基于8086的秒表設(shè)計(jì)與實(shí)現(xiàn)(編輯修改稿)
2025-07-19 18:38 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 MOV DX,INTR1 OUT DX,AL MOV AL,00000001B MOV DX,INTR1 OUT DX,AL STI mov ax,data mov ds,ax mov al,00110111b 。8253初始化 mov dx,count out dx,al mov dx,count0 mov ax,500h out dx,al mov al,ah out dx,al mov al,01110111b mov dx,count out dx,al mov dx,count1 mov ax,50h out dx,al mov al,ah out dx,al MOV AL,10000001B 。8255初始化， MOV DX,CTRL_PORT OUT DX,AL back: MOV DX,C_PORT in al,dx test al,00000010b jz b2 。判斷是否清0 again: MOV DX,C_PORT in al,dx test al,00000001b jz b1 。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 。DTA1中是秒 CMP AL,100 JZ A1 MOV BL,10 DIV BL MOV BUF,AH 。秒的個(gè)位 MOV BUF+1,AL 。秒的十位 CALL DISPLAY_DEC INC DAT1 JMP back A1: MOV DAT1,0 。滿60秒，對(duì)DAT1清0 MOV AL,0 MOV AH,0 MOV BUF,AH MOV BUF+1,AL CALL DISPLAY_DEC 。先顯示00，再進(jìn)位 INC DAT2 MOV AL,DAT2 。DAT2中是分 CMP AL,60 JZ A2 MOV BL,10 DIV BL MOV BUF+2,AH 。分的個(gè)位 MOV BUF+3,AL 。分的十位 CALL DISPLAY_DEC MOV CX,60 LOOP AGAIN A2: MOV DAT2,0 。滿60分對(duì)DAT2清0 MOV AL,0 MOV AH,0 MOV BUF+2,AH MOV BUF+3,AL CALL DISPLAY_DEC 。先顯示00：00再進(jìn)位 MOV AL,DAT3 。DAT3中是時(shí) CMP AL,24 JZ A3 MOV BL,10 DIV BL MOV BUF+4,AH 。時(shí)的個(gè)位 MOV BUF+5,AL 。時(shí)的十位 CALL DISPLAY_DEC MOV CX,60 DEC CX JZ back A3: INC DAT3 JMP back b1: CALL DISPLAY_DEC mov al,01110000b 。對(duì)825
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