指令MOVA,00H执行后A的内容一定为00H。()
指令MOVA,00H执行后A的内容一定为00H。()
相关考题:
下面那一段程序能准确地读取P1口引脚信号()。A.MOVA,#00H;MOVP1,A;MOVA,P1B.MOVA,#0FFH;MOVP1,A;MOVA,P1C.MOVA,#0FFH;MOVA,P1D.MOVA,#0FFH;MOVA,P1
单片机复位后,SP、PC、I/O口的内容为( ) A.SP = 07H PC = 00H P0 = P1 = P2 = P3 = FFHB.SP = 00H PC = 0000H P0 = P1 = P2 = P3 = 00HC.SP = 07H PC = 0000H P0 = P1 = P2 = P3 = FFHD.SP = 00H PC = 00H P0 = P1 = P2 = P3 = 00H
假设(DS)=1000H,(DI)=0400H,(10410H)=00H,下列指令执行后使(AX)=0420H的指令是( )。A.LEA AX,20[DI]B.MOV AX,OFFSET DIC.MOV AX,20[DI]D.LEA AX[DI]
已知(SP)=0100H,(SS)=0300H,(PSW)=0240H,以及00020H至00023H单元的内容分别是40H,00H,00H和01H,原来CS=0900,IP=00A2,求执行INT8指令并进入该指令响应的中断例程时,SP,SS,IP,CS,PSW和堆栈最上面三个字的内容。
单片机复位后,累加器A、PC、PSW的内容为()。A、A=FFH PC=00H PSW=FFHB、A=00H PC=0000H PSW=00HC、A=07H PC=0000H PSW=FFHD、A=00H PC=00H PSW=00H
MCS-51指令系统中,指令MOVA,@R0,执行前(A)=86H,(R0)=20H,(20H)=18H,执行后()。A、A.=86HB、B.=20HC、C.=18HD、D.=00H