Original, non 2d upgraded units will regain full functionality in OS9, if flashed back to old firmware.
2d card equipped units will have only limited functionality in OS9.
2d card equipped units can not use old, OS9 compatible firmware.
Do you know if I can tell from a picture if a 2882 has the 2D upgrade install? Do the ADAT ports look different?
For those who might be interested in Metric Halo interfaces for OS9 - right now there are two 'legacy', OS9 compatible units on Reverb at very good prices.
One ULN-2 in Canada and one 2882 in UK.
If not the astronomic shipping prices to my location and taxes, I would have bought them both.
Don't miss out, those might be the last of the few untouched units remaining.
Disclaimer. I'm not connected in any way.