微機(jī)原理及接口技術(shù)課程設(shè)計(jì)-簡(jiǎn)易教學(xué)打鈴器設(shè)計(jì)-資料下載頁(yè)
2025-06-06 20:18本頁(yè)面
【正文】 址 MOV ES:[DI],AX MOV DX,INTR_OCW1 ?；謴?fù)INTR原中斷屏蔽寄存器的屏蔽字 MOV AL,IM_BAK OUT DX,AL STI MOV AX,4C00H 。返回到DOS INT 21HMYISR PROC NEAR 。中斷處理程序MYISR MOV AX,DATA MOV DS,AX INC COUNT CMP COUNT,30 JNZ OVER MOV COUNT,0 INC SEC CMP SEC,10 。計(jì)時(shí)值自增，到10即歸0 JNE DIS MOV SEC,0 add MIN,1 CMP MIN,10 JNE DIS MOV MIN,0 add HOUR,1DIS: MOV AX,SEC 。完成秒計(jì)時(shí)值的顯示 CALL DECSHOW MOV AX,0E0DH ?；剀?chē)，置光標(biāo)到行首 INT 10HOVER: MOV DX,PCI_INTCSR SUB DX,19H IN AL,DX MOV DX,PCI_INTCSR 。清PCI卡中斷控制寄存器標(biāo)志位 ADD DX,2 MOV AX,003FH OUT DX,AX MOV DX,INTR_OCW2 。向PC機(jī)內(nèi)部8259發(fā)送中斷結(jié)束命令 MOV AL,20H OUT DX,AL MOV AL,20H OUT 20H,AL IRETMYISR ENDPDECSHOW PROC NEAR MOV AX,DATA MOV DS,AX MOV AX,HOUR MOV DX,0 。完成時(shí)計(jì)時(shí)值的顯示 MOV BX,10 DIV BX ADD AL,30H 。顯示計(jì)時(shí)值十位 MOV AH,0EH INT 10H ADD DL,30H 。顯示計(jì)時(shí)值個(gè)位 MOV AL,DL MOV AH,0EH INT 10H mov al,3ah mov ah,0eh int 10h MOV AX,MIN MOV DX,0 。完成分計(jì)時(shí)值的顯示 MOV BX,10 DIV BX ADD AL,30H 。顯示計(jì)時(shí)值十位 MOV AH,0EH INT 10H ADD DL,30H 。顯示計(jì)時(shí)值個(gè)位 MOV AL,DL MOV AH,0EH INT 10H mov al,3ah mov ah,0eh int 10h MOV AX,SEC MOV DX,0 。完成秒計(jì)時(shí)值的顯示 MOV BX,10 DIV BX ADD AL,30H 。顯示計(jì)時(shí)值十位 MOV AH,0EH INT 10H XOR BX,BX MOV BL,DL ADD DL,30H 。顯示計(jì)時(shí)值個(gè)位 MOV AL,DL MOV AH,0EH INT 10H MOV DX,MY8255_A 。寫(xiě)A口 MOV AX,DATA1 MOV ES,AX LEA DI,VALUE 。ES: DATA1, DI: VALUE MOV AL,ES:[DI+BX] OUT DX,AL RETDECSHOW ENDPCODE ENDS END START
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