In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote: No, you need to do this: [code]INTERRUPT ' ISR code here RETURNINT 255[/code] You'll also have to set the option register -- this is covered in the help file. Q: Why bother using the RTCC input in this manner when you could easily use an edge-triggered interrupt on port B? ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=206380#m206459 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)