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retroDE_ps2/docs/ch361_audit_log.md
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thejayman77 ba74bbd5aa Snapshot: fog implementation + fidelity tooling baseline (pre bilinear-clamp fix)
Per-vertex GS fog end-to-end (gs_stub emit incl. persp_emit5, gs_prim_list_feeder
XYZ2->XYZF2 on PRIM.FGE, gs_make_sh3_scheduler_fixture.py F/FGE packing), new fog
TBs, fidelity attribution tooling. Functional baseline before removing the dead
bilinear lerp8 clamps (Codex: 161-node comb loop -> -0.042ns setup fail).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-20 19:56:46 -04:00

1.1 KiB

Ch361 audit log -- C18 draw-count scaling

Scope

Eighteen authentic, in-bounds SH3 PSMT8 draws were grouped into six ordered 204-triangle epochs at native 640x480. They share tbp=8192, cbp=13888, byte-identical texture/CLUT contents, and authentic ZTE=1, GEQUAL, ZMSK=0, PSMZ16S state.

Evidence

  • Fixture preflight passed; fixed PSCALE=1024 and rounded XY were retained.
  • Capture gate passed: ALL 44890/49149 (91.3%), MULTI 24969/26680 (93.6%), clut_bad=0, one fill plus five reuses, six fresh drains, no overflow or underflow.
  • Real Z integration passed: 205744 fragments, 103300 Z passes, zero drops, exact Z 0/307200 and color 0/49071.
  • Board host gate passed: six 204-record epochs, one fill, five resident reuses, zero drops, 49071 nonzero pixels.
  • Board framebuffer and Z integration framebuffer SHA-256: a0eda56ef0140749451078a0fc82d85ea6e3342734dacdc22dd93f0a56dbb539.
  • Replay-color is exact: 307200/307200; 205744 fragments, 103300 Z-pass updates, 49071 covered pixels.

Result

Ch361 is closed on silicon with no RTL, SDC, QSF, or RBF change from the C6-signoff core.