====== 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.

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{{qlwiki:ql_bus_buffer_card.jpg?direct&240|QL Bus Buffer Card}}
{{qlwiki:expansion_development_kit_orthogonal.jpg?direct&240|Main Expansion Development Board}}

(Images above reproduced with kind permission of the [[http://www.computinghistory.org.uk/|Centre for Computing History]])

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