[ORG 0] ; We dont know what the segment/offset might be, jmp 07C0h:start ; so jump to segment 07C0 ; The loading message msg db 'kryptOS 0.01 (Shane rulez!) loading...' start: mov ax, cs ; Set ds and es mov ds, ax mov es, ax mov si, msg ; Move the location of msg into si print: ; Print the message lodsb cmp al, 0 je finishedmsg mov ah, 0Eh mov bx, 7 int 10h ; Call BIOS jmp print finishedmsg: jmp hang times 510-($-$$) db 0 ; Fill the rest with zeros dw 0AA55h ; Last two bytes of boot sector must be