SN(4) | Device Drivers Manual | SN(4)

# NAME

`sn` —
National Semiconductor DP83932 (SONIC) based Ethernet device driver

# SYNOPSIS

## arc

`sn0 at jazzio?`

## mac68k

`sn* at obio?`
`sn* at nubus?`

# DESCRIPTION

The `sn` interface provides access to a 10 Mb/s Ethernet network via the National Semiconductor DP83932 (SONIC) Ethernet chip set.

Each of the host's network addresses is specified at boot time with an `SIOCSIFADDR` ioctl(2). The `sn` interface employs the address resolution protocol described in arp(4) to dynamically map between Internet and Ethernet addresses on the local network.

# HARDWARE

## arc

The `sn` driver supports on-board JAZZ based SONIC interfaces found on Acer PICA and NEC machines.

## mac68k

The `sn` driver is currently known to support the following NuBus cards:

- Apple LC Twisted-pair (part #820-0532-A) PDS card
- Cayman Gatorcard PDS
- Dayna DaynaPort/E30

In addition, the `sn` interface supports the following interfaces:

- on-board Ethernet for non-AV Quadras
- on-board Ethernet for 500-series PowerBooks
- Apple CS Ethernet Twisted-pair card for Comm Slot found on LC575, Quadra 630, LC630, and Performa 580.

# DIAGNOSTICS

sn%d: transmit FIFO underrun
sn%d: receive FIFO overrun
sn%d: receive buffer exceeded
sn%d: receive buffers exhausted
sn%d: receive descriptors exhausted
  These messages indicate that the interface gets errors (due to heavy load etc.) and reinitialized.

# SEE ALSO

arp(4), inet(4), netintro(4), ifconfig(8)

# HISTORY

The `sn` interface for mac68k, which was derived from a driver for old NetBSD/pica port, first appeared in NetBSD 1.3.

Jason Thorpe has rewritten a new machine independent SONIC driver which uses bus_dma(9) and bus_space(9) APIs after NetBSD 1.5 release, and NetBSD/arc has been switched to using the machine independent (MI) driver.

NetBSD/mac68k has also been switched to using the MI driver after the NetBSD 4.0 release.

May 16, 2009 | NetBSD 10.1