The card itself contains a CPU UA880D which is a clone of the Z80 CPU operating at up to 4MHz. Furthermore, an oscillator with a frequency divider with the possibility of adjustment with a jumper. And a reset circuit.

Unfortunately, I didn't avoid using wire jumpers, which also have to be this long due to an error in the design (I didn't make holes for them). In addition, I chose the wrong spacing of the CPU socket, so I also made a reduction.