thejayman77
ec82764bef
RTL (GS rasterizer, EE core stub, platform bridge, LPDDR4B path), sim regression (272 TBs), docs, and tooling. Copyrighted PS2 content (BIOS, game code, GS dumps, and all dump-derived textures/traces) is excluded via .gitignore and stays local. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
43 lines
833 B
Markdown
43 lines
833 B
Markdown
# SPU2 Contract
|
|
|
|
Status: `Draft`
|
|
|
|
## Purpose
|
|
|
|
Define the audio subsystem boundary.
|
|
|
|
## Owns
|
|
|
|
- SPU2 register-visible state,
|
|
- SPU2 RAM interface,
|
|
- DMA/AutoDMA coordination,
|
|
- audio sample generation/mixing,
|
|
- handoff into retroDE audio output.
|
|
|
|
## Inputs
|
|
|
|
- IOP-side register writes,
|
|
- DMA traffic,
|
|
- reset/clocking controls.
|
|
|
|
## Outputs
|
|
|
|
- audio samples or intermediate audio stream,
|
|
- interrupt/status signals,
|
|
- trace events.
|
|
|
|
## Questions to lock
|
|
|
|
- Is any audio required before first "system boot" milestone?
|
|
- What is the first useful milestone:
|
|
- register visibility only
|
|
- DMA playback path
|
|
- simple tone / RAM playback
|
|
- Where should final resampling/adaptation to platform audio occur?
|
|
|
|
## Allowed early stubs
|
|
|
|
- register-visible no-audio model,
|
|
- test-tone generator,
|
|
- RAM playback without full SPU2 effects path.
|