MOV A,#87H MOV A,#99H (A)=20H,(CY)=1,(AC)=1,(OV)=1上述两数当做无符号数相加其和为288; 作为有符号数-121.一个是-103.其和-224.那288.-121,-103是怎么来的呀.还有(A)=20H是怎么算呀.急.在此非常感谢辅导.
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谁看的懂这个?麻烦给注释下MAIN:MOV R0,#91H MOV A,@R0 MOV R6,A INC R0 MOV A,@R0 MOV R7,A MOV R4,#00H MOV R5,#55H LCALL Q0ACA MOV R4,#03H MOV R5,#0E8H LCALL Q0ADC MOV A,R7 CJNE A,03H,MAIN MOV A,R6 CJNE A,02H,MAIN MOV R0,#78H MOV A,@R0 MOV R6
MOV A,#00H DEC A DEC A MOV 18H ,A(18H)=
1.下列指令中,错误的指令是( ). A.MOV A,@R1 B.MOV 41H,@1.下列指令中,错误的指令是( ).A.MOV A,@R1B.MOV 41H,@R1C.MOV RO,@R1D.MOV 41H,42H
3.下列指令中哪条是正确的( ) A.MOV DS,0200H B.MOV AX,[SI][DI] C.MOV BP,AX D.MOV BYTE PTR [BX]
MOV R1,#40H;MOV A,@R1;RL A;MOV R0,A;RL A;RL A;ADD A,RO; MOV @R1,AQIZHONG40H单元的内容变成什么了当40H为08H时,则40H变为多少
怎样解释单片机指令?MOV A#100:MOV A@30H:ADD A,#2:INC A:DJNZ A,DD:
写出每条汇编指令执行后,相关寄存器中的值 mov ax,62627 AX= mov ah,31h AX= mov al,23h AX= add ax,axmov ax,62627 AX= mov ah,31h AX= mov al,23h AX= add ax,ax AX=mov bx,826ch AX=mov cx,ax AX=mov ax,bx A=add ax,bx A=mov al,bh A=add ah,ah
1.MOV [BX],SI 2.MOV CX,AX 3.LEA BL,A 4.MOV BL,200H 5.LEA DI,A[SI]
MOV P1,单片机的,还有个MOV A,P1
2、阅读下列程序,说明其功能.MOV R0,#30H MOV A,@R0 RL A MOV R1,A RL A RL A ADD A,R1 MOV @R0,A
MOV R2,R7 MOV A,@R2 DEC DPTR CPL 2FH MOV 20H.7,F0 PUSH DPTR MOV PC,#2000H 判断下列指令是否合乎规定说明理由
单片机借位 怎么回事 clr c mov a,#56h subb a,#0f8h mov 40h,a (40h)=?详细过程
本门课程是微型计算机原理与接口技术 1.下列指令中,错误的指令是( ).A.MOV本门课程是微型计算机原理与接口技术1.下列指令中,错误的指令是( ).A.MOV A,@R1B.MOV 41H,@R1C.MOV RO,@R1D.MOV 41H,42H
单片机语言求解释,每一行是什么意思,谢谢啊,感激不尽org 0000h sjmp start org 0030hstart: mov a,#0ffh mov p1,a mov a,#0fehloop1: mov p1,a lcall delay rl a cjne a,#07fh,loop1loop2: mov p1,a lcall delay
判断与简单1,下面指令中20H所表示的含义相同吗?为什么?MOV A,#20H;MOV 30H,20H;MOV C,20H.O;MOV C,20H;2,若(R1)=20H,(A)=40H,(30H)=60H,(40H)=08H.试分析执行下列程序段后上述各单元内容的变化.MOV A, @R1MOV @R1, 40H
单片机 MOV DPTR,#1600H MOVX A,@DPTR MOVX @DPTR,A
以下秒表控制系统程序是液晶显示,请高手改成二级晶体管显示.TCNTA EQU 30H TCNTB EQU 31H SEC EQU 32H KEYCNT EQU 33H SP1 BIT P3.5 ORG 00H LJMP START ORG 0BH LJMP INT_T0 START:MOV KEYCNT,#00H MOV SEC,#00H MOV A,SEC MOV B,#10 DIV A
单片机程序分析题求解答 MOV A,# 00H DEC A DEC A MOV 18H,A (18H) =设(20H)=74H,(21H)=96H执行下列程序段MOV 30H,20HANL 30H,#1FHMOV A,21HSWAP ARL AANL A,#0E0HORL 30H,A (30H)=_______