John Pearson wrote: > How do they get away with this? > They have an RS232 line going into a digital I/O > port using just a couple of resistors. I have look at most/all pages, but can not see that the BasicX24 has *any* RS232 port at all. "Serial lines", yes. "COM ports", yes. "RS232", no. Where did you see the reference to "RS232" ? Jan-Erik. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads