• 2022-06-28
    在80C51系列单片机的片内RAM中,已知(30H)=38H,(38H)=40H,(40H)=48H,(48H)=90H,试分析下段程序,说明源操作数的寻址方式,按顺序执行指令之后的结果。请写在每条指令后,以解释的方式给出答案MOVA,40HMOVR0,AMOVP1,#0F0HMOV@R0,30HMOVDPTR,#1246HMOV40H,38HMOVR0,30HMOV90H,R0MOV48H,#30HMOVA,@R0MOVP2,P1