ON 20050927@8:07:49 AM at page: http://www.piclist.com/techref/member/VN-yahoo-8/index.htm#38622.33875 bert botha[bj-hotmail-] Questions: Just struck me whats wrong! Are you using pull down resistors for scanning the 4rows?. If not then the 'open' TTL will float and be 'seen' as high, registering an input. The inputs are only pulled high by a keystroke. ON 20050927 at page: http://www.massmind.org/techref/member/VN-yahoo-8/index.htm someone[--] edited the page. Difference: "R:\bak\H\techref\member\VN-yahoo-8\index.htm.20050927.dif"