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BEEPER(4) Device Drivers Manual (sparc64) BEEPER(4)

beeper, beep
console annunciator

beeper* at ebus?
beep* at ebus?

The beeper device does exactly what it sounds like: it beeps. In particular, this device registers itself to handle beeping for pckbd(4) or ukbd(4) devices.

ebus(4), intro(4), pckbd(4), ukbd(4)

OpenBSD support for the beeper first appeared in OpenBSD 3.0.
November 21, 2015 OpenBSD-current