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.Dd September 6, 2018
.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 xxxxxxxxxx -offset indent
.It Xr esp 4
NCR53c94 and compatible
.Tn SCSI
interfaces.
.It Xr isp 4
Qlogic
.Tn SCSI
interfaces.
.El
.Ss Network interfaces
.Bl -tag -width xxxxxxxxxx -offset indent
.It Xr le 4
.Tn Lance
7990 series
.Tn Ethernet
interfaces.
.It Xr hme 4
.Dq Happy Meal
.Tn Ethernet
interfaces.
.It Xr be 4
.Dq Big Mac
.Tn Ethernet
board.
.It Xr qe 4
Quad Ethernet Controller
board.
.El
.Ss Bridges
.Bl -tag -width xxxxxxxxxx -offset indent
.It Xr xbox 4
an
.Nm Sbus
expansion box.
.El
.Ss Graphics devices
.Bl -tag -width xxxxxxxxxx -offset indent
.It Xr bwtwo 4
framebuffer device.
.It Xr cgthree 4
framebuffer device.
.It Xr cgsix 4
framebuffer device.
.It Xr pnozz 4
framebuffer device.
.It Xr tcx 4
framebuffer device.
.It Xr zx 4
framebuffer device.
.El
.Ss Audio devices
.Bl -tag -width xxxxxxxxxx -offset indent
.It Xr audiocs 4
CS4231 codec.
.El
.Ss Serial interfaces
.Bl -tag -width xxxxxxxxxx -offset indent
.It Xr magma 4
Magma Serial/Parallel combo device.
.El
.Ss Floppy interfaces
.Bl -tag -width xxxxxxxxxx -offset indent
.It Xr fdc 4
Floppy disk controller
.El
.Sh SEE ALSO
.Xr intro 4
.Sh HISTORY
The machine-independent
.Nm SBus
subsystem appeared in
.Nx 1.3 .