Sinclair QL Expansion Development Kit

This was an internal development kit used by Sinclair to test expansion cards. The smaller card plugs into the QL and mirrors the bus signals onto the backplane via the rainbow ribbon cable. This allows the user to add multiple expansion cards for testing. The backplane has a small daughterboard to allow an external power supply to be connected.

(Images above reproduced with kind permission of the Centre for Computing History)

Title: Sinclair QL Expansion Development Kit
Interface Type: Bus Expander
Connection: QL Expansion Port
Through-Connector: Yes
Manufacturer: Sinclair Research Ltd
Year First Sold: Never
Original Price: Unknown
Reviews: Unknown
Download Manual: Unknown
Accompanying Software: None