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Yamaha Y8950

The Yamaha Y8950 is a sound chip, produced in 1984. It is also known as MSX-Audio as it was designed for inclusion in an expansion cartridge for the MSX personal computer.

Y8950

The Y8950 is essentially a Yamaha YM3526 with an ADPCM encoder/decoder added on. It was introduced in three cartridge models:

Features Edit

  • Compatible with the Yamaha YM3526 (OPL)
  • Nine voices of FM synthesis (using phase modulation)
  • Two sound-generation modes available: Simultaneous sounding of nine tones or 6 melodies and five rhythms (Compatible with the Character and Pattern Telephone Access Information Network (C.A.P.T.A.I.N.) system and teletex).
  • Built-in vibrato and AM oscillators
  • Built-in accelerated 4-bit ADPCM speech analysis/synthesis circuits
  • Possibility of connecting an external 256-kB RAM plus 256-kB ROM
  • Built-in 8-bit input/output ports for keyboard scanning
  • Built-in 4-bit general purpose I/O port
  • Two built-in general purpose timers
  • TTL compatible input/output
  • Si-gate CMOS LSI
  • 5V single power supply
  • 64-pin SDIP encapsulation (the same thing was done on the V9938)

Software Support Edit

The Y8950 is supported by almost all software which contains music composed in SoundTracker, (Moonblaster, Oracle, Super Music Editor or Magic Music Module Combi, etc.). All these editors support the ADPCM sample unit. Other software which makes use of the ADPCM sampler such as Trax Player by NOP (a program to play songs (samples) directly from disk, while loading) also supports it.

The majority of games made by Compile on the MSX were MSX-Audio compatible, although they didn't use the ADPCM sampler portion of the sound chip.

See also Edit

References Edit

  • The Ultimate MSX FAQ - MSX-Audio Section (Retrieved on 2008-01-02).

External links Edit

  • Frequently asked questions about MSX-music

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