# rOSka

 - Probably useless hobby OS project
 - Targets 32bit legacy systems with graphical framebuffer
 - Boots with multiboot compatible bootloader, such as GRUB
 - Assembles with FASM
 - We'll probably use ext2 filesystem

## GRUB disk creation
 
 1. Format disk. Create ext2 partition
 2. Create directory mnt and mount your partition to it
    ```
        mkdir mnt
        sudo mount /dev/sdX1 mnt
    ```
 3. Intall grub using `sudo grub-install --target=i386-pc --removable --boot-dir=mnt/boot /dev/sdX`
 4. Create config
    ``` mnt/boot/grub/grub.cfg
        menuentry "rOSka" {
            multiboot /boot/roska.bin
            boot
        }
    ```
 5. Copy assembled kernel to `mnt/boot/roska.bin`

## extlinux disk creation

 1. Format disk. Create ext2 partition and mark it active boot partition.
 2. Add syslinux to bootloader
    `sudo dd if=/usr/lib/syslinux/bios/mbr.bin of=/dev/sdX`
 3. Create directory mnt and mount your partition to it. Add boot directory to it.
    ```
        mkdir mnt
        sudo mount /dev/sdX1 mnt
        sudo mkdir mnt/boot
    ```
 4. Install extlinux(syslinux)
    ```
    sudo extlinux --install --device /dev/sdX1 mnt/boot
    sudo cp /usr/lib/syslinux/bios/libcom32.c32 mnt/boot/
    sudo cp /usr/lib/syslinux/bios/mboot.c32 mnt/boot/
    ```
 5. Create config
    ``` mnt/boot/syslinux.cfg
        DEFAULT rOSka
        LABEL rOSka
            SAY extlinux is booting rOSka...
            KERNEL /boot/mboot.c32
            APPEND /boot/roska.bin
    ```
 6. Copy assembled kernel to `mnt/boot/roska.bin`
 7. Have no video because naughty implementation doesn't tell
    us the framebuffer address :(




Oh yeah heres a montrosity I currently use.
`fasm roska.fasm && sudo mount /dev/sdd1 mnt/ && sudo cp roska.bin mnt/boot/roska.bin && sudo umount /dev/sdd1 && sudo sync && sudo qemu-system-i386 /dev/sdd`