Operationg System for x86 architecture Using tools gcc qemu Usage make make run Structure Memory Map Address Data ~ 0x79ff Stack 0x8000 FDD image of sector 0 0x8200 FDD image of sector 1 0x8400 FDD image of sector 2 0x26f800 ~ 0x26f8ff IDT 0x270000 ~ 0x27ffff GDT : continue... End of Memory