* [[AMRAM2]] ([[Silicon Systems]])
* [[Amstrad ROM Expander]] (DIY) (Practical Electronics/Simon Dean)
* [[Britannia ROM Board]] ([[BritanniaSoftware Ltd]])
* [[Cirkit HX-RX1 Rom Expansion Card]] ([[Cirkit]])
* [[CPC.Flash]] internal/external 4MB ROM upgrade ([[Yarek]])