---
name: "sn"
section: "4"
platform: "linux"
package: "freebsd-manpages"
version: "6.0-5"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/sn/4"
---

# sn(4)

Ethernet driver for SMC91Cxx based cards

## NAME

**sn** – Ethernet driver for SMC91Cxx based cards

## SYNOPSIS

To compile support for the

**sn** driver into your kernel, place the following lines in your kernel configuration file:

**device sn**

Alternatively, to load the

**sn** driver at boot time, place the following line in [loader.conf(5)](/loader.conf/5.md):

```
if_sn_load="YES"
```

## DESCRIPTION

The **sn** device driver supports SMC91Cxx based ISA and PCMCIA cards.

## HARDWARE

The **sn** driver supports SMC91Cxx based ISA and PCMCIA cards including:

- 3Com Megahertz X-Jack Ethernet PC-Card XJ10BT

- 3Com Megahertz X-Jack Ethernet PC-Card XJ10BC

- Farallon EtherMac PC Card 595a

- Motorola Mariner Ethernet/Modem PC Card

- Ositech Seven of Diamonds Ethernet PC Card

- Ositech Jack of Hearts Ethernet/Modem PC Card

- Psion Gold Card Netglobal Ethernet PC Card

- Psion Gold Card Netglobal 10/100 Fast Ethernet PC Card

- Psion Gold Card Netglobal 56k+10Mb Ethernet PC Card

- SMC EZEther PC Card (8020BT)

- SMC EZEther PC Card (8020T)

The **sn** driver supports the SMC 91C90, SMC 91C92, SMC 91C94, SMC 91C95, SMC 91C96, SMC91C100 and SMC 91C100FD chips from SMC.

The Farallon EtherWave and EtherMac card came in two varieties. The [ep(4)](/ep/4.md) driver supports the 595 and 895 cards. These cards have the blue arrow on the front along with a 3Com logo. The Farallon 595a cards, which have a red arrow on the front, are also called EtherWave and EtherMac. They are supported by the **sn** driver.

## SEE ALSO

[ed(4)](/ed/4.md), [ep(4)](/ep/4.md), [ie(4)](/ie/4.md), [intro(4)](/intro/4.md), [ng\_ether(4)](/ng_ether/4.md), [vx(4)](/vx/4.md), [ifconfig(8)](/ifconfig/8.md)

## HISTORY

The **sn** device driver appeared in FreeBSD 4.0.