RISC OS on the Raspberry Pi Zero - is it possible?

I have to comment. Sorry. I got RISC OS up and running on a Pi Zero with no previous RISC OS experience and no other Pi. You got as far as getting it to boot. Even using AnyMode the Pi Zero has a weird habit of doing odd things with the screen mode on reboot. I ended up addressing it by making a custom monitor definition based off specs I found online because my monitor wasn’t listed, and choosing it. Odd resolution issues disappeared!

Out of curiosity I installed RISC OS on my pi zero W.
It’s delightful to see how well it runs.
One thing though i have not yet figured out. The screen in 16 million colors shows BGR instead of RGB.
Is that to be expected or is it because i run the latest rom?

Impression Style with Aemulor.. This is really great!
I need to see how i install my copy of Artworks 1.7 :-)
Oh, and using an old USB network thingy I have internet but !NetSurf will crash easily in 256 color mode.

The screen in 16 million colors shows BGR instead of RGB.

Check that CONFIG/TXT (inside !Boot.Loader) contains the line:
framebuffer_swap=0

I’ve been mulling over this for a couple of days. The “framebuffer_swap” issue goes back to 2015, so any recent build (e.g. RISC OS Pi) would already have the fix applied.

It’s possible that AnyMode is the culprit, but I’ve not been able to get it to misbehave in exactly the way you describe.

For example, a full-screen application can end up with red and blue swapped and I can get Pinboard to crash by requesting a desktop mode with 16M colours and LTRGB, but the desktop colours resolutely stay the right way round.

Nevertheless it might be worth removing AnyMode to see if the colour swap goes away.

the desktop colours resolutely stay the right way round.

I’ve had reversed desktop colours on my system (Pi 3, OS 5.24, AnyMode loaded, wrong framebuffer_swap setting).