Zilog Z80 microprocessor chip test circuit

Update: check out my new Z80 video; I made the simplest Z80 computer, and demonstrating its operation: https://www.youtube.com/watch?v=CS44XJt_gYc Minimal test circuit for a Z80 microprocessor chip. The data lines are pulled to ground to emulate reading a string of NOPs from memory, and the clock is pulsed manually to single step fetching and executing the NOPs. LEDs are placed in the low nibble of the address bus, as well as the RD (read), and MREQ (memory request) pins to visualize which memory addresses are being read while fetching instructions.

The second chip on the breadboard is just a 74hc14, a schmitt triger inverter, used to send a clean clock signal to the Z80. ... https://www.youtube.com/watch?v=V2hQi7v_bTw