Software simulations allow you to understand how a CPU functions. These tools support both the classic 8-bit architectures as well as more complex modern chips. But these are only software representations. Would it not be more fun to debug and operate the inter-workings of a CPU using LED indicators? With the MK1 8Bit Computer from Federico Scozzafava, you can see what is happening inside of a CPU.
![](https://hackster.imgix.net/uploads/attachments/1098390/8bit-computer_v1-16x9_p3pqzmXALF.jpg?auto=compress%2Cformat&w=830&h=466.875&fit=min&dpr=1)