Oh, BTW, I'm curious, if you get the Sonnet extension to load before the BeOS bootloader, can you start BeOS with an L2 G3 upgrade? I've never put BeOS on my 6500 to try.
yeah, feel free to share. It .. misbehaved when I ran it after the sonnet extension, but I don't know if that's the G3 or something else. Didn't get any video, but it did make a noise, which suggests it booted. More fiddling needed.
fiddling was successful: running the BeOS loader after the Sonnet G3 gubbins had loaded apparently made it work with the G3. Worth knowing. Forgive phone photo
I had to change the file type of the bootloader to get the Sonnet extension to load first, but can confirm that I only get a grey screen with the 800MHz G4.