March 28, 2007 SBUS 4

### NAME

SBus - introduction to machine-independent SBus bus support and drivers

### SYNOPSIS

sbus* at mainbus? sbus* at iommu? sbus* at xbox?

These SBus attachments are specific to the NetBSD/sparc and NetBSD/sparc64 ports.

### DESCRIPTION

SBus is a I/O interconnect bus mostly found in SPARC workstations and small to medium server class systems. It supports both on-board peripherals and extension boards. The SBus specifications define the bus protocol as well as the electrical and mechanical properties of the extension slots.

### HARDWARE

NetBSD includes machine-independent SBus drivers, sorted by device type and driver name:

#### SCSI interfaces

esp
  NCR53c94 and compatible SCSI interfaces.

isp
  Qlogic SCSI interfaces.

#### Network interfaces

le
  Lance 7990 series Ethernet interfaces.

hme
  ``Happy Meal'' Ethernet interfaces.

en
  Midway-based Efficient Networks Inc. and Adaptec ATM interfaces.

be
  ``Big Mac'' Ethernet board.

qe
  Quad Ethernet Controller board.

#### Bridges

xbox
  an Sbus expansion box.

#### Graphics devices

bwtwo
  framebuffer device.

cgthree
  framebuffer device.

cgsix
  framebuffer device.

pnozz
  framebuffer device.

tcx
  framebuffer device.

zx
  framebuffer device.

#### Audio devices

audiocs
  CS4231 codec.

#### Serial interfaces

magma
  Magma Serial/Parallel combo device.

### SEE ALSO

audiocs(4), be(4), bwtwo(4), cgsix(4), cgthree(4), en(4), esp(4), hme(4), intro(4), isp(4), le(4), magma(4), pnozz(4), qe(4), tcx(4), xbox(4), zx(4)

### HISTORY

The machine-independent SBus subsystem appeared in NetBSD1.3.