Sony HBM-16
This page was last modified 02:29, 18 January 2021 by Mars2000you. Based on work by Gdx and Rderooy.


The cartridge HBM-16 is an expansion of 16kB RAM made and sold by Sony in 1984.

Its RAM is placed on page 2 (8000h~BFFFh). As such it is only useful to upgrade a 16kB MSX to 32kB. 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.

Brand Sony
Type HBM-16
Year 1984
Region Japan, Europe
Official price JP: ¥8.000
Package content


Sony HBM-16 box
Sony HBM-16 cartridge
Sony HBM-16 cartridge

Minimum System Requirements

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