casinoboot

memory structure

0x7c00: bootloader
0x7e00: vbe info structure
0x8000: bios memmap # entries
0x8004: bios memmap
0x9000: 16-bit stack pointer
0xf000: stage2
0x90000: 32-bit stack pointer
0xffffffff80000000: minimum executable load address

creating mbr disk image

dd if=/dev/zero of=test.dd bs=1M count=16
parted test.dd --script mklabel msdos
parted test.dd --script mkpart primary 1MiB 5MiB
parted test.dd --script mkpart primary 5MiB 100%
fdisk -l test.dd

todo

• properly parse mbr partition table
• locate kernel on disk
• parse ELF, VADDR
• search and respond to limine requests
• uefi, gpt support
• boot menu customization, config file parsing, editing, previewing

read

• limine boot protocol
• minimal limine compatible kernel
• https://wiki.osdev.org/MBR_(x86)