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||[[Firmware|CPC 464 Modified OS]]||19xx|| ? ||Commodore 64 replica ROMs||1||lower ROM|| [[Media:C64_replica_ROMs.zip|C64 replica ROMs]]
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||[[Firmware|CPC 464 OS Danish]]||1984||[[Amstrad|Amstrad]] - [[Locomotive_Software|Locomotive]]||||1||lower ROM|| [[Media:os464 (Danish).rom|Danish CPC 464 OS ROM]]
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||[[Firmware|CPC 464 OS French AZERTY]]||1984||[[Amstrad|Amstrad]] - [[Locomotive_Software|Locomotive]]||||1||lower ROM|| [[Media:os464 (French AZERTY).rom|French AZERTY CPC 464 OS ROM]]
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||[[Firmware|CPC 464 OS Spanish]]||1984||[[Amstrad|Amstrad]] - [[Locomotive_Software|Locomotive]]||||1||lower ROM|| [[Media:Os464_(Spanish).rom|Spanish CPC 464 OS ROM]]
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||[[Firmware|CPC 664 OS]]||1985||[[Amstrad|Amstrad]] - [[Locomotive_Software|Locomotive]]||||1||lower ROM|| [[Media:OS_664.zip|CPC 664 OS ROM]]