> I have a Radeon FireMV 2250 (PCIex1) that I use for Linux on my X5000.
> Is that supported in MorphOS?

Support for the card has been inofficially added last year, and now officially with MorphOS 3.18:

"Added more FireMV cards from the supported Radeon family pool, namely FireMV 2200 (devid 0x5b65), FireMV 2250 (0x719b) and FireMV 2260 (0x95cf)"
https://www.morphos-team.net/releasenotes/3.18

> As far as I can see from tha compability list is this specific model is not

The newly supported FireMV cards have not been added to the list, while other 3.18-specific changes have been made to the page.