![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
已知在89C51单片机中,片内RAM字节地址中存储的内容为:(30H)=38H,(38H)=40H,(40H)=48H,(48H)=90H。按顺序执行下列每条指令后,写出程序的执行结果。 MOV A,40H; (A)=( ). MOV R0,A; (R0)=( ). MOV P1,#0F0H; (P1)=( ). MOV @R0,30H; (R0)=( ).(48H)=( ). MOV DPTR,#3848H; (DPTR)=( ). MOV 40H,38H; (40H)=( ).(38H)=( ). MOV P0,R0; (P0)=( ). MOV A,@R0; (A)=( ).(R0)=( ). MOV P2,P1; (P2)=( ).