"David E. Queen" wrote: > I plan on usering both the timer1 and portB interrupt on change in a 16C65 and > I ado not see the info that tells me how to handle multiple interrupts, > could someone point me the right .pdf file and section? There is only one interrupt; you have to test inside the interrupt routine what bits are set to determine the interrupt source, and branch to appropriate code. Clyde -- Clyde Smith-Stubbs | HI-TECH Software, | Voice: +61 7 3300 5011 clyde@hitech.com.au | P.O. Box 103, Alderley, | Fax: +61 7 3300 5246 http://www.hitech.com.au | QLD, 4051, AUSTRALIA. | BBS: +61 7 3300 5235 ---------------------------------------------------------------------------- For info on the World's best C cross compilers for embedded systems, point your WWW browser at http://www.hitech.com.au, or email info@hitech.com.au