* [[Amstrad ROM Expander]] (DIY) (Practical Electronics/Simon Dean)
* [[Britannia ROM Board]] ([[Britannia Software Ltd]])
* [[Cirkit HX-RX1 Rom Expansion Card]] ([[Cirkit]]) (what is this?) (added 3 September 2006 by Torn) (also listed on [[Hwlist from retroisle]])
* [[CPC.Flash]] internal/external 4MB ROM upgrade ([[Yarek]])
* [[CPC GX4000-Multi EPROM Cartridge]] Use a GX cartidge for modified ROM software