|'''Lower ROMs'''|||||||||||||
|-
||[[Firmware|CPC 464 OS]]||1984||[[Amstrad|Amstrad]] - [[Locomotive_Software|Locomotive]]||||1|| N/A lower ROM|| [[Media:OS_464.zip|CPC 464 OS ROM]]
|-
||[[Firmware|CPC 464 Modified OS]]||19xx|| ? ||||1|| N/A lower ROM|| Link Required
|-
||[[Firmware|CPC 664 OS]]||1985||[[Amstrad|Amstrad]] - [[Locomotive_Software|Locomotive]]||||1|| N/Alower ROM|| [[Media:OS_664.zip|CPC 664 OS ROM]]
|-
||[[Firmware|CPC 464+ and 6128+ OS]]||1990||[[Amstrad|Amstrad]] - [[Locomotive_Software|Locomotive]]||Dumped from 6128 [[Plus System Cartridge]]||||N/ACart|| [[Media:OS_6128_PLUS.zip|CPC 6128+ OS ROM]]
|-
||CPC 464+ Plus A2||1990||[[Amstrad|Amstrad]] - [[Locomotive_Software|Locomotive]]||||||N/ACart|| [[media:CPC464PlusA2.zip|CPC464+ A2 ROM]]
|-
||[[Firmware|CPC 6128 OS English]]||1985||[[Amstrad|Amstrad]] - [[Locomotive_Software|Locomotive]]||||1||N/Alower ROM|| [[Media:OS_6128.zip|CPC 6128 OS English ROM]]
|-
||[[Firmware|CPC 6128 OS French]]||1985||[[Amstrad|Amstrad]] - [[Locomotive_Software|Locomotive]]||||1||N/Alower ROM|| Link Required
|-
||[[Firmware|CPC 6128 OS Spanish]]||1985||[[Amstrad|Amstrad]] - [[Locomotive_Software|Locomotive]]||||1||N/Alower ROM|| Link Required
|-
||[[CPC FutureOS lower ROM|CPC FutureOS lower ROM]]||2012||[[FutureSoft|FutureSoft]]||Lower-ROM replacement||1||lower ROM|| [[CPC FutureOS lower ROM]]