/EPSM

NES Expansion Port Sound Generator

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EPSM

NES Expansion Port Sound Module (Earlier: Expansion Port Sound Generator)

An expansion sound card for the Nintendo Entertainment System

EPSM RevA

It uses an Yamaha YMF288 Soundchip that gives a lot of new audio capabilities to the NES.

Features of YMF288:

  • 3 Pulse Channels with Envelope and Noise
  • 6 4OP FM Channels with hard panning stereo.
  • 6 Rythm channels featuring 6 different ADPCM Drum Recordings with Hard Panning Stereo support
  • 2 Timed IRQ's

Added features of the EPSM

  • Forwards expansion audio from supported gamecarts
    • Original Famicom expansion audio games with compatible adapter
    • PowerPak
    • EverDrive N8
    • EverDrive N8 Pro
    • Other carts using EXP2, EXP6 or EXP9 to output audio
  • Alternative 3.5mm jack for Stereo output
    • EPSM Audio forwarding to the NES RCA/RF outputs are disabled when the 3.5mm jack is plugged in
    • NES Audio and Cart Expansion audio plays as Dual Mono on the 3.5mm jack.

Tools

  • Mesen-X: Supports playback of EPSM using any mapper.
  • FamiStudio: Allows for music creation for the EPSM and has both ROM and NSF export options.

Famistudio_and_Mesen

Usage