run screen

Sorry, English isn’t my first language, so please excuse any mistakes.

When I read the pci address(from 80000000h), I try to determine whether it is a valid address (not equal to ffffh), and store the valid address in the variable address, and read it in the next loop. But my code doesn't seem to be able to achieve it. When reading, it does not display the stored content, but some garbled. I don't know if it's the wrong way to store or read it, I'm still new to using offset access.

.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