[Seeking BIOS / SPI Dump] CW-N300-NET Rev 1.2 — System Unstable / Crashing under OPNsense

CW-N300-NETK26010109 V1.2 - Looking for latest BIOS (Version 9 / AMI 2.22.1293) Device Model

• Model: CW-N300-NETK26010109
• Revision: V1.2
• CPU: Intel Core i3-N300
• SPI Flash: FM25W128 (16MB)

Attached:

• Overall board view
• Model / revision marking
• PCIe SFP+ expansion card

Physical Ports

• 4 × Intel I226-V 2.5GbE
• 2 × SFP+ (PCIe expansion card)
• HDMI
• USB ports
• RJ45 console port
• mSATA slot

Issue Description

After a BIOS update:

• OPNsense still booted initially
• Network interfaces stopped initializing correctly
• After a reboot there was no video output anymore
• The board eventually became unbootable

Recovery

I recovered the board by directly programming the SPI flash and using the BIOS image from:

https://drive.x86pi.com/BIOS/3.Gateway-BIOS/N100-N200-N305-4L

The board now boots again.

Current Status

• POST beep is present
• OPNsense boots successfully
• Serial console works
• PCIe SFP+ card is detected again
• Intel I226-V interfaces are detected
• No HDMI video output
• System is unstable and not suitable for production use

Environment

• OPNsense 26.1.x
• FreeBSD 14.x

Looking For

I found a forum post mentioning the following BIOS:

• CW-ADLN-NET
• Version 9
• AMI BIOS 2.22.1293
• Build Date: 2025-08-12

Could someone please provide:

1. The latest BIOS or Full SPI ROM image for CW-N300-NETK26010109 V1.2
2. A download link for Version 9 (AMI BIOS 2.22.1293)
3. Confirmation that this BIOS supports the PCIe SFP+ expansion card
4. The recommended BIOS version for hardware revision V1.2

Thank you very much for any help.