The VMU (short for Visual Memory Unit, not Virtual Memory Unit) is the " memory card" for the Sega Dreamcast. While its most basic function is as a removable storage device, the VMU has other purposes as well. It can serve as an auxiliary display during normal gameplay and, through the use of additional software, it can act as a console independent of the Dreamcast.
Technical Specifications
CPU: 8-bit
Memory: 128 KB (200 blocks)
Display: 48 dot Width x 32 dot Height, Monochrome
Display size: 37 mm (1.46 inches) Width x 26 mm (1.02 inches) Height
Case dimensions: 47 mm (1.85 inches) Width x 80 mm (3.15 inches) Height x 16 *mm (0.63 inches) Depth
Power source: 2 x button batteries with auto-off function
