YMF271: new OPX core - #158
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Replaces the MAME-derived YMF271 core with a new implementation written from the datasheet and application manual and calibrated against real hardware recordings (Jaleco MS32, Seibu SPI, PS Arcade 95 titles). - OPM-style log-sin/exp operator pipeline with detune, rate key scaling, per-slot LFO (rate table 2-6-2, PMS/AMS depths) and the 7 internal waveforms - all sync modes (4op / 2x2op / 3op+PCM / PCM) with register broadcast to the voice's slots, F-number latch, End flags cleared on status read - AccOn modelled as a saturating accumulator - external PCM: 8-bit and packed 12-bit samples, linear interpolation, Fs divider, external key code, looping and End flags - timers, external memory window Compile with YMF271_OPX_DEBUG for a debugging interface (ymf271_opx.h: state snapshots, group solo / slot mute, key-on dump via environment variables). AI disclosure: Claude Fable 5
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Huge thanks! |
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Replaces the MAME-derived YMF271 core with a new implementation written from the datasheet and application manual and calibrated against real hardware recordings (Jaleco MS32, Seibu SPI, PS Arcade 95 titles).
Compile with YMF271_OPX_DEBUG for a debugging interface (ymf271_opx.h: state snapshots, group solo / slot mute, key-on dump via environment variables).
AI disclosure: Claude Fable 5