UP | HOME

MBR Trans Flag

What it says on the tin.

Source code download

./boot.asm, compilation and launch instructions included in file.

Binary pre-compiled file

./boot.bin (not a 1-to-1 compiled version ;). To run this, 

$ qemu-system-i386 -fda ./boot.bin

Screenshat

screenshot.png

Source code listing

;; This thing is licensed under Creative Commons Zero v1.0 Universal, which essentially means
;; "Public Domain".  (You can do anything you want without asking for permission).
;;
;; SPDX-License-Identifier: CC0-1.0
;;
;; To compile
;; $ nasm -f bin -o boot.bin boot.asm
;;
;; To run
;; $ qemu-system-i386 -fda boot.bin
;;
;; You can also run this by burning it to a floppy or a hard drive but I am not to be held
;; responsible for any lost partitions, filesystems, or bootloaders.

BITS 16

    mov ax, 0xB800
    mov es, ax
    xor di, di

    mov ax, 0xBB20
    mov cx, 80*5
    rep stosw

    mov ah, 0xDD
    mov cx, 80*5
    rep stosw

    mov ah, 0xFF
    mov cx, 80*5
    rep stosw

    mov ah, 0xDD
    mov cx, 80*5
    rep stosw

    mov ah, 0xBB
    mov cx, 80*5
    rep stosw

halt:
    cli
    hlt
    jmp halt

    ; There's still ~463 bytes free here

    times 510-($-$$) db 0
    dw 0xAA55

Validate