This prototyping board is designed to allow both narrow and wide dual-in-line ICs and also 0.1" pitch connectors on the back (right) edge of the module.
The documentation can be found at www.smallcomputercentral.com
This module conforms fully to the RCBus specification v1.0 for 40-pin systems.
The RCBus specification includes RCBus-2014 (both RC2014 standard 40-pin bus and RC2014 enhanced 60-pin bus) and also the full 80-pin RCBus. The 80-pin RCBus provides support for advanced Z80 features, such as the interrupt daisy-chain, as well as support for other processor families.
The full kit includes all the components needed to make the module, as shown in the first picture. You will require tools, solder, and cleaning materials to assemble this kit.
If you are looking for a complete system the following products might be appropriate.
The printed circuit board is available on its own here.
Documentation (smallcomputercentral.com)
Products usually ship within 3 days