Hello All, This is a beginners question. I'm trying to program serial ( RS232) communication on a Microchip 16F84 ( 10 MHz ). I'm using PBasic and using the SERIN & SEROUT commands. I was wondering if the PBasic SERIN & SEROUT Commands assume that the PIC is running at 4MHz and that is why I'm having trouble receiving the correct data from the PIC. thanks, Marko Palikko marko@comtecheservices.com