>> As is expected, see comment #34.

> Yes and no, I was kind of expecting the X800Pro/G5 to work.

As I wrote in comment #34, only X1950/G5 combination works. X800Pro/G5 combination doesn't work because the feature relies on AtomBIOS, which is built into Radeon R500 and up*. X800 is R400-based.

https://morph.zone/modules/newbb_plus/viewtopic.php?forum=11&topic_id=9888&start=38

> The powermac may display OF if the card ever had an apple version

OpenFirmware display requires actual PPC ROM (be it genuine or flashed) present in the actual graphics card.

> MOS might display something if Mac boot doesn’t (non-reflashed cards)

Yes, with R500-based AGP graphics card on G5.

> but it really depends on your card’s exact ID

It depends primarily on the presence of AtomBIOS*.


Edit: * While early AtomBIOS versions came already somewhen during R400 series, the MorphOS AtomBIOS parser seems to require the newer AtomBIOS versions that started with the R500 series.

[ Edited by Andreas_Wolf 19.01.2021 - 00:54 ]