* Project Number 18 - Amstrad Expansion System Part 1: an external ROM card system for the Amstrad (see [[Maplin ROM Box]])
* Project Number 19 - Amstrad Expansion System Part 2: describes the 6 x 8-bit parallel I/O Port and PSU Card(see [[Maplin ROM Box]], too.)* Project Number 20 - [[Maplins 8bit Input Port|Amstrad 8 Bit Input Port]]
Additionally, some "general purpose" projects can be customized for use with the CPC (and do include info on how to do that) (for example, the [[Maplins Weather Satellite Receiver]] includes CPC source code).