Need bootable NVME support for ASRock Q1900-ITX MB BIOS. It will be used with GNU/Linux OS, and the NVME will be attached to PCIe slot with M.2 adapter.
Here is link to the BIOS: https://download.asrock.com/BIOS/CPU/Q1900-ITX(2.00)ROM.zip
And here is the guide to follow: [HowTo] Get full NVMe Support for all Systems with an AMI UEFI BIOS - Special Topics / NVMe Support for old Systems - Win-Raid Forum (level1techs.com)
Give it a try, good luck.