The Lab 4 exercises were written for a PIC16F1937 processor with a Seven Segment display attached; with the 7 segments (plus the decimal point) connected to PORTB data bits and the anode for each display connected to bits 0 to 3 of PORTA..

Matrix E-blocks users
The Lab 1 exercises require an EB008 7-Segment display board connected to Port A and Port B.
An example layout is shown opposite.