Sony HBI-300
This page was last modified 15:06, 26 September 2021 by Mars2000you. Based on work by Gdx and Rderooy.


The Sony HBI-300 is a full duplex 300bps modem cartridge released by Sony in 1986.

It includes a ROM with MSX-Modem BASIC.

Brand Sony
Model HBI-300
Year 1986
Region Japan
Launch price ¥24,800
Package content
Emulation ROM dump needed. See this thread for details


Sony HBI-300
Sony HBI-300 cable
Sony HBI-300 cartridge (back)
Sony HBI-300 cartridge and manual
Sony HBI-300 manual