UTURN(4)              OpenBSD Programmer's Manual (HPPA)              UTURN(4)

NAME
     uturn - U2/Uturn, Runway to GSC Bus bridge & IOA

SYNOPSIS
     uturn* at mainbus?
     astro* at uturn?
     dino* at uturn?
     lasi* at uturn?
     gecko* at uturn?
     sti* at uturn?

DESCRIPTION
     uturn provides the functionality of IOA (not currently supported) as a
     bridge from the Runway bus (see runway(4) for more information) to GSC.
     Modern systems, based on the PA-8000 and later 64-bit CPUs, use the U-
     Turn version, whilst earlier systems, based on the PA-7200 CPU, used a
     different version of the chip called U2.

SEE ALSO
     astro(4), cpu(4), dino(4), gecko(4), gsc(4), intro(4), pci(4), runway(4),
     sti(4)

HISTORY
     The uturn driver appeared in OpenBSD 3.7.

OpenBSD 4.7                     April 27, 2008                               1
