gHashTag · Oct 3, 2026 · Oct 3, 2026 · Oct 3, 2026 · Oct 3, 2026 · Oct 3, 2026
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+<main>
+<div class="top"><a class="brand" href="../../"><img src="../../favicon.svg" alt="">Trinity S³AI</a><a class="all" href="../">All recordings →</a></div>
+<h1>tri devkit · the FPGA flow, layer by layer</h1>
+<p class="lede">One real XC7A200T build: 116.9 s with openXC7, 83.5 s with t27 L3+L4, byte-identical. Place &amp; route is 60%.</p>
+<div id="player"><noscript><figure style='margin:0 0 1.6em;border:1px solid rgba(255,255,255,.08);border-radius:12px;overflow:hidden;background:#000'><div style='padding:8px 12px;background:#0a0a0a;color:#888;font:12px system-ui;text-align:center;border-bottom:1px solid rgba(255,255,255,.08)'>tri devkit · the FPGA flow, layer by layer</div><pre style='margin:0;padding:14px 16px;color:#ebebeb;background:#000;font:12px/1.25 Menlo,monospace;overflow-x:auto'>
+<span style='color:#ebebeb;font-weight:700'>  share of one build</span><span style='color:#ebebeb'>                                                                                    </span>
+<span style='color:#ebebeb'>    L1 synthesis      </span><span style='color:#757575'>████▎</span><span style='color:#ebebeb'>                                     10.9 %                                  </span>
+<span style='color:#ebebeb'>    L2 place &amp; route  </span><span style='color:#5ce1e6'>███████████████████████▉</span><span style='color:#ebebeb'>                  60.0 %                                  </span>
+<span style='color:#ebebeb'>    L3 FASM → frames  </span><span style='color:#00ff88'>███████████▌</span><span style='color:#ebebeb'>                              29.0 %                                  </span>
+<span style='color:#ebebeb'>    L4 frames → .bit  </span><span style='color:#00ff88'>▏</span><span style='color:#ebebeb'>                                          0.2 %                                  </span>
+
+<span style='color:#ebebeb'>Amdahl ceilings: the whole flow if one more layer took 0 s (the most a rewrite could give)              </span>
+<span style='color:#ebebeb'>  L1 synthesis        83.45 s ->  70.76 s    1.65x vs openXC7 today                                     </span>
+<span style='color:#ebebeb'>  L2 place &amp; route    83.45 s ->  13.36 s    8.75x vs openXC7 today                                     </span>
+<span style='color:#ebebeb'>load 13 on 8 cpus; times are wall seconds and move with load -- re-time before quoting                  </span>
+
+<span style='color:#00ff88'>┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓</span><span style='color:#ebebeb'>                                 </span>
+<span style='color:#00ff88'>┃</span><span style='color:#ebebeb'> </span><span style='color:#00ff88;font-weight:700'>✔ t27 layers byte-identical to openXC7: frames True, .bit True</span><span style='color:#ebebeb'>      </span><span style='color:#00ff88'>┃</span><span style='color:#ebebeb'>                                 </span>
+<span style='color:#00ff88'>┃</span><span style='color:#ebebeb'>   one build 116.9 s -> 83.4 s (1.40x), 33.4 s saved                 </span><span style='color:#00ff88'>┃</span><span style='color:#ebebeb'>                                 </span>
+<span style='color:#00ff88'>┃</span><span style='color:#ebebeb'>   L1 and L2 are not rewritten; their rows are ceilings, not results </span><span style='color:#00ff88'>┃</span><span style='color:#ebebeb'>                                 </span>
+<span style='color:#00ff88'>┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛</span><span style='color:#ebebeb'>                                 </span>
+<span style='color:#ebebeb'>flow: SAME  saved 33.4 s per build                                                                      </span>
+<span style='color:#ffd700'>trinity-fpga $ </span><span style='color:#ebebeb'>tri devkit impact --out /tmp/devkit-flow/rec1 --builds 20                                </span>
+<span style='color:#ffd700'>╭────────────────────────────────────────────────────────────────────────╮</span><span style='color:#ebebeb'>                              </span>
+<span style='color:#ffd700'>│</span><span style='color:#ffd700;font-weight:700'> ▼ Trinity S³AI  tri devkit impact</span><span style='color:#ebebeb'>        </span><span style='color:#757575'>the FPGA flow, layer by layer </span><span style='color:#ffd700'>│</span><span style='color:#ebebeb'>                              </span>
+<span style='color:#ffd700'>╰────────────────────────────────────────────────────────────────────────╯</span><span style='color:#ebebeb'>                              </span>
+
+<span style='color:#ebebeb'>measured  116.9 s -> 83.5 s per build, 33.4 s saved   (2026-10-03T11:31:08+0700, load 12.6)             </span>
+<span style='color:#ebebeb'>assumed   20 builds a day, 1 person, 230 working days   (assumptions, not measurements)                 </span>
+<span style='color:#ebebeb'>result    42.7 hours a year of waiting removed                                                          </span>
+<span style='color:#ebebeb'>ceiling   + L1 synthesis: at most 16.2 more hours a year, if it took 0 s                                </span>
+<span style='color:#ebebeb'>ceiling   + L2 place &amp; route: at most 89.6 more hours a year, if it took 0 s                            </span>
+<span style='color:#ebebeb'>impact: 42.7 h/yr measured saving at the stated assumptions                                             </span>
+<span style='color:#ffd700'>trinity-fpga $ </span><span style='color:#ebebeb'>                                                                                         </span></pre></figure></noscript></div>
+<div class="facts"><span>recorded <b>2026-10-03 04:31 UTC</b></span><span>real <b>127.4 s</b></span><span>shown <b>12.2 s</b></span><span>exit codes <b>0 0</b></span></div>
+<div class="cmds"><i>$</i> tri devkit flow --build --out /tmp/devkit-flow/rec1
+<i>$</i> tri devkit impact --out /tmp/devkit-flow/rec1 --builds 20</div>
+<p class="honest">Staged: the prompt and the typing. Real: every byte the commands printed, at the time they printed it. Any silence longer than 2 s is shown for 2 s, and the title bar says so while it happens. Edited: home directory shown as ~.</p>
+<div class="links"><a href="https://t27.ai/#/devkit">Read the post</a><a href="card.png">Preview card</a></div>
+</main>
+<script type="module">
+import { mount } from '../player.js'
+mount(document.getElementById('player'), { src: 'session.cast', share: 'https://t27.ai/term/devkit-flow/', title: "tri devkit \u00b7 the FPGA flow, layer by layer" })
+</script>
+</body>
+</html>
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+{
+  "id": "devkit-flow",
+  "title": "tri devkit · the FPGA flow, layer by layer",
+  "desc": "One real XC7A200T build: 116.9 s with openXC7, 83.5 s with t27 L3+L4, byte-identical. Place & route is 60%.",
+  "url": "https://t27.ai/term/devkit-flow/",
+  "post": "https://t27.ai/#/devkit",
+  "recorded": "2026-10-03 04:31 UTC",
+  "real_s": 127.4,
+  "shown_s": 12.2,
+  "commands": [
+    "tri devkit flow --build --out /tmp/devkit-flow/rec1",
+    "tri devkit impact --out /tmp/devkit-flow/rec1 --builds 20"
+  ],
+  "exit_codes": [
+    "0",
+    "0"
+  ],
+  "redacted": [
+    "home directory shown as ~"
+  ],
+  "published": "2026-10-03"
+}
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