power button to shutdown.
Tested on: ThinkPad T400.
Create a big.img that contains all examples that can be booted from GRUB:
make big-img
Now if you do:
sudo dd if=big.img of=/dev/sdX
you can test several examples with a single USB burn, which is much faster.
You will also want to change the boot order to put the USB first from the F12 BIOS menu. This way you don't have to hit F12 like a madman every time.
TODO: boot sectors that load STAGE2 are not working with the big image chainloader. TODO why?