题目内容

After execution of following two instructions “MOV A, #0FH” and “ANL A, #2CH”, the contents of the accumulator will be ( )

A. 11010111B
B. 11011010B
C. 00001100B
D. 00101000B

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Which of the following statements will add the accumulator with register R0?( )

ADD @R0, A
B. ADD A, @R0
C. ADD R0, A
D. ADD A, R0

To complement the A, we must exclusive OR() it with( )

A. 7FH
B. 80H
C. FEH
D. FFH

After execution of following 3 instructions “MOV A, #02H”, “MOV B, #04H”, and “MUL AB”, the contents of A and B will be ( )

A=02H, B=04H
B. A=08H, B=04H
C. A=08H, B=00H
D. A=00H, B=08H

()=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