Toshiba HX-M251
This page was last modified 22:33, 21 December 2021 by Mars2000you. Based on work by Gdx and Rderooy.


The Toshiba HX-M251 is a standard expansion of 64kB RAM. Product name is "Toshiba RAM Cartridge 64KB".

This cartridge is useful mainly to upgrade an MSX1. Actually it is better to buy a Memory Mapper cartridge that initializes its pages itself at startup.

Brand Toshiba
Model HX-M251
Year 1984
Region Japan
Launch price ¥19.800
Package content


Toshiba HX-M251 packaging
Toshiba HX-M251
Toshiba HX-M251 back

Minimum System Requirements

  • MSX1 computer, one free slot cartridge