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UPA(4) Device Drivers Manual (sparc64) UPA(4)

upa
SPARC64 Host/UPA bridge

upa* at mainbus0
creator* at upa0

The upa device provides support for the upa bus on sparc64 systems, most often found on UltraSPARC III based systems.

creator(4), intro(4)

OpenBSD support for the upa first appeared in OpenBSD 3.2.
May 31, 2007 OpenBSD-current