Yamaha SX-101
This page was last modified 15:02, 13 January 2022 by Mars2000you. Based on work by Rderooy and Gdx and others.


The Yamaha SX-101 Expansion box is an original slot expander designed to be placed underneath the monitor.

It is meant to be used with the Yamaha SX-100 computer, but can also be used with the rebranded Victor HC-30, both of which have only one specific 56-pin cartridge slot.

This slot expander

The specific Yamaha SX-100 / Victor HC-30 cartridge slot uses reserved pins for additional slot signals. If the SX-101 is used with another MSX computer, only one cartrige slot will be usable.

Launch price: ¥26,800


Yamaha SX-101
Yamaha SX-101 underside
Yamaha SX-101 detail with SFG module
Yamaha SX-101 front
Yamaha SX-101 back
Yamaha SX-101 with SFG module