In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote: Try putting a "PAUSE 1" just after "\MOV RB,#1" and before the "Main:" label. See if that works. If it does, the problem is the age-old "Read-Modify-Write" issue. Bean. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=147202#m147218 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)