mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 02:11:36 -04:00
Matthew Stanley
7e1421be7c
The first FMV A/B was run on a fresh worktree whose overlay shard cache was cold AND whose autocompile could never work: game.toml points at psxrecomp-v4/recompiler/build-t2/psxrecomp-game.exe while the documented build recipe builds the recompiler at build-recompiler/ in the worktree root, so it failed 8/8 with WinError 2 and the runtime silently ran interpreted (dispatch_native = 0). The '40 fps / ~19 underruns per second' attributed to master in the previous commit was that broken setup, not master. Re-measured against the fully warm cache with the pre-SPU exe as a control in the same worktree: interp_share 0.7813 vs 0.7775, exc_share 0.2386 vs 0.2381, 39.1 vs 38.0-38.4 fps. Identical within noise, so the DSP work is free. Separately characterises the real pre-existing defect: the FMV is 96% native by dispatch count but 78% interpreted by wall clock with 24% in exception handling, even warm. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Internal dev-logs & design notes
These are the working design documents and burn-down logs the project was built from. They are historical/working notes, not contributor onboarding docs — they capture decisions, phased plans, and deep subsystem investigations in the order they happened, and some sections are superseded by later ones.
If you're new here, start with the top-level README.md,
then docs/ARCHITECTURE.md,
docs/EXECUTION_MODEL.md,
docs/BUILDING.md, and
CONTRIBUTING.md. Come here when you need the why
behind a specific subsystem.
Plans & roadmap
PLAN.md— the original phased build plan (P1–P6).FAITHFUL_TIMING_PLAN.md— the authoritative cycle-accuracy north-star plan and status log.FIRST_MILESTONE.md— the first-boot milestone gate.STUBS_TO_FIX.md— hardware-stub burn-down (pre-game gate).
Cycle accuracy & timing
PRECISE_IRQ_SLICE.md— exact-instruction IRQ delivery.CYCLE_MODEL_BEETLE.md— the Beetle-derived cycle model.ACCURACY_BURNDOWN.md— full accuracy burn-down across all axes (semantics, cycle, IRQ, MMIO, peripherals, determinism).COSIM_ORACLE.md— the first-divergence co-sim oracle.
BIOS / scheduler
HLE_SCHEDULER_CARVEOUT_PLAN.md— the cooperative-thread scheduler HLE carve-out.WEDGE_load4_shell_rootcause.md— a specific boot-shell wedge root-cause writeup.
Renderer / widescreen
GL_RENDERER_HANDOFF.md— OpenGL renderer design.NATIVE_WIDE_PLAN.md— native-wide 16:9 (GTE FOV) plan.BACKDROP_PRELOAD.md— widescreen backdrop preload.
Overlay cache internals
SLJIT_PERSIST_CACHE.md— persisted overlay-shard cache design.