【单选题】(40H)=50H,(41H)=51H,(50H)=0ABH,(51H)=0CDH,执行以下代码后(50H)=?,(51H)=? MOV R0,40H MOV R1,41H MOV A,@R0 MOV 50H,@R1 MOV 51H,A
【简答题】若(R1)=30H,(A)=40H,(30H)=60H,(40H)=08H。分析下列程序段执行后,(R1)= ,(A)= ,(30H)= ,(40H)= 。 MOV A ,@R1 MOV @R1 ,40H MOV 40H ,A MOV R1 ,#7FH
【单选题】(A)=40H,(R0)=00H,(R1)=00H,(30H)=0ABH,(40H)=7FH。执行以下指令后,(A)=? MOV A, #30H MOV R0,A MOV 40H,@R1 MOV A,@R1
【简答题】若(R1)=30H,(A)=40H,(30H)=60H,(40H)=08H。分析单片机执行下列程序段后,(R1)=( ),(A)=( ),(30H)=( ),(40H)=( ) MOV A,@R1 MOV @R1,40H MOV 40H,A MOV R1,#7FH