Z80 first Wire wrap build

This was after some initial breadboard testing went on to build a wire wrapped board.

Features: Z80 running 4 Mhz, two 8K Memory sockets with one able to select RAM or EPROM use, Z80 PIO

Schematic of board.

Header at other end gives access to the Z-80 PIO ports, made a breakout board to test out writing to the ports. Similar to my last program driving an LED Display but this time with the Z-80 PIO. With using the Z-80 PIO now can use interrupts feature for when an event happens at one of the ports. The Z-80 PIO has two interrupt vectors, one for port A and one for port B, in which you can have port point to the code to run on an event vs having to poll the port over and over to look for an event to happen.