请问各位高手 我在写一个 PCI SCAN 的程式 可以 SCAN 到所有的 DEVICE 但是当我按 pgdn 到最後一个 DEVICE 然後再按 pgdn 程式就会死当... 可以请各位帮我 DEBUG 一下吗? 我看了很久,觉得我的逻辑并没有错误 还是我有语法哪里错了呢?感谢各位! 以下为程式码: .model small .586 .stack .data bus db 'Bus_num: $' device db 'Device_num:$' function db 'Function_num:$' test1 db 'test****************$' bus_num dd 0 dev_num dd 0 func_num dd 0 reg_num dd 0 row db ? count db 4 col_flag db 0 msg_flag db 0 .code begin: mov ax, @data mov ds, ax mov dl,0 main_func: call clear_bot call clear_head mov bus_num,0 .REPEAT mov dev_num,0 .REPEAT mov func_num,0 .REPEAT mov reg_num,0 mov msg_flag,0 mov row,3 reg_count: mov ah,02 .IF(col_flag == 0) mov dl,0 .ENDIF mov dh,row mov bh,0 int 10h mov eax,reg_num mov edx,func_num shl edx,8 or eax,edx mov edx,dev_num shl edx,11 or eax,edx mov edx,bus_num shl edx,16 or eax,edx or eax,80000000h mov dx,0cf8h out dx,eax mov cx,0cfch .REPEAT push cx mov dx,cx in ax,dx mov bx,ax ;--------- decide whether the PCI exists or not--------- .IF bx == 0ffffh .IF func_num == 0 && reg_num == 0 ;the PCI doesn`t exist jmp dev_loop .ELSEIF func_num != 0 && reg_num == 0 ;the PCI exists, and scan its functions jmp func_loop .ELSEIF func_num == 0 && reg_num != 0 || func_num !=0 && reg_num != 0 call print_hex mov dl,' ' mov ah,2 int 21h .ENDIF .ELSE .IF (reg_num == 0 && msg_flag == 0) call msg mov msg_flag,1 jmp reg_count .ENDIF call print_hex mov dl,' ' mov ah,2 int 21h .ENDIF ;------------------------------------------------------- pop cx add cx,2 .UNTIL(cx == 0d00h) mov ah,03h mov bh,0 int 10h add reg_num,4 dec count mov col_flag,1 jnz reg_count mov count,4 call clear_tail inc row mov col_flag,0 .IF row == 23 || reg_num == 256 call clear_r2 call press_key .ELSE jmp reg_count .ENDIF func_loop: inc func_num .UNTIL(func_num == 8) dev_loop: inc dev_num .UNTIL(dev_num == 32) inc bus_num .IF bus_num == 256;----------- mov dx,offset test1 mov ah,9 int 21h .ENDIF .UNTIL(bus_num == 256) exit: mov ax,4c00h int 21h press_key proc near ;------- press button to act --------- print_page: mov eax,0 int 16h cmp ah,01h; esc_key je exit cmp ah,51h; pgdn_key je func_loop ;------------------------------------- ;pgdn: func_loop ret press_key endp ;********** print out where the PCI locates on *********** ;------------------------------------ msg proc near mov ah,2 mov dl,0 mov dh,1 mov bh,0 int 10h mov dx,offset bus mov ah,9 int 21h call print_bus_num mov dx,' ' mov ah,2 int 21h mov dx,offset device mov ah,9 int 21h call print_dev_num mov dx,' ' mov ah,2 int 21h mov dx,offset function mov ah,9 int 21h call print_func_num ret msg endp ;------------------------------------- ;-------- print out BUS# --------- print_bus_num proc near mov ecx,bus_num rol cl,4 call print_out rol cl,4 call print_out ret print_bus_num endp ;--------------------------------- ;-------- print out DEVICE# --------- print_dev_num proc near mov ecx,dev_num rol cl,4 call print_out rol cl,4 call print_out ret print_dev_num endp ;--------------------------------- ;-------- print out FUNCTION# --------- print_func_num proc near mov ecx,func_num rol cl,4 call print_out rol cl,4 call print_out ret print_func_num endp ;--------------------------------- print_out proc near mov dx,cx and dl,0fh add dl,30h cmp dl,3ah jb print2 add dl,7 print2: mov eax,0 mov ah,2 int 21h ret print_out endp ;******************************************************** ;********** print out the value of registers ************ print_hex proc near rol bx,8 rol bx,4 call print_4_bits rol bx,4 call print_4_bits mov ah,2 mov dl,' ' int 21h rol bx,4 call print_4_bits rol bx,4 call print_4_bits ret print_hex endp print_4_bits proc near mov dx,bx and dl,0fh add dl,30h cmp dl,3ah jb print1 add dl,7 print1: mov eax,0 mov ah,2 int 21h ret print_4_bits endp ;******************************************************** ;****************** clear monitor *********************** clear_r2 proc near mov ah,2 mov dl,0 mov dh,2 mov bh,0 int 10h mov cx,50 clr: mov dl,' ' mov ah,2 int 21h loop clr ret clear_r2 endp clear_tail proc near mov ah,2 mov dh,row mov bh,0 int 10h mov cx,40 clr: mov dl,' ' mov ah,2 int 21h loop clr ret clear_tail endp clear_head proc near mov ah,2 mov dh,0 mov dl,0 mov bh,0 int 10h mov cx,50 clr: mov dl,' ' mov ah,2 int 21h loop clr ret clear_head endp clear_bot proc near mov ah,2 mov dh,19 cont: mov dl,0 mov bh,0 int 10h mov cx,50 clr: mov dl,' ' mov ah,2 int 21h loop clr inc dh cmp dh,25 jne cont ret clear_bot endp ;******************************************************** end begin --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 124.9.5.2 ※ 编辑: morganc 来自: 124.9.5.2 (11/01 17:39)