Publish Chimera GFX source

2026-09-03 02:53:36 +02:00
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+# ADR-0012: Phase-1.0J first-frame identity
+
+- Status: accepted for offline diagnostic construction
+- Date: 2026-07-22
+- Decision: `FIRST_FRAME_INDEX_ZERO_SOURCE_CONSISTENCY_ONLY`
+
+## Context
+
+The consumed Phase-1.0H run submitted the diagnostic buffer with
+`sceVideoOutSubmitFlip(handle, 0, 1, 0)` and received `-1`. The diagnostic
+helper used buffer zero, while the patched normal SDL update path started its
+frame counter at one. The public PS5 SDL source at commit
+`0baf4ac49382b537ba449901b5b6d0d189bb1fbb` starts that normal counter at
+zero. Phase 1.0I classified the mismatch as a strong source candidate, not a
+proven firmware root cause.
+
+## Decision
+
+The Phase-1.0J SDL overlay defines one compile-time source of truth,
+`CHIMERA_PS5_FIRST_FRAME_INDEX`, with value zero. The early diagnostic copy,
+the early diagnostic submit and the normal update counter all derive their
+initial index from that macro.
+
+Zero is selected because it preserves the already-audited diagnostic tuple
+and agrees with the public SDL source. It is not selected on the basis of an
+unpublished ABI or an inferred firmware requirement.
+
+## Consequences
+
+The internal zero-versus-one inconsistency is removed and can be checked in
+source, linker-map and disassembly evidence. This decision does not prove that
+buffer zero is accepted on firmware 9.60, that the fourth flip argument has
+the required semantics, or that the old mismatch caused the Phase-1.0H
+failure.
+
+Phase 1.0J remains an offline artifact phase. A separately reviewed exact
+artifact and new explicit permission would be required before any connection,
+transfer, result reception or execution.