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ScottW514
009944a29b
Scope on GPIO2_IO30 (the SoC FIRE drive): two 2.000 s FIRE windows, the second terminated only by the SDMA end-of-data backstop. Measured 2.0000 s exactly with clean edges on BOTH termination paths - normal completion and true underrun (streaming=1, kernel underrun state reached and acked; fire_test.py gains the U mode). The backstop drops FIRE within one tick regardless of how the stream dies. With the waveform, stream-path, latch, topology, and interlock- semantics results from earlier today, every standing hardware verification gate for live fire is now passed; what remains is the laser-milestone software and a chain-armed first-light procedure.