4-8 GB space

Of course, one day RISC OS will support the extra memory space present on some motherboards. But for now, we’re still waiting.

Is there a way to read/write the space behond the 4GB barrier on the Pi4? I see some immediate uses for that:
- A “do what you wan’t” library to read/write in this space.
- A massive RAM disc (4GB!).
- A new kind of dynamic areas (only accessible with dedicated SWIs or via a specific memory window below the 4GB limit).
- Some space reserved to launch tasks on other cores.