NCST BBC Input/Output Adaptor

Parallel and User Port breakout interface

A parallel and user port breakout board allows you to access the data pins of both the parallel and user ports more easily for interfacing projects. 

BBC Micro Parallel and User port breakout board

This particular board requires both the parallel and user port connectors to be connected simultaneously as the green output connectors are from the parallel port however the LED indicators that indicate the status of each pin on the parallel port outputs are grounded to