Hello all - I have downloaded the simulator / MPLAB and have been trashing my way through it over the past few days. I would like to simulate the software for a "keystroke on port b<7:4> waking the processor and then executing some code" Can this be done with the simulator? I have the code written and it seems to flow properly up to the point of executing the "sleep" instruction (the general interrupt enable is active so I should get a vector to 0004 when the pin is brought low on port b) I went into the async. stimulus and configured one of the simuli for port b7 and low when activated. When I try it out it doesn't seem to do diddly - i.e. the processor does not vector to 0004 - where I have a breakpoint set shortly thereafter... Perhaps I am missing something simple here - it could be as I have only been working with the MPLAB system for a very short time. I've set up the high nibble on port B as an input, and when I see the value in the "window" for viewing registers, it's all 0s - I have the pull ups enabled as well... Thanks for any help people can provide Lewis cobb@zeus.ee.unb.ca