3mdeb Achieves Critical Milestone in Open-Source Firmware for AMD Ryzen AM5 Motherboards

Open-source firmware developers at 3mdeb have announced a significant breakthrough in their efforts to bring Coreboot and AMD openSIL to consumer motherboards. The consulting firm successfully booted the MSI PRO B850-P WiFi board using a custom open-source firmware stack based on AMD's openSIL and Coreboot. This milestone marks a crucial step toward making fully open firmware available for AMD's Ryzen AM5 platform.

The achievement, detailed in a recent blog post, demonstrates that the combination of openSIL and Coreboot can initialize the motherboard hardware and reach the boot stage. While the firmware is not yet ready for end users, the progress proves the feasibility of open firmware for modern AMD consumer systems. “We've reached a point where the board initializes and we can see the first output,” said Maciej Pijanowski, 3mdeb's project lead. “This is a huge validation of our approach.”

Concurrently, 3mdeb is also working on a similar open-source firmware port for a Gigabyte EPYC server motherboard. Both projects aim to provide a complete, auditable, and customizable firmware alternative for AMD platforms, moving away from the proprietary AMI and Insyde BIOS that dominate the market. The EPYC project is in a more advanced stage, but the Ryzen achievement brings consumer-grade open firmware one big step closer.

Background

AMD openSIL is an open-source silicon initialization library developed by AMD to replace its proprietary AGESA firmware. Coreboot is a widely used open-source firmware that can replace proprietary BIOS/UEFI. Together, they form a completely open firmware stack, eliminating binary blobs and enabling user control over motherboard initialization. This combination has been available for server platforms, but bringing it to consumer Ryzen AM5 boards has been a long-standing challenge due to hardware and documentation barriers.

3mdeb, a Warsaw-based firmware consulting company, has been at the forefront of this effort. The MSI PRO B850-P WiFi is a popular mid-range AM5 motherboard, and its partial boot with openSIL+Coreboot indicates that the firmware can handle modern DDR5 memory, PCI Express, and AMD's AM5 socket. The current milestone follows months of work on initializing the CPU, memory, and chipset.

Key Details and Next Steps

The latest boot is still far from a fully functional system. The firmware currently hangs after initializing the early hardware, but it successfully passes the CPU and memory initialization stages. 3mdeb is now focusing on enabling further boot stages, including graphics output and storage controller support. The team has also published a detailed breakdown of the boot process and the obstacles remaining.

“We encourage the community to look at our code and contribute,” Pijanowski added. “Every pointer and patch helps us move faster.” The source code is available on 3mdeb's GitHub repository. For the server EPYC board, the project is already booting to a Linux shell, representing a more mature stage.

What This Means

If successful, this initiative would give users unprecedented control over AMD Ryzen AM5 systems. Open firmware allows for faster boot times, better security auditing, custom memory timings, and even the removal of vulnerable proprietary code. It could also extend motherboard longevity by enabling community-driven bug fixes and features.

For enterprise and homelab users, open firmware reduces vendor lock-in and allows deeper hardware integration with custom operating systems. The success on AM5 would also pressure motherboard vendors to open up their hardware initialization process, potentially transforming the consumer PC firmware landscape. “This is not just about one motherboard,” said Pijanowski. “It's about proving that open firmware for modern AMD systems is possible and practical.”

3mdeb plans to release a limited early-access version of the firmware for the MSI PRO B850-P in the coming months. Interested developers can follow the project on the 3mdeb blog and contribute via the open-source community repositories.