From 6bb2023a419e56a50cd40fb407abd9dda250d088 Mon Sep 17 00:00:00 2001 From: Gabriel Schneider Date: Tue, 25 Aug 2026 21:39:03 -0300 Subject: Report: the clock, the renderer, and a minimum frame owned by the USB bridge Brings the document up to the end of Experiment 4. Two rows on the progression table - 360 MHz and direct emission - plus the sections behind them, the corrected verifier, and a summary that no longer says the target was missed. It is met: 3.74 ms from 16.99. The two findings worth more than the number, and both are written up as findings rather than as steps: A 4x clock bought 2.6x. The grid walk reads 27 KB a frame at about six cycles a byte, so it is bounded by L2MEM bandwidth and does not care how fast the core runs. Predicted before the measurement. The direct renderer measured SLOWER at first - less computation, a quarter of the bytes, worse round trip - because the CH340 forwards a bulk IN packet only when the packet is full, and a 21-byte frame does not fill 32. It waits about a millisecond for a timer. So the frame has a minimum size and it belongs to the transport, not the terminal; the emitter pads to it with repeated cursor positioning. The table of 21/49/81-byte frames is in the report because the MINIMUM column is the tell: the small frame's floor was already 530 us below vaxis's, exactly the compute saved, and only the median was hostage. Also corrected: the verifier section. It described hashing SGR parameters per cell, which is a history rather than a state, and that version reported a difference on the die that did not exist - a faster board split the same keystrokes across different frames and reached the same colours by another route. The document now says what it does instead, and why the from-scratch renderer could not have been verified without the fix. Table 13, the ranked recommendations from Experiment 3, is kept as the prediction it was with a note on what has since been applied and that row 3 - raise the line rate - was abandoned. The threats section no longer states the link floor as a single number, since the bridge's packet granularity is now part of it and is specific to this bridge. Nine pages. Every figure still reads the raw per-trial CSVs, including the two new ones. --- experiments/pg-7.png | Bin 248684 -> 348546 bytes 1 file changed, 0 insertions(+), 0 deletions(-) (limited to 'experiments/pg-7.png') diff --git a/experiments/pg-7.png b/experiments/pg-7.png index cb9c41e..0a08184 100644 Binary files a/experiments/pg-7.png and b/experiments/pg-7.png differ -- cgit v1.3