uturn —
U2/Uturn, Runway to GSC Bus bridge & IOA
uturn* at mainbus?
astro* at uturn?
dino* at uturn?
lasi* at uturn?
gecko* at uturn?
sti* at uturn?
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.
astro(4),
cpu(4),
dino(4),
gecko(4),
gsc(4),
intro(4),
pci(4),
runway(4),
sti(4)
The
uturn driver appeared in
OpenBSD 3.7.
![[OpenBSD]](/openbsd.gif){kind=small}