Depending on which CPU was on the other side ... pictures of the board which enabled him to reverse-engineer the circuit. The board used the similar D8202 DRAM controller and came with logic ...

I feel a bit guilty for placing the Raspberry Pi 2 series in the worst position on this list. It was a more powerful model than the original series, with the Raspberry Pi 2 Model ...

The total circuit is incredibly compact for a complete CPU, using just 33 chips. This includes 64 KB of flash to store programs as well as a 555 timer to generate a clock signal. I/Os are limited ...

Prior to integrated circuits, these electronic components were discrete devices soldered to each other on a printed circuit board ... a circuit found in every CPU no matter its size.