||[[Firmware 3.1|Firmware 3.1]]||2012-2014||[[TotO|TotO]] and [[SyX|SyX]]||Lower replacement + expansion with ROM Flash & RAM Drive RSXs||1||lower ROM|| [[Media:FW315.zip|Firmware 3.15 ROMs]]
|-
||[https://github.com/llopis/amstrad-diagnostics Amstrad Diagnostics v1.4L]||2021-2024||[[llopis|llopis]]||Lower Rom Diagnostics ROM||1||lower ROM||[[Media:AmstradDiag1.4L.zip|AmstradDiag1.4L.zip]]
|}
||[[Desktop_Environment_System|DES - Desktop Environment System]]||1994||Michael Beckett - [[Campursoft|Campursoft]]||||2||1-15(31)||[[media:desr.zip|DES Desktop Environment System ROMs]]
|-
||[[FutureOS|FutureOS]]||1989- 20232024||[[FutureSoft|FutureSoft]]||Advanced OS for CPC6128 and 6128Plus||4(5)||ROM A: 0-15(31) / B-D(M): 1-255||[http://futureos.cpc-live.com/files/FutureOS_System_.8.zip FutureOS]
|-
||[[FutureOS|FutureOS XROM for M4]]||2022- 2023||[[FutureSoft|FutureSoft]]||Mass storage support for M4||1||1-255||[http://www.FutureOS.de FutureOS]
! File
|-
||[https://github.com/llopis/amstrad-diagnostics Amstrad Diagnostics v1.4L]||2021-2024||[[llopis|llopis]]||Upper Rom Diagnostics ROM||1||upper ROM||[[Media:AmstradDiag1.4L.zip|AmstradDiag1.4L.zip]]
|-
||[[Amstrad Toolkit|Amstrad Toolkit v1.1]]||1985||[[Beebugsoft|Bee Bug Soft]]||||1||-|| [[media:TOOLK11.ROM|Amstrad Toolkit 1.1 ROM]]