微機(jī)原理模擬計(jì)算器設(shè)計(jì)課程設(shè)計(jì)畢業(yè)論文(編輯修改稿)
2024-07-25 18:25 本頁面
【文章內(nèi)容簡介】 [irq_vect+bx] mov ah,35h int 21h mov ax,es mov csreg,ax mov ipreg,bx mov bx,word ptr interrupt_line 。設(shè)置新中斷向量 mov al,byte ptr [irq_vect+bx] mov cx,cs mov ds,cx mov dx,offset int_proc mov ah,25h int 21h mov ax,data mov ds,ax mov es,ax in al, 21h 。設(shè)置中斷掩碼 mov bx,word ptr interrupt_line mov ah,byte ptr [irq_mask_0_7_table+bx] and al,ah out 21h, al in al, 0a1h mov bx,word ptr interrupt_line mov ah,byte ptr [irq_mask_8_15_table+bx] and al,ah out 0a1h, al sti 。開中斷 Reset:。initialization LEA BX,num1 CALL ClearNum LEA BX,num2 CALL ClearNum MOV byte ptr count,0 LEA BX,num1 CALL LedShowFirstRead: LEA BX,num1 CALL ReadNum CMP byte ptr operator,4 JZ Reset CMP byte ptr operator,5 JZ FunExitLoopRead: MOV DL,operator LEA BX,num2 CALL ReadNum CMP byte ptr operator,4 JZ Reset CMP byte ptr operator,5 JZ FunExit CMP DL,1 JZ FunAdd CMP DL,2 JZ FunMinusMidJmp2: JMP FirstReadMidJmp3: JMP Reset。several choice for the prior operatorFunAdd: CALL AddNum LEA BX,num1 JMP Ope2FunMinus: CALL MinusNum LEA BX,num1Ope2: CALL LedShow LEA BX,num2 CALL ClearNum LEA BX,num1 CALL ClearNum JMP FirstRead FunEqual: JMP ResetFunClear: JMP Reset FunExit: JMP ExitErrorOut:。output the error message MOV word ptr num1,0A0AH MOV word ptr num1+2,0A0AH MOV word ptr num1+4,0A0AH LEA BX,num1 call LedShowErrorGet:。reset the error status。only R and E can pass CALL key CMP DL,39。E39。 JZ FunExit CMP DL,39。R39。 JZ MidJmp3 JMP ErrorGetJudge: CMP byte ptr operator,3 JZ MidJmp2Exit: cli mov bx,word ptr interrupt_line ?；謴?fù)中斷掩碼 mov ah,byte ptr [irq_mask_0_7_table+bx] not ah in al, 21h or al, ah out 21h, al mov bx,word ptr interrupt_line mov ah,byte ptr [irq_mask_8_15_table+bx] not ah in al, 0a1h or al, ah out 0a1h, al mov bx,word ptr interrupt_line ?；謴?fù)原中斷向量 mov al,byte ptr [irq_vect+bx] mov dx,ipreg mov cx,csreg mov ds,cx mov ah,25h int 21h mov ax,data 。設(shè)置 tpc 卡中9054芯片io口,關(guān)閉中斷 mov ds,ax mov dx,word ptr io_9054base_address add dx,68h in ax,dx and ax,0f7ffh out dx,ax mov ax,4c00h int 21h 。退出ReadNum proc。if you want to use this procedure。you must provide the number address to BX PUSH AX PUSH CX PUSH DXReadin:。enter the first number PUSH BX call key 。get a char in (dl) and display it POP BX MOV AL,DL。operator symbol。plus MOV byte ptr operator,1 CMP AL,39。P39。 JZ ExitRead 。minus MOV byte ptr operator,2 CMP AL,39。M39。 JZ ExitRead 。equal MOV byte ptr operator,3 CMP AL,39。G39。 JZ ExitRead。clear MOV byte ptr operator,4 CMP AL,39。R39。 JZ ExitRead。exit MOV byte ptr operator,5 CMP AL,39。E39。 JZ ExitRead。illegal symbol CMP AL,39。039。 JB Readin CMP AL,39。939。 JA Readin。number CMP byte ptr count,6 JZ ReadinLeftMove:。mov the number MOV CX,5 MOV SI,0MoveData: MOV DL,[BX+SI+1] MOV [BX+SI],DL INC SI LOOP MoveData 。insert the number AND AL,0FH MOV [BX+5],AL call LedShow INC count JMP ReadinExitRead: MOV
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