Software Tips
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; This routine multiplies W by tmp (8x8). Uses
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; temporary register CntDwn and stores 16bit result
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; in ACCH:ACCL.
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Mult clrf ACCL
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clrf ACCH
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clrf CntDown
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bsf CntDown,3 ;CntDown -> 8
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bcf STATUS,C
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MSum rrf tmp,F
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btfsc STATUS,C
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addwf ACCH,F
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rrf ACCH,F
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rrf ACCL,F
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decfsz CntDown,F
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goto MSum
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return
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