SC509 is a Z80 PIO card designed for Z50Bus.
The module has the following features:
- Full Z80 mode 2 interrupt support (IEI/IEO daisy-chain)
- Tight address decoding
- Flexible address selection
- Two 8-bit I/O ports with handshaking
- Connector on rear edge for ribbon cable
- Connector on top edge suitable for Dupont cable