Yamaha UDC01

Data memory

Yamaha UDC-01 cartridge data memory

1985 (Apr.)
Initially sold for ¥9,800

The Yamaha UDC01 is a static RAM cartridge that can hold data from various other Yamaha programs, such as YRM103, YRM105, YRM301, YRM302, YRM303, YRM304, YRM305, YRM506. A battery inside the cartridge keeps the 4KB memory alive. It's effectively identical to the Sony HBI55.

Note that on MSX computers with a single cartridge slot it can't be used together with another cartridge unless connected to the back expansion port with an adapter such as the Yamaha CA01.

Yamaha UDC01 box
Yamaha UDC01 box