The Amstrad CSD was a machine that was in-store to demonstrate the hardware of the Amstrad plus.
It had a system cartridge which contained a menu, and could hold a furthur further 12 cartridges.
It has additional hardware to allow switching of cartridges.
It is believed the others are for a rolling demonstration mode, and a play mode that is limited.
The only cartridge to have this header is [[Pang (cartridge)|Pang]].
== Pictures ==