OPNB MegaMod - NeoGeo YM2610 Hardware VGM Player
OPNB MegaMod - NeoGeo YM2610 Hardware VGM Player
Demo Videos
What is it?
The OPNB MegaMod is the world's first independent YM2610(B) hardware VGM player, capable of playing all NeoGeo game music. It includes an SDRAM controller and supports 8/16 MB sample ROM — delivering the full, authentic OPNB sound experience without any emulation compromise.
OPNB MegaMod is a standard MegaGRRL music module that can be used with an unofficial upgrade package without any hardware modification.
About the YM2610 Chip
The YM2610 (OPNB — FM Operator Type-N B) is one of Yamaha's most expressive FM synthesis chips, combining 4 channels of 4-operator FM synthesis, 3 SSG channels, and crucially, multiple ADPCM PCM channels with a massive 16 MB addressing space for sample ROM. This makes its sonic expressiveness far exceed that of similar Yamaha FM chips.
The YM2610 was the heart of the SNK NeoGeo arcade and home console, powering legendary soundtracks from Metal Slug, King of Fighters, Samurai Shodown, and hundreds of other classic titles. The YM2610B variant extends FM channel count to 6.
What Makes It Special?
The YM2610/B's 16 MB addressing space and complex address/data bus multiplexing make its sampling memory control circuit extremely challenging to implement. OPNB MegaMod solves this elegantly using an Altera Max3000 CPLD as an SDRAM controller to emulate the YM2610 sampling ROM — enabling playback of all NeoGeo game music and select Taito arcade music.
- World's first independent YM2610(B) hardware VGM player
- Standalone operation: No computer or host required — just power and headphones
- Full NeoGeo music support: All NeoGeo VGM files playable with authentic hardware sound
- Taito arcade support: Compatible with select Taito arcade music (YM2610-based titles)
- SDRAM controller: Altera Max3000 CPLD emulates 8/16 MB sample ROM
- MegaGRRL compatible: Standard MegaGRRL module format, works with unofficial upgrade package
- No hardware modification required
Key Specifications
- Chip: YM2610 / YM2610B (OPNB)
- FM channels: 4 (YM2610) / 6 (YM2610B)
- SSG channels: 3
- ADPCM: Multiple PCM channels with 8/16 MB sample ROM support
- SDRAM controller: Altera Max3000 CPLD
- Format: VGM playback
- Operation: Standalone (no PC required)
- Module format: Standard MegaGRRL
Options
- With MegaGRRL Desktop — $299 (complete standalone player)
- Module only (no MegaGRRL Desktop) — $200 (-$99)