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Index > DOS > compile error A2070: invalid instruction operands

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Q2



Joined: 21 Jan 2006
Posts: 1
Q2
Hi,

does anybody know which exactly is wrong here? compiler gives me an
Code:
error A2070: invalid instruction operands    


Programm should count from 0 to 255 and output actual number. Theoretically very simple. Rolling Eyes

Code:
.MODEL small 

.CODE

        mov CL,0 ; initialize

        mov AL,CL ; output
        mov AH,02H
        int 21H

START:

        inc CL ; incrementing     

        mov AL,CL ; output
        mov AH,02H
        int 21H        

        mov AL,CL ; max. 256 outputs
        cmp AL,255   
        jne START

        .EXIT
    
Post 21 Jan 2006, 21:18
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daluca



Joined: 05 Nov 2005
Posts: 86
daluca
i see you are using .MODEL so are you a FASM user?
i now fasm don't give errors like "A2070"
and i think that the 02H function of int 21 for character output takes the
character in dl not al the code in fasm is like:
Code:
org 100h
mov CL,0 ; initialize

        mov dl,CL ; output
        mov AH,02H
        int 21H

START:

        inc CL ; incrementing

        mov dl,CL ; output
        mov AH,02H
        int 21H

        mov dl,CL ; max. 256 outputs
        cmp dl,255
        jne START
ret                
    

you see i sustitude the al for dl this works fine in my machine
but your question is about the compiler giving an error
if you are usin masm i think you have to use the linker too
and maybe somethin like end START i realy don't have much
experince with masm.
Post 22 Jan 2006, 08:12
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