Hello all, I'm trying to use a 12C508 that has 5 I/O pins and 1 input only (GPO3) I'd like to use GPO3 as an input, but it is tied to the MCLR\ The data sheet says I can configure the MCLR\ to be tied internal to Vdd. When I use the MPLAB-SIM to toggle this line low it acts just as a reset and starts the program over. Am I missing something?? -Ralph rlandry@haywood.main.nc.us "If they call it Tourist Season why can't we shoot 'em?" ICQ# 19545315