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.\"	$NetBSD: sn.4,v 1.2 2009/05/17 02:36:10 fair Exp $
.\"
.Dd May 16, 2009
.Dt SN 4
.Os
.Sh NAME
.Nm sn
.Nd National Semiconductor DP83932 (SONIC) based Ethernet device driver
.Sh SYNOPSIS
.Ss arc
.Cd "sn0 at jazzio?"
.Ss mac68k
.Cd "sn* at obio?"
.Cd "sn* at nubus?"
.Sh DESCRIPTION
The
.Nm
interface provides access to a 10 Mb/s Ethernet network via the
National Semiconductor DP83932
.Pq Tn SONIC
Ethernet chip set.
.Pp
Each of the host's network addresses is specified at boot time with an
.Dv SIOCSIFADDR
.Xr ioctl 2 .
The
.Nm
interface employs the address resolution protocol described in
.Xr arp 4
to dynamically map between Internet and Ethernet addresses on the
local network.
.Sh HARDWARE
.Ss arc
The
.Nm
driver supports on-board JAZZ based SONIC interfaces found
on Acer PICA and NEC machines.
.Ss mac68k
The
.Nm
driver is currently known to support the following NuBus cards:
.Bl -bullet -offset indent -compact
.It
Apple LC Twisted-pair (part #820-0532-A) PDS card
.It
Cayman Gatorcard PDS
.It
Dayna DaynaPort/E30
.El
.Pp
In addition, the
.Nm
interface supports the following interfaces:
.Bl -bullet -offset indent -compact
.It
on-board Ethernet for non-AV Quadras
.It
on-board Ethernet for 500-series PowerBooks
.It
Apple CS Ethernet Twisted-pair card for Comm Slot found on
LC575, Quadra 630, LC630, and Performa 580.
.El
.Sh DIAGNOSTICS
.Bl -diag -compact
.It sn%d: transmit FIFO underrun
.It sn%d: receive FIFO overrun
.It sn%d: receive buffer exceeded
.It sn%d: receive buffers exhausted
.It sn%d: receive descriptors exhausted
These messages indicate that the interface gets errors
(due to heavy load etc.) and reinitialized.
.El
.Sh SEE ALSO
.Xr arp 4 ,
.Xr inet 4 ,
.Xr netintro 4 ,
.Xr ifconfig 8
.Sh HISTORY
The
.Nm
interface for mac68k, which was derived from a driver for old
.Nx Ns /pica
port, first appeared in
.Nx 1.3 .
.Pp
Jason Thorpe has rewritten a new machine independent SONIC driver which uses
.Xr bus_dma 9
and
.Xr bus_space 9
APIs after
.Nx 1.5
release, and
.Nx Ns /arc
has been switched to using the machine independent (MI) driver.
.Pp
.Nx Ns /mac68k
has also been switched to using the MI driver after the
.Nx 4.0
release.