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org 07c00h
mov ax,cs
mov ds,ax
mov es,ax
call Dispstr
jmp $
Dispstr:
mov ax,BootMessage
mov bp,ax
mov cx,16
mov ax,01301h
mov bx,000ch
mov dl,0
int 10h
ret
BootMessage:
db "Hello, OS world!"
times 510-($-$$) db 0
dw 0xaa55