compile error A2070: invalid instruction operands

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Q2

Joined: 21 Jan 2006
Posts: 1

Q2 21 Jan 2006, 21:18

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

21 Jan 2006, 21:18

daluca

Joined: 05 Nov 2005
Posts: 86

daluca 22 Jan 2006, 08:12

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.

22 Jan 2006, 08:12

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