汇编汇编语言课程设计-电子时钟

课程设计说明书 No.20

DAA MOV DH,AL CMP AL,60H JNE DISPLAY MOV DH,0 MOV AL,CH ADD AL,1 DAA MOV CH,AL CMP AL,12H JNE DISPLAY MOV CH,0 JMP DISPLAY AGAIN1: MOV AL,DL ADD AL,1 DAA MOV DL,AL CMP AL,60H JNE DISPLAY MOV DL,0 MOV AL,DH ADD AL,1 DAA MOV DH,AL CMP AL,60H JNE DISPLAY MOV DH,0 MOV AL,CH ADD AL,1 DAA MOV CH,AL CMP AL,24H JNE DISPLAY MOV CH,0 DISPLAY: MOV BX,OFFSET BUFFER INC BX INC BX CALL IOCLR CALL IOSET MOV AL,CH ;将小时的压缩BCD数转化为 CALL TRAN2 ;ASCII码在存储器中进行修改 INC BX MOV AL,':' ;在中间加一个字符‘：’ MOV [BX],AL

课程设计说明书 No.21

INC BX MOV AL,DH CALL TRAN2 INC BX MOV AL,':' MOV [BX],AL INC BX MOV AL,DL CALL TRAN2 CMP DH,30H ;到了30分钟不跳转，其余都跳到NEXT2 JNZ NEXT2 NEXT1: CMP DL,0 ;秒为0不跳其余跳到NEXT3 JNZ NEXT3 INC BX MOV AL,'*' MOV [BX],AL INC BX MOV AL,':' MOV [BX],AL INC BX MOV AL,')' MOV [BX],AL INC BX MOV AL,07H ;在输入缓冲区加入07H，报时 MOV [BX],AL JMP NEXT3 NEXT2:CMP DH,0 JNZ NEXT3 JMP NEXT1 NEXT3:INC BX MOV AL,'$' ;结束字符 MOV [BX],AL PUSH BX PUSH CX PUSH DX MOV DX,OFFSET BUFFER MOV AH,9 INT 21H POP DX POP CX POP BX JMP AGAIN RET

课程设计说明书 No.22

START ENDP MUL10 PROC ADD AL,AL DAA MOV CL,AL ADD AL,AL DAA ADD AL,AL DAA ADD AL,CL DAA MOV CL,AL INC BX MOV AL,[BX] ADD AL,CL RET MUL10 ENDP TRAN1 PROC MOV AL,[BX] AND AL,0FH MOV [BX],AL INC BX MOV AL,[BX] AND AL,0FH MOV [BX],AL RET TRAN1 ENDP TRAN2 PROC MOV CL,AL SHR AL,1 SHR AL,1 SHR AL,1 SHR AL,1 OR AL,30H MOV [BX],AL INC BX MOV AL,CL AND AL,0FH OR AL,30H MOV [BX],AL RET TRAN2 ENDP TIME PROC PUSH CX

课程设计说明书 No.23

PUSH AX MOV AX,25000 ;嵌套循环AX为外循环，CX为内循环 WAITED: MOV CX,24000 GOON: LOOP GOON DEC AX JNZ WAITED POP AX POP CX RET TIME ENDP IOSET PROC ;设置光标位置 PUSH AX PUSH BX PUSH DX MOV DX,0C20H ;DH=光标所在行号，DL=光标所在列号 MOV BH,00 ;BH=光标所在页号 MOV AH,02 INT 10H POP DX POP BX POP AX RET IOSET ENDP IOCLR PROC ;窗口上滚 PUSH AX PUSH BX PUSH CX PUSH DX MOV AX,0600H MOV BH,7 MOV CX,0 MOV DX,184FH INT 10H POP DX POP CX POP BX POP AX RET IOCLR ENDP COD ENDS END START

课程设计说明书 No.24