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By Zayden R., August 5, 2026
3mdeb has released the first open-source firmware for AMD Ryzen AM5, utilizing AMD openSIL and Coreboot. This development allows support for Phoenix Ryzen 8000 processors, making it significant for developers and system integrators.
3mdeb, a firmware consulting firm, has made a noteworthy contribution to the open-source community by releasing the first open-source firmware for a modern AMD Ryzen AM5 platform. This release leverages AMD openSIL and Coreboot, specifically tailored to an MSI desktop ATX motherboard. The significance of this development lies in its potential to broaden support for AMD’s Phoenix Ryzen 8000 series processors, offering developers and system integrators greater flexibility and control.
The engineering team, led by Michał Żygowski, has been meticulous in ensuring that the necessary changes for AM5 support are integrated into the upstream AMD openSIL and Coreboot repositories. The pull request includes updates for handling Phoenix desktop CPUs, enhancements in MMIO handling, and support for the Promontory21 IP block, which is crucial for chipset initialization. Additionally, missing elements such as SMU, USB, and GFX initialization have been addressed, ensuring a more comprehensive firmware solution.
In practical terms, this means that engineers can now boot both Ubuntu 26.04 and Windows 11 on an AM5 Phoenix platform using Coreboot. This is a solid improvement, as it opens up new possibilities for those looking to use open-source firmware in their systems. The work has primarily focused on the MSI PRO B850-P WIFI motherboard, and 3mdeb's Dasharo firmware release offers a user-friendly experience for those interested.
This release is not just about bringing open-source firmware to the latest AMD platforms; it's about enhancing the functionality and reliability of these systems. With the upstreaming process underway, broader community contributions and improvements are anticipated, further enriching the open-source ecosystem.
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