An 8-Bit PC that I built in Factorio is displaying the Fibonacci Numbers. After the number exceeds 255, the system overflows and starts showing the 8 least significant bits of the Fibonacci numbers (MOD[256]).
I also display the maximum possible speed by increasing game speed.
Signal Color Legend;
Green: Output Mode
Cyan: Load Mode
Yellow: Sleep Mode
The design is directly implemented from Ben Eater's actual breadboard PC. You can see it here;
• Building an 8-bit breadboard computer!