In SX Microcontrollers, SX/B Compiler and SX-Key Tool, robotworkshop wrote: Thanks for the extra details. I suppose I should start reviewing the assembly code a bit after compiling the original program with SX/B. For the moment I may just use a flag that the ISR routine can check right upon entry to see if it is suppose to be active. After a slight delay in the main body of the program I can just toggle on that flag so that the ISR routine can just fall through and run normally. Only a few more issues to shake out and another old robot will be working again... Best Regards, Robert ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=234188#m234503 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)