UTURN(4) | Device Drivers 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.

April 27, 2008 | Debian