# Ch367 Audit Log - Runtime CLUT At 24 Draws

## Scope

Join the established native-640x480 24-draw shared-texture cluster to the runtime CLUT transport. The fixture has
eight ordered 204-record epochs, one texture fill, seven CRC-verified residency reuses, and a host runtime palette
copy before every epoch.

## FIFO Sizing

- At request depth 1024, the runtime fixture removes the boot-time CLUT-loader throttle and epoch 2 dropped 19
  fragments after the high-water counter saturated at 1024.
- At depth 2048, epoch 2 accepted all 58,861 fragments at high-water 1041. Integration simulation also passed
  epochs 0 through 6 with zero drops; epoch 5 was the largest observed simulation burst at 1855.
- The DE25 top therefore changes only `u_zc_emit` request depth from 1024 to 2048. No clock, SDC, or protocol
  change is involved; `zc_g_drops` remains the fail-closed hardware guard.

## GUI Fit And Board Gate (2026-07-12)

- Quartus 26.1 STA finished at 08:40:47 and met every requirement: setup +0.090 ns, hold 0.000 ns, recovery
  +1.043 ns, removal +0.201 ns, and minimum pulse width +0.200 ns.
- The 08:41 core RBF SHA-256 is `8e3fa2b8b14de9b4660a542ec7ffed5c59353ec8583458f31339a4b4183f42d2`; fit reports
  the request FIFO as a 2048 x 74 dual-clock M20K implementation.
- The RBF was SHA-verified on the DE25 and loaded through `core_loader.sh`; `fpga0` reported `operating` and the
  overlay reported `applied`.
- Board scheduler gate: all eight 204-record epochs drained freshly; one texture CRC-verified fill and seven
  resident CRC checks passed; every runtime palette sum was `0x47097d4c`; every epoch reported zero drops.
- Board dump: 73,330 nonzero pixels, bounds `(84,85)..(568,399)`, sum `0xc521381a`, xor `0x8021455e`.

## Exact Closure

- The trace-enabled integration run passed all eight epochs: 346,425 accepted fragments, 167,247 persistent-Z
  updates, eight scene markers/drains, zero drops, and exact local scoreboards (Z `0/307200`, color `0/73330`).
- The highest simulated request-FIFO occupancy was 1855 in epoch 5; the final epoch reached 1156. Both remain below
  the production 2048 entries and agree with the board's zero-drop counters.
- Board and integration-simulation framebuffers are byte-identical with SHA-256
  `6614d7211b9a668cfeda12e4fa2d6f469d3ee4d3a10bdf56c0119b35f93c7803`.
- Replay-color is exact at `307200/307200` pixels: 346,425 fragments, 167,247 Z-pass updates, 73,330 covered
  pixels, and zero uncovered writes.

## Result

Ch367 is closed on silicon: 24 authentic SH3 draws, runtime CLUT staging on every epoch, one texture fill plus
seven verified resident reuses, native 640x480 scanout, and persistent depth all agree with integration simulation
and the independent replay oracle.
