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TheYamahaY8950is asound chip,produced in 1984. It is also known asMSX-Audioas it was designed for inclusion in an expansioncartridgefor theMSXpersonal computer.
The Y8950 is essentially aYamaha YM3526with anADPCMencoder/decoderadded on. It was introduced in three cartridge models:
- Philips NMS-1205
- Toshiba HX-MU900
- Panasonic FS-CA1
Features
edit- Compatible with the Yamaha YM3526 (OPL)
- Nine voices ofFM synthesis(usingphase 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 andteletex).
- Built-in vibrato andAMoscillators
- Built-inaccelerated4-bitADPCMspeech analysis/synthesiscircuits
- Possibility of connecting an external 256-kBRAMplus 256-kBROM
- 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
- TTLcompatible input/output
- Si-gateCMOSLSI
- 5V single power supply
- 64-pin SDIP encapsulation (the same thing was done on theV9938)
Software Support
editThe 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 theADPCMsample unit. Other software which makes use of theADPCMsampler 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 byCompileon the MSX were MSX-Audio compatible, although they didn't use the ADPCM sampler portion of the sound chip.
See also
editReferences
edit- The Ultimate MSX FAQ -MSX-Audio Section(Retrieved on 2008-01-02).