This page was last modified 11:19, 17 January 2020 by Gdx. Based on work by Mars2000you and Tvalenca and others.


The standard sound chip in the MSX is called the PSG (Programmable Sound Generator). It can play either a tone or noise on each of its three voices. It also controls the Joystick ports and a few other things.

Like other parts of the MSX specification, the PSG chip was an off-the-shelf part. In this case the General Instrument AY-3-8910, which can also be found in many other systems of the era. This chip, or one of its clones, can be found in many MSX1 systems. In newer MSX systems, the PSG is often integrated in a chip called the MSX-Engine (or MSX-System).

List of fully compatible clones:

  • File KC89C72 (used in an Arabic MSX)
  • JFC 95101 (not used in MSXs)
  • Microchip Technology AY-3-8910A (not really a clone because Microchip Technology is the old semiconductor division of General Instrument)
  • OKI M5255 (rare, ? not used in MSXs)
  • OY-2-8910AC (used in an Arabic MSX)
  • Toshiba T7766A (official clone used in MSXs -sometimes as a separated chip or often embedded on MSX Engine)
  • WB5300 (rare, not used in MSXs)
  • Winbond WF19054 (rarely used in MSXs)
  • Yamaha YM2149 (official clone often used in MSXs -either as a separated chip or embedded on MSX Engine)

Note: The Yamaha YM2149 is called SSG (Software-controlled Sound Generator).

Software that uses the PSG for BGM and/or SFX.

External links