题目内容

()=BAH and ()=0. After execution of instruction “SUBB A, #64H”, the status of CY and OV flags will be ( )

A. (CY)=0, (OV)=0
B. (CY)=0, (OV)=1
C. (CY)=1, (OV)=0
D. (CY)=1, (OV)=1

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()=65H and ()=0. After execution of instruction “SUBB A, #78H”, the contents of A will be( )

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