Dorptrum / MC6821 PIA Card
PIA card using the MC6821.
This is a PIA card based on the MC6821 PIA. It is a very simple card with only one component. At the top of the card there is a header where a device (e.g. keyboard) can be attached. This is the first card which exclusively uses 30 AWG wire wrapping wire. The PIA is mapped to I/O addresses $0C-$0F.