# Custom firmware ## Identification Firmware built or modified outside a device vendor's ordinary release channel. The notebook connects it to BittBoy/PocketGo handhelds, DFU, OTA updates, and emulator distributions. ## Notebook evidence - [[Scanned_20260730-1946|Scanned_20260730-1946]], PDF pages 8-10. ## Relationships and evidentiary boundary [[Device Firmware Upgrade]] · [[Dingux]] · [[OpenDingux]]. The notebook occurrence records research context and page-level proximity. It does not by itself establish ownership, deployment, compromise, coordination, or present-day status.