Neos RM-48
This page was last modified 20:22, 17 January 2021 by Mars2000you. Based on work by Gdx and Rderooy.


The cartridge RM-48 is an expansion of 48kB RAM made and sold by Neos.

Its RAM is placed on pages 0 to 2 (0000h~BFFFh). As such it is only useful to upgrade a 16kB MSX to 64kB. However the systems base memory and the expansion will be in different slots which can cause compatibility problems with some software that blindly assumes all memory to be in a single slot.

If you are looking for a memory expansion we recommend to buy another standard expansion. A 64kB RAM expansion, or even better a Memory Mapper cartridge that initializes its segments itself at start up is the best choice.

Official price: ¥12,800



Minimum System Requirements

  • MSX1 computer with 16kB RAM, one free slot cartridge