section .multiboot noalloc noexec nowrite progbits align=4 MULTIBOOT_PAGE_ALIGN equ 1<<0 MULTIBOOT_MEMORY_INFO equ 1<<1 MULTIBOOT_VIDEO_MODE equ 1<<2 MULTIBOOT_USE_ADDR equ 1<<16 MULTIBOOT_HEADER_FLAGS equ MULTIBOOT_PAGE_ALIGN | MULTIBOOT_MEMORY_INFO MULTIBOOT_CHECKSUM equ -(0x1BADB002 + MULTIBOOT_HEADER_FLAGS) dd 0x1BADB002 dd MULTIBOOT_HEADER_FLAGS dd MULTIBOOT_CHECKSUM section .reserve alloc noexec write nobits