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PCONS(4) Device Drivers Manual (sparc64) PCONS(4)

SPARC64 PROM console interface

pcons0 at mainbus0
wsdisplay* at pcons?

The pcons device provides a simple text console, using the PROM services for input and/or output if no other driver handles this task. It will use the PROM console devices set via the “input-device” and “output-device” variables.
This driver is provided as a fallback console mechanism if the real console hardware cannot be driven in OpenBSD.


intro(4), tty(4)

OpenBSD support for the PROM console first appeared in OpenBSD 3.0.

If pcons handles console input, the PROM will handle break (or Stop-A) sequences before pcons. The preferred way to enter ddb(4) on a ddb-enabled pcons console is then to enter the following sequence : ‘+++++’
November 1, 2015 OpenBSD-current