Implementation of the 6502 CPU written purely in C++.
The code tries to explain tricky parts of the implementation.
There is a bus that has only 2 devices: CPU and RAM (8KB). The emulation is almost complete.
There is an amazing website that explains every part of the 6502 emulating process, some of the links are directly inserted into the code.
The number of FPS on the screenshot accurately explains the development process of emulators