In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote: [code] SZ ' if not 0, get more bits JMP ISR_Exit RX_Buffer: [/code]John, If the zero flag is set, then the "SZ" instruction is skip the "JMP ISR_Exit" instruction and you will be at the RX_Buffer: label. Bean. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=131371#m131380 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)