Monitor ports on Raspberry Pi4 and RISC OS

I understand only a single HDMI port can be used in the Raspberry Pi4 under RISC OS. With both ports active I could connect 2 monitors, one for personal viewing and the other for a large screen monitor (provided by my library). At the moment I use a splitter but it would be nice to reduce the amount of hardware I need to take when giving a talk. Although low priority what’s the likelihood of this being implemented?

Meanwhile could try booting into Linux and running RISC OS from RPCEmu to get the two monitor support.

That may be possible – I’ve never looked at that way of doing it – does complicate matters but may be worth pursuing. I use ArtWorks files in OHP (V2.62) which “may cause” additional problems on RPCEmu.

Do you just want identical output on two monitors? I’ve not looked into it, but it seems reasonable that it might be possible to point both ports to the same frame buffer. Failing that, regularly copying the screen to another screen buffer might be possible, or modifying a VNC server to do so might be more efficient?