【正文】 黃選 《微機實驗及課程設(shè)計》報告 22 mov al,ah out dx,al shl ah,01 push cx mov cx,300h delay4: loop delay4 pop cx inc si loop loop_out jmp exit7 exit7: pop dx pop cx pop ax pop si ret disp_mat endp code ends end start 0 。紅選 mov al,00h out dx,al mov dx,protly out dx,al mov dx,proth 。01h out dx,al shl ah,01 。行選 mov al,led_in[si] out dx,al mov dx,protly 。紅選 mov al,00h out dx,al mov dx,protly 。2標(biāo)志狀態(tài)中 jz ledin cmp al,03h 。00001101,向 C口的第六位寫入 1 out dx,al pop si pop ax pop dx ret show endp 。00001110,向 C口的第七位寫入 0 out dx,al mov al,a[1] mov ah,00h mov dx,io8255a mov si,ax mov al,led[si] out dx,al mov dx,io8255b 。使相應(yīng)的數(shù)碼管亮 高位 mov al,0fh 。00001100, out dx,al mov al,a[0] mov ah,00h mov dx,io8255a 。數(shù)碼管顯示 mov dx,io8255b 。屏幕顯示剩余車位 mov ah,09h int 21h mov dl,a[0] add dl,30h mov ah,02h int 21h mov dl,a[1] add dl,30h mov ah,02h int 21h mov dl,0ah mov ah,02h int 21h mov dl,0dh mov ah,02h int 21h 《微機實驗及課程設(shè)計》報告 19 mov bh,a[0] mov bl,a[1] cmp bx,0909h jnz exit6 mov dx,offset mess7 mov ah,09h int 21h exit6: pop dx pop ax ret testb3 endp 。 testb3 proc near push ax push dx cmp state_b,03h jnz exit6 mov dx,io8255d in al,dx and al,01h jz exit6 mov al,a[1] mov ah,a[0] add al,1 aaa mov a[1],al mov a[0],ah mov state_b,00h mov dx,io8255b mov al,08h 。 testb2 proc near push ax push dx cmp state_b,02h jnz exit5 mov dx,io8253c mov al,00h out dx,al mov al,0ch 。計數(shù)器賦 2s mov al,00h out dx,al mov al,08h out dx,al jmp exit4 timecheck_b2s: mov dx,io8255d in al,dx and al,01h jz exit4 mov dx,offset mess4 mov ah,09h int 21h mov state_b,02h mov dx,io8255b 。b口開關(guān) 1撥上，監(jiān)測 a口狀態(tài) push ax push dx cmp state_b,00h jz state_b1 cmp state_b,01h 《微機實驗及課程設(shè)計》報告 17 jz timecheck_b2s jmp exit4 state_b1: mov dx,offset mess9 。換行 mov ah,02h int 21h mov bh,a[0] mov bl,a[1] cmp bx,0000h jnz exit3 mov dx,offset mess6 mov ah,09h int 21h exit3: pop dx pop ax ret testa3 endp 。屏幕顯示剩余車位 mov ah,09h int 21h mov dl,a[0] add dl,30h mov ah,02h int 21h mov dl,a[1] add dl,30h mov ah,02h int 21h mov dl,0ah 。時間到 mov al,a[1] mov ah,a[0] sub al,1 aas mov a[1],al mov a[0],ah 《微機實驗及課程設(shè)計》報告 16 mov state_a,00h mov dx,io8255b mov al,0ah 。 testa3 proc near push ax push dx cmp state_a,03h jnz exit3 mov dx,io8255d 。計數(shù)器通道 1地址 mov al,00h out dx,al mov al,04h 。00001011(C的 5號口對應(yīng)于欄桿信號 ) out dx,al exit1: pop dx pop ax ret testa1 endp 。00000010b jz exit1 mov dx,offset mess3 mov ah,09h int 21h mov state_a,02h 《微機實驗及課程設(shè)計》報告 15 mov dx,io8255b 。clk1接的是 out0，經(jīng)過兩次分頻，得出兩秒 out dx,al jmp exit1 timecheck_a2s: mov dx,io8255d 。提示有車準(zhǔn)備進(jìn)入 mov ah,09h int 21h mov state_a,01h mov dx,io8253b ?？臻e jz state_a1 cmp state_a,01h 。 testa1 proc near push ax push dx 。b口開關(guān) 1撥上，監(jiān)測 a口狀態(tài) goon3: test al,01h 。00000100 jz goon2 call testa2 goon2: call testa3 mov bh,a[0] 《微機實驗及課程設(shè)計》報告 14 mov bl