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2025-07-04 18:25本頁(yè)面
【正文】 retAddNum endpMinusNum proc。mov the number MOV CX,5 MOV SI,0MoveData: MOV DL,[BX+SI+1] MOV [BX+SI],DL INC SI LOOP MoveData 。 JA Readin。 JB Readin CMP AL,39。illegal symbol CMP AL,39。E39。 JZ ExitRead。clear MOV byte ptr operator,4 CMP AL,39。G39。 JZ ExitRead 。minus MOV byte ptr operator,2 CMP AL,39。P39。operator symbol。enter the first number PUSH BX call key 。if you want to use this procedure。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 。恢復(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 。R39。E39。reset the error status。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:。開中斷 Reset:。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 tpc 卡中9054芯片io口,使能中斷 in ax,dx or ax,0900h out dx,ax mov bx,word ptr interrupt_line 。初始化8253 add dx,TIM_CTL MOV AL,MODE03 OUT DX,AL MOV DX,word ptr io_base_address add dx,TIMER0 MOV AL,00h OUT DX,AL MOV AL,02H OUT DX,AL MOV DX,word ptr io_base_address add dx,TIM_CTL MOV AL,MODE12 OUT DX,AL MOV DX,word ptr io_base_address add dx,TIMER1 MOV AL,0aH OUT DX,AL MOV AL,00 OUT DX,AL MOV DX,OFFSET MESS MOV AH,09 INT 21H MOV DX,OFFSET MES 。Enable Local Interrupt Input.386 cli mov ax,data mov ds,ax mov es,ax mov ax,stacks mov ss,ax call findtpc 。,0ah,0dh,39。,0ah,0dh db 39。 mes db 39。 table1 dw 0101h,0102h,0104h,0108h,0110h,0120h,0140h,0180h dw 0201h,0202h,0204h,0208h,0210h,0220h,0240h,0280h dw 0401h,0402h,0404h,0408h,0410h,0420h,0440h,0480h char db 39。新的中斷掩碼,中斷07時(shí)全一,中斷815時(shí)從低至高相應(yīng)位為零 INTMASK DB ? LED DB 3FH,06,5BH,4FH,66H,6DH,7DH,07,7FH,6FH,40H DB 0AH,0DH,39。新的中斷向量,中斷07的向量為:08h0fh,中斷815的向量為:70h77h irq_mask_0_7_table db 011111110b,011111101b,011111011b,011110111b db 011101111b,011011111b,010111111b,001111111b db 011111011b,011111011b,011111011b,011111011b db 011111011b,011111011b,011111011b,011111011b 。$39。8253A TIMER1 IN MODE2! COUNT=0aH39。8253A TIMER0 IN MODE3! COUNT=0200H39。$39。$39。TPC pci card Interrupt Line : 39。$39。TPC pci card I/O Base Address : 39。$39。TPC pci card 9054 Chip I/O Base Address : 39。$39。TPC pci card not find or address/interrupt error !!!39。TPC卡I/O基地址暫存空間 interrupt_line db 2 DUP(0) 。舊中斷向量保存空間 io_9054base_address db 4 DUP(0) 。數(shù)碼管端口地址 PORTBIT EQU 210H200H pa55 equ 218h200H 。8253端口地址 TIMER0 EQU 200H200H TIMER1 EQU 201H200H MODE03 EQU 36H 。TPC卡廠商ID IO_PLX_SUB_ID EQU 0905410B5H 。 io_plx_device_id equ 05406h 。386以上微機(jī)適用。 這4個(gè)端口地址由最低2位地址碼AA0來(lái)選擇。A1A0：端口選擇信號(hào)，由CPU輸入。 ／寫控制 8253111098765432D71D6D5D4D3D
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