This 6510 CPU NOP tester will provide you with a way of quickly testing for a functional CPU. While it doesn’t provide in-depth testing of the CPU it does offer a simple way to test for basic functionality.
With the potentiometer, you can adjust the clock slightly.
The 6510 NOP tester is part of a series of NOP testers developed by Stephan at 8bit-museum.de. I am selling these here with his permission where a portion of the proceeds will go to him. More information such as documentation and gerber files can be found here.