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feat(audio): implement nominal Direct Sound playback and FIFO DMA

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0xrsydn 2026-10-07 01:35:55 +07:00
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docs/usability-roadmap.md
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@ -39,8 +39,9 @@ The [pinned Pong homebrew](public-pong.md) passes scripted menus, ball movement,
The native Darwin window also starts and presents frames without a diagnostic.
This exposed and corrected missing firmware affine-scale initialization, without a game-specific patch.
Frame-based scenarios and the preparation adapter now make the result repeatable.
A local Emerald run now passes its initial all-device reset and stops at sound master enable.
See [the runtime result](research/emerald-reset.md). Active audio-device behavior is the next demonstrated startup requirement.
A local Emerald run now passes its initial all-device reset and master sound enable, then stops at a PSG channel 1 trigger.
The core has a tested Direct Sound subset, but no continuous sample stream or desktop audio output.
See [the runtime result](research/emerald-reset.md). PSG playback is the next demonstrated startup requirement.
The separate save requirement remains cartridge SRAM, followed by safe host save persistence.
SRAM is byte-addressable battery-backed save memory. Flash and EEPROM remain separate protocols.