基于8086的秒表設(shè)計(jì)與實(shí)現(xiàn)課程設(shè)計(jì)-閱讀頁(yè)
2025-07-13 00:22本頁(yè)面
【正文】 OUT DX,AL MOV AL,00000001B MOV DX,INTR1 OUT DX,AL STI mov ax,data mov ds,ax mov al,00110111b 。8255初始化， MOV DX,CTRL_PORT OUT DX,AL back: MOV DX,C_PORT in al,dx test al,00000010b jz b2 。判斷是暫停還是繼續(xù)？ mov cx,6 jia6: inc si loop jia6 MOV AL,00000000B MOV DX,C_PORT OUT DX,AL MOV AL,DAT1 。秒的個(gè)位 MOV BUF+1,AL 。滿60秒，對(duì)DAT1清0 MOV AL,0 MOV AH,0 MOV BUF,AH MOV BUF+1,AL CALL DISPLAY_DEC 。DAT2中是分 CMP AL,60 JZ A2 MOV BL,10 DIV BL MOV BUF+2,AH 。分的十位 CALL DISPLAY_DEC MOV CX,60 LOOP AGAIN A2: MOV DAT2,0 。先顯示00：00再進(jìn)位 MOV AL,DAT3 。時(shí)的個(gè)位 MOV BUF+5,AL 。對(duì)8253送GATE1控制信號(hào) mov dx,c_port out dx,al call cunchu CALL DELAY jmp back b2: mov dx,c_port in al,dx test al,00000100b jnz li call xianshicj call display_dec mov cx,1 jz next2 mov si,6 dec cx next2: call delay jmp back li: mov buf,0 。 mov bx,1000 。對(duì)8253送GATE0控制信號(hào) mov dx,c_port out dx,al CALL DELAY 。以十進(jìn)制顯示 MOV AL,[BX][SI] 。共陽(yáng) MOV DX,A_PORT OUT DX,AL 。位選，1點(diǎn)亮 MOV AH,0 MOV DX,B_PORT OUT DX,AL CALL DELAY MOV AL,0H 。取十位段碼 not al MOV DX,A_PORT OUT DX,AL 。取分個(gè)位段碼 not al MOV DX,A_PORT OUT DX,AL 。取分十位段碼 not al MOV DX,A_PORT OUT DX,AL 。取時(shí)個(gè)位段碼 not al MOV DX,A_PORT OUT DX,AL 。取時(shí)十位段碼 not al MOV DX,A_PORT OUT DX,AL
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