# Ch401 — fuller 56-draw static frame

Ch401 retains the accepted Ch400 chronological base, one correctly paired ABE
draw, two later-scene anchors, and the proven 24-draw central cluster. The
result is 56 authentic draws in 28 bounded epochs, within the existing 32-epoch
host/testbench limit.

## Simulation

- 638,022 fragments fed
- 321,817 fragments passed Z
- 28 ordered drains
- zero request drops, color FIFO overflows, or AXI BRESP errors
- Z mismatches: 0 / 307,200
- color mismatches: 0 / 128,998

## Silicon

No RTL changed after the accepted Ch400 RBF. The 28-epoch board run passed all
texture CRC, runtime palette, staging, record-count, drain, and zero-drop gates
and returned `rc=0`.

- nonzero pixels: 128,998
- bounds: `(36,10)..(599,399)`
- board/simulation MEM SHA-256:
  `0383cc739aa8e9b921489a3fc1ffca7ab2a48763cb57028d4a90e3ae9a34142f`
- board/simulation PNG SHA-256:
  `a4806d0ba39fcea1b904375f715d11f7a81d1364c78f201f40c1bb5906ac008b`

Board and simulation are byte-exact over all 307,200 framebuffer words.
Ch401 is accepted on silicon and remains displayed through the LPDDR HDMI
scanout.
