Hi all,
I would like to help any regrading the PIC related questions. I live in USA and I am the Microchip authorized design partner for Sri Lanka.
I see you are looking to learn the 16F84 which is obsoleted products form Microchip and try to learn 16F628 which is the same and more function available for development,
We can start with 16F628
Ashan Abeysekara
USA