Hi Emmett,
Have you gotten a hold of a datasheet for the 16F877? If not go to www.microchip.com and enter PIC16F877 in the search box and download the .pdf manual on the chip. In there you will get a complete breakdown of the insides of the 877as well as a few other close members of the family. They also have a family manual you should also look at. Everything you need to know about PICs is in the manual. Also look into the PBP manual about ports and pins.
Have anice day!
BobK
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