算初值Р五、读程序写结果(共2题每题5分) 10分Р1. 已知(30H)=0AEH,(40H)=0D7H,执行下列程序写出结果(30H)= ( )Р MOV A,30HР XCH A,40HР ANL A,#0FHР MOV 30H,AР2. 已知内存中存放的为无符号数(30H)=0CEH,(31H)=0B8H,(40H)=04FH,Р(41H)=5DH,执行下列程序写出结果(30H)= ( ),(31H)=( )Р MOV R2,#02Р MOV R0,#31HР MOV R1,#41HР CLR CРL1: MOV A,@R0Р SUBB A,@R1Р MOV @R0,AР DEC R0Р DEC R1Р DJNZ R2,L1 Р六、运行程序写出结果(共2题每题5分) 10分Р3.执行下列程序写出结果(A)= ( )Р MOV R2,#04Р?MOV A,#00Р?MOV R1,#01РL1:ADD A,R1Р RL AРINC R1РDJNE R2,L1Р4. 已知(A)=67H,执行下列程序写出结果(A)= ( )РMOV?R2,#08РMOV?R1,AРCLR?CРL1:MOV?A,R1Р?RLC?AР?MOV?R1,AР?MOV?A,R0Р?RRC?AР?MOV?R0,AР?DJNZ?R2,L1Р?Р一、是非判断题Р1.√Р2. ΧР3. √Р4. ΧР5. ΧР6. √Р7. ΧР8. ΧР9. ΧР10. ΧР二、选单题Р1.(D )Р2. (C )Р3. (A )Р4. (C )Р5.(C ) Р6. (D )Р7.(D)Р多选题Р1.ABCР2.BCDР3. BC Р4.CDР计算题Р1. 1)89H 2)47HР2. 1/12微秒 1/2微秒Р3. 206Р Р读程序写结果Р(30H)= (07 )Р2. (30H)= ( 7FH),(31H)=5BH
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