Hi, You can use asynchronous, pin and clock stimulus, from "Debug/Simulator Stimulus" option on main menu. Adrian At 11:36 1996-05-28 -0700, Daniel Holt wrote: > >How do you change the pin values in MPLAB durring a simulation. I am trying >to simulate a matrix keypad which externally holds port B pins high. Of >course the simulator doesn't know this (without a stimulation file). I have >tried the 'modify' window with no luck. I can only change general purpose >registers, but not the ports. > >Another gripe.... The help files where not included in my download. Is >this normal? Thanks for any help. >--- >Daniel Holt >