> H_RAW_FRAME_WRITE(handle=0xFF, offset=0x0000, data=0xDEADBEEF)

The fix was simple: add one line to every H Series startup script.

Twenty seconds. An eternity in live events. Then:

She wrote a post-mortem that night. Subject line: . Attachment: H_BUS_FILTER_v2.api .

> H-series v4.2.7 // Controller: H9 // Status: NOMINAL

But the data wasn’t video. It was a bootloader. A tiny, 64-byte payload designed to rewrite the H9 controller’s real-time OS.