I am a beginner with PIC programming. I have decided to use the 16F628 but all projects I have are for the 'F84. Where do I find information about code conversion?"
The F628 is very close to the F84. Basically, if you disable the comparators:
movlw 0x07
movwf CMCON
;and then change the CONFIG and chip type in the file: LIST p=16F628
include "P16F628.inc"
__config 0x????
;You should be OK.