Dreamcast memory cards (VMU - Visual Memory Unit) [1] were mini handheld gaming consoles with an 8-bit Sanyo LC8670 CPU and a monochrome screen. Some Dreamcast

Dreamcast memory cards (VMU - Visual Memory Unit) [1] were mini handheld gaming consoles with an 8-bit Sanyo LC8670 CPU and a monochrome screen. Some Dreamcast games let you "download" mini games into the memory card and play them independent of the main console. [1] https://en.wikipedia.org/wiki/VMU https://en.wikipedia.org/wiki/VMU