IGC decode: convergence experiment negative; OPF2(145) = next suspect

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-18 03:26:09 -05:00
parent 6c3dc2e954
commit 12673c5a22
1 changed files with 7 additions and 0 deletions
@@ -264,3 +264,10 @@ MEMintoENAB, SHIFTL-family, send_em's DMA emit). Output: the op table
 2. execute per-tile via igc_array.py (pixel-memory model exists there);
 3. acceptance 1 = SMPTE bars from the cap7 bench stream; acceptance 2 = the
   fxtest asset frame.
+
+## Overnight experiment log (2026-07-18)
+- Multi-frame convergence: NEGATIVE — 5 iterations of the 4-block tile program
+  are state-stable; nothing implemented propagates s145(x) into texz/texu.
+- Next suspect: OPF2 = 0x3a90f291 reads addr 145 (the SCMEMA x-target!) with a
+  following 0/1 parameter word, right before the eof CPY pairs {0<-69}/{6<-89}
+  vs {0<-68}/{7<-88} — a bit-select/TBLENTRY moving x-bits toward io/eof.