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.\"	$NetBSD: sbus.4,v 1.8 2008/04/30 13:10:54 martin Exp $
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.Dd March 28, 2007
.Dt SBUS 4
.Os
.Sh NAME
.Nm SBus
.Nd introduction to machine-independent SBus bus support and drivers
.Sh SYNOPSIS
.Cd "sbus* at mainbus?"
.Cd "sbus* at iommu?"
.Cd "sbus* at xbox?"
.Pp
These
.Nm
attachments are specific to the
.Nx Ns /sparc
and
.Nx Ns /sparc64
ports.
.Sh DESCRIPTION
.Nm
is a I/O interconnect bus mostly found in
.Tn SPARC
workstations and small to medium server class systems. It supports both
on-board peripherals and extension boards. The
.Nm
specifications define the bus protocol as well as the electrical and
mechanical properties of the extension slots.
.Sh HARDWARE
.Nx
includes machine-independent
.Nm
drivers, sorted by device type and driver name:
.Ss SCSI interfaces
.Bl -tag -width xxxxxxxx -offset indent
.It esp
NCR53c94 and compatible
.Tn SCSI
interfaces.
.It isp
Qlogic
.Tn SCSI
interfaces.
.El
.Ss Network interfaces
.Bl -tag -width xxxxxxxx -offset indent
.It le
.Tn Lance
7990 series
.Tn Ethernet
interfaces.
.It hme
.Dq Happy Meal
.Tn Ethernet
interfaces.
.It en
Midway-based Efficient Networks Inc. and Adaptec ATM interfaces.
.It be
.Dq Big Mac
.Tn Ethernet
board.
.It qe
Quad Ethernet Controller
board.
.El
.Ss Bridges
.Bl -tag -width xxxxxxxx -offset indent
.It xbox
an
.Nm Sbus
expansion box.
.El
.Ss Graphics devices
.Bl -tag -width xxxxxxxx -offset indent
.It bwtwo
framebuffer device.
.It cgthree
framebuffer device.
.It cgsix
framebuffer device.
.It pnozz
framebuffer device.
.It tcx
framebuffer device.
.It zx
framebuffer device.
.El
.Ss Audio devices
.Bl -tag -width xxxxxxxx -offset indent
.It audiocs
CS4231 codec.
.El
.Ss Serial interfaces
.Bl -tag -width xxxxxxxx -offset indent
.It magma
Magma Serial/Parallel combo device.
.El
.Sh SEE ALSO
.Xr audiocs 4 ,
.Xr be 4 ,
.Xr bwtwo 4 ,
.Xr cgsix 4 ,
.Xr cgthree 4 ,
.Xr en 4 ,
.Xr esp 4 ,
.Xr hme 4 ,
.Xr intro 4 ,
.Xr isp 4 ,
.Xr le 4 ,
.Xr magma 4 ,
.Xr pnozz 4 ,
.Xr qe 4 ,
.Xr tcx 4 ,
.Xr xbox 4 ,
.Xr zx 4
.Sh HISTORY
The machine-independent
.Nm SBus
subsystem appeared in
.Nx 1.3 .