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start:
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mov al, 0x04
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mov bl, 0x05
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call multiply
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;at this point in execution, the AX register contains 0x0900.
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;more code goes here, ideally with some sort of guard against "fallthrough" into multiply.
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; somewhere far away from start
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multiply:
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mul bl ;outputs 0x0014 to ax
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ret
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