微機課程設(shè)計報告-交通-資料下載頁
2025-01-21 17:13本頁面
【正文】 ov ah,01h mov si,offset buffer0 d4: mov al,[si] mov bx,offset buffer1 。箭頭顯示橫向綠，列項紅 xlat mov dx,ioportC out dx,al mov al,ah cmp 20h,ah jb next0 mov dx,ioportRr out dx,alnext4:mov dx,ioportRy shl,ah inc si push cx mov cx,0fffhloop4:loop 1oop4 pop cx loop d4 jmp llllll: mov ah,1 int 16h jnz exit 。按任意鍵退出 jmp go1exit: climov bl, irq_mask_2_7 ?；謴?fù)中斷掩碼not blin al, 21hor al, blout 21h, almov bl, irq_mask_9_15not blin al, 0a1hor al, blout 0a1h, almov dx,ipreg ?；謴?fù)原中斷向量mov ax,csregmov ds,axmov ah,25hmov al,int_vectint 21hmov dx,ioport_cent+68h 。設(shè)置 tpc 卡中9054 芯片io 口,關(guān)閉中斷in ax,dxand ax,0f7ffhout dx,axmov ax,4c00hint 21hmain endpint_proc proc far 。中斷處理程序clipush dspush axpush dxmov ax,datamov ds,axmov dx,offset msg2mov ah,09hint 21hdec irq_times。倒計時減少irq_timesmov al,20h 。Send EOIout 0a0h,alout 20h,alpop dxpop axpop dsstiiretint_proc endpdisp proc near 。disp push dx push cx push ax mov ax,data mov ds,ax 。 mov dx,offset msg1 。 mov ah,09h 。 int 21h 。設(shè)di為顯示緩沖區(qū) mov bl,10 pop ax div bl mov dx,ax and ax,00ffh mov shiwei,ax mov cl,08h shr dx,cl and dx,00ffh mov gewei,dx mov si,offset Led 。置led數(shù)碼表偏移地址為SI add si,gewei 。求出對應(yīng)的led數(shù)碼 mov al,byte ptr [si] mov dx,io82551 。自8255b的口輸出 B port out dx,al mov al,01h 。 使相應(yīng)的數(shù)碼管亮 C port mov dx,io82552 out dx,al mov bx,0delay: dec bx jnz delay mov al,0 mov dx,io82552 out dx,aldelay2: dec bx jnz delay2 mov si,offset led 。置led數(shù)碼表偏移地址為SI add si,shiwei 。求出對應(yīng)的led數(shù)碼 mov al,byte ptr [si] mov dx,io82551 。8255B的口輸出 out dx,al mov al,2 。使相應(yīng)的數(shù)碼管亮c口 mov dx,io82552 out dx,al mov bx,1delay1: dec bx jnz delay1 mov al,0 mov dx,io82552 out dx,al pop cx pop dx retdisp endpcode endsend start 18 / 18
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