After thirty odd years I still have these numbers encoded into and handful of neurons somewhere.

Thank you for getting me to dig them out and great that they live on in libvirt!

ps The memory mapping reminded me that ZX81 managed to squeeze a 32 x 24 screen into a 1k total RAM. I think someone managed to write a chess program with those restrictions - but only using 8 x 8 or so of the screen.