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125000 bench: RX overrun confirmed (NAK=1082, lamps dead) — CPU is the wall

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Board->PC near-perfect at 125k (framing 5) while PC->board shredded by
packet length (2-byte polls 60% delivered, 4-byte lamp cmds ~2/3 NAKed
as checksum-corrupt): the 2MHz HC11 RX ISR can't drain back-to-back
bytes at 80us. MAX232 acquitted; zero wedges even at 40% inbound loss.
62500 image built as the sweet-spot candidate (RIOv4_2_patched_62500.bin).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Cyd
2026-07-18 12:57:51 -05:00
co-authored by Claude Fable 5
parent 4b283b976e
commit e718ddebfd
4 changed files with 13214 additions and 0 deletions
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testlogs/riomash-patched-125000-20260718-125310.log
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== RIO mash test :: COM1 @ 125000 8N1, 300s, chip label 'patched-125000' ==
lamp echo ON (drives reply/lamp collisions), wedge threshold 2.0s, app auto-recovery DISABLED
log: C:\VWE\riojoy\riomash-patched-125000-20260718-125310.log
firmware: 4.2
counters before: (no status reply — reply path dead?)
>>> MASH NOW: two hands, 8 lamp buttons, as fast as you can. <<<
>>> Test runs 300s. A wedge alarm will beep + banner. <<<
>>> Ctrl+C ends the run early and still prints the summary. <<<
[ 33.05s] progress: presses=147 (147/min) analog=344 maxGap=0.31s wedges=0
[ 63.12s] progress: presses=472 (449/min) analog=668 maxGap=0.37s wedges=0
[ 93.14s] progress: presses=741 (477/min) analog=999 maxGap=0.44s wedges=0
[ 103.09s] operator stop (Ctrl+C) — ending run, snapshotting counters...
== MASH SUMMARY [patched-125000] ==
run : 103s on COM1, lamps on, wedge threshold 2.0s
firmware : 4.2
presses/releases : 827 / 824 (470 presses/min)
analog replies : 1134 (~1872 poll slots; 60.6%), sentinels 0
framing / NAK : 5 / 1082
gap histogram : <100ms:804 100-250ms:298 250-500ms:30 0.5-1s:1 1-2s:0 2-5s:0 >5s:0
longest gaps : 0.52s@95.7s, 0.44s@63.3s, 0.44s@86.0s, 0.38s@79.8s, 0.37s@56.4s, 0.37s@73.4s, 0.37s@81.5s, 0.34s@95.3s, 0.31s@40.8s, 0.31s@58.4s
wedge events : 0
counters before : (no status reply — reply path dead?)
counters after : (no status reply — reply path dead?)
counter delta : (incomplete — a snapshot got no reply)
verdict : PASS — no wedge; compare gap histogram + counter delta to baseline
log file : C:\VWE\riojoy\riomash-patched-125000-20260718-125310.log