lds si,[si] ; the infamous SInception move setup nop ; that was exhausting, so let's chill L: lodsb ; load ... something and al,[si+80] ; weave it logically into another thing not al ; now take the opposite, because we can mov [si],al ; store this as a new something imul si,byte 41 ; we didn't multiply yet! jmp short L ; everybody needs workout, so jump!