Introduction - If you have any usage issues, please Google them yourself
SIMPLE 8X8 LED MATRIX SCROLLING EXAMPLE
16F872 External 4MHz Xtal Osc
LED Matrix columns are conected to PORTC via ULN2004AN to 0v.
RC0 - 1st column on left of display
LED Matrix rows conected to PORTB via 100 ohm resistors (Resistor value dependant on LEDs used)
RB0 - top row
MCLR (pin1) connected via 4K7 to +5v supply.