XBOW(4) OpenBSD Programmer's Manual (SGI) XBOW(4)NAMExbow - Octane and Origin family XIO bus
SYNOPSIS
xbow0 at mainbus0
DESCRIPTION
The xbow driver provides support for the XIO bus found on SGI `ccNUMA'
designs, such as the Octane (IP30) and Origin (IP27 and IP35) families,
as well as related systems such as Onyx and Tezro.
XIO components are called `widgets' and contain either I/O devices,
processors, or memory.
A XIO bus supports up to 16 widgets, but the existing designs only use up
to 8.
Special `hub' widgets allow several XIO buses to be interconnected,
expanding the capacity of a given system, and allowing complex multi-node
systems to be built.
The widgets currently supported under OpenBSD are:
impact(4) SGI Impact (aka Mardigras) graphics
odyssey(4) SGI VPro (aka Odyssey) graphics
xbridge(4) XIO-PCI bridge
xheart(4) Octane core system widget
SEE ALSOintro(4), mainbus(4)HISTORY
The xbow driver first appeared in OpenBSD 4.4.
OpenBSD 4.9 March 7, 2010 OpenBSD 4.9