Hi all, Wonder if some one can help me. I'm using MPLAB-SIM to test some code that I'm writing for a 16C84. As far as it goes it seems to be working but I cant get the SIM to give me a manual input on a couple of pins. Ive gone through Windows>Modify and used the popup with success for changing the value of several reg's in the program as they needed changing, but just cant get it to set an input high. The input I'm looking for is porta bit 2, going high. Ive tried porta - and trisa, writing a variety of values to them without success. Any help on this would be appreciated. -- Philip Martin email philip@philmart.demon.co.uk Royal Quays, North Shields