代碼輸入器課程設(shè)計說明書(非常好)(參考版)
2024-08-01 17:56本頁面
【正文】 退出返回到dos界面 int 21hcode endsend beg20。燈光延時 push ax push bx push cx mov cx,10000 dela0:mov bx,500 dela10:dec bx jnz dela10 loop dela0 pop cx pop bx pop ax retdelay1 endpshift_e proc 。二極管的燈左移動 push si push ax push cx push bx mov si,offset temp mov cx,3 mov bx,2 mov al,2bsss:mov bl,al mov ah,[si+bx] inc bx mov [si+bx],ah dec alloop bsss pop bx pop cx pop ax pop si retshift_l endp delay proc 。輸入到顯示在屏幕上的值 call shift_e mov al,[si+bx] mov si,offset temp1 mov [si],al retinput endpshow proc 。鍵盤按下 mov bl,bh mov bh,00h call shift_l mov al,00h mov dx,302h out dx,al mov al,[si+bx] mov dx,301h out dx,al mov si,offset temp mov [si],al retkey_press endpenter proc 。第三排鍵盤 cmp bh,04h jl next1 jnz next jmp wrnext:cmp bh,05h 。第一排鍵盤 call key_press mov si,offset pcA_0 call input call delay jmp f1pc1:mov si,offset pc_1 。DOS字符的值data endscode segmentassume cs:code,ds:databeg:mov ax,data mov ds,ax mov al,10000001b mov dx,303h out dx,al mov al,00h mov dx,302h out dx,al f1:mov al,0feh 。DOS字符ASCII值pcA_1 db 36h,37h,38h,39h,41h,42hpcA_2 db 43h,44h,45h,46htemp db 00h,00h,00h,00h 。DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATASTART: MOV AX,DATA MOV DS,AX MOV AL,81H MOV DX,CON_8255 OUT DX,AL MOV AL,00H MOV DX,C_8255 OUT DX,AL WAIT1: MOV AL,0FEH MOV BH,0d WAIT2: MOV DX,A_8255 OUT DX,AL MOV BL,AL MOV DX,C_8255 IN AL,DX TEST AL,00000001B JZ PC0 TEST AL,00000010B JZ PC1 TEST AL,00000100B JZ PC2 MOV AL,BL ROL AL,1 INC BH inc bh CMP BH,12 JZ WAIT1 JMP WAIT2 PC0: MOV SI,OFFSET PC_0 CALL KEYB_HANDLING CALL DELAY JMP WAIT1 PC1: MOV SI,OFFSET
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