将pci地址存储在内存中并显示

Question

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对不起，英语不是我的母语，所以请原谅任何错误。

当我读取PCI地址（从80000000H）时，我尝试确定其是否是有效的地址（不等于FFFFH），并将有效地址存储在变量地址中，并将其读取。 但是我的代码似乎无法实现它。阅读时，它不会显示存储的内容，但有些乱七八糟。 我不知道这是存储或阅读的错误方法，我仍然是使用偏移访问的新手。

.MODEL SMALL
.486P
.DATA
;-----------------------------------------
rowx     db ?
count     db ?
address  dw 500 dup(?)
fun      db 0
bus      db ?
dev      db ?
.STACK  500
.CODE
;*****************************************

pcitool proc near
    open_11:
        mov esi,offset address
        mov edi,80000000h   
        
        mov count,0    ;Count the number of devices
        mov rowx,0     ;like 'count' 
        
    loopaa: 
        push cx
        
        mov eax,edi     ;read address
        mov dx,0cf8h
        out dx,eax
        mov dx,0cfch
        in  eax,dx
        
        cmp ax,0ffffh   ;Comparison
        jz  again1      ;if equal to ffffh move next loop
        mov eax,edi     ;else store it
        ;----------
        push eax
                
        mov  cl,16
        shr  eax,cl
        and al, 80h
        mov  bus,al        ;check bus
        
        pop eax
        push eax
        
        mov  cl,11
        shr  eax,cl
        and  al,1fh    ;check device
        mov  dev,al
        
        pop eax
        push eax
        
        mov eax,edi     ;else store it
        mov cl,8
        shr eax,cl
        and al,07h
        mov fun,al        ;check function
        
        pop eax

           ;---------------------

        inc rowx        ;add dev
        
        mov eax,edi
        shr eax,8
        mov [esi],ax
        add esi,2

        ; mov [esi],edi           ;store
        ; add esi,4               

        cmp fun,0       ;have function?
        jnz again1      ;yes -> again
        
        ; add edi,0ch     ;no function
        ; mov eax,edi     ;addr+12
        lea eax, [edi+0ch]
        
        mov dx,0cf8h            ;read
        out dx,eax
        mov dx,0cfch
        in  eax,dx
        
        sub edi,0ch     
        mov cl,16   
        shr eax,cl      
        and al,80h
        
        cmp al,0
        jnz again1
        jnz again1
        add edi,700h
        
    again1: 
        add edi,100h
        cmp edi,81000000h
        jb loopaa
        
;------------------read from memory-----------------

    opena:  
        mov esi,offset address


    loopa: 
        mov eax,[esi]
        
        mov  cl,16
        shr  eax,cl
        mov dl,al
        mov ah,02h
        int 21h

        mov  cl,11
        shr  eax,cl
        and  al,1fh    ;check device
        mov dl,al
        mov ah,02h
        int 21h

        mov cl,8
        shr eax,cl
        and al,07h
        mov dl,al
        mov ah,02h
        int 21h
        

        inc count        ;account
    again: 
        mov al,rowx
        cmp count,al
        jz endd
        add esi,4
        loop loopa         ;loop read
    
    endd:
        mov     ax,4c00h    ;esc
        int     21h
        ret

pcitool   endp