[A lot of code deleted] One problem is that you are using the find_pixel rutine without chaning the rom page to page 4. Another thing is that the start of the rpogram seems to be missing (I could not see the title string). Besides that is seems like you have some unneded code too (I did not see any call to the abs rutine). It would be easier to find the exat problem if you wrote what happend when you ran the program. Dines Justesen