sbus(4) on OpenBSD
The text f46deca8b7cd, as OpenBSD 8.0-current (2026-11-01), OpenBSD 8.0, OpenBSD 7.9, OpenBSD 7.8, OpenBSD 7.7, OpenBSD 7.6, OpenBSD 7.5, OpenBSD 7.4, OpenBSD 7.3, OpenBSD 7.2, OpenBSD 7.1, OpenBSD 7.0 shipped it. The page shows this text now.
introduction to SBus bus support