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

# cx(4)

driver for synchronous/asynchronous Cronyx Sigma WAN adapters

## NAME

**cx** – driver for synchronous/asynchronous Cronyx Sigma WAN adapters

## SYNOPSIS

To compile support for the

**cx** driver into your kernel, place the following line in your kernel configuration file:

**device cx**

Pp Alternatively, to load the

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

```
if_cx_load="YES"
```

Additional options: **device sppp** **options NETGRAPH** **options NETGRAPH\_CRONYX**

In */boot/device.hints*: **hint.cx.0.at="isa"** **hint.cx.0.port="0x240"** **hint.cx.0.irq="15"** **hint.cx.0.drq="7"**

## DESCRIPTION

The **cx** driver needs either [sppp(4)](/sppp/4.md) or [netgraph(4)](/netgraph/4.md). Which one to use is determined by the NETGRAPH\_CRONYX option. If this option is present in your kernel configuration file, the **cx** driver will be compiled with [netgraph(4)](/netgraph/4.md) support. Otherwise, it will be compiled with [sppp(4)](/sppp/4.md) support.

The base I/O port address specified in */boot/device.hints* must match the port address set by the jumpers on the board. The DMA I/O channel and interrupt request numbers are configured by software at adapter initialization. Legal values are:

- Port:

  0x240, 0x260, 0x280, 0x300, 0x320, 0x380

- IRQ:

  3, 5, 7, 10, 11, 12, 15

- DMA:

  5, 6, 7

The **cx** driver supports autodetection. As for all non-PNP hardware, using autodetection could lead to some potential problems with other devices during the hardware detection process. It is always better to specify hardware resources manually.

Refer to sconfig(8) for information about the **cx** adapter configuration.

## HARDWARE

The **cx** driver supports the following cards:

- Cronyx Sigma-22, Sigma-24

- Cronyx Sigma-100

- Cronyx Sigma-400, Sigma-401, Sigma-404, Sigma-410, Sigma-440

- Cronyx Sigma-500

- Cronyx Sigma-703

- Cronyx Sigma-800, Sigma-801, Sigma-810, Sigma-840

## SEE ALSO

[cp(4)](/cp/4.md), [ctau(4)](/ctau/4.md), [sppp(4)](/sppp/4.md), [ifconfig(8)](/ifconfig/8.md), sconfig(8), spppcontrol(8)

## HISTORY

The **cx** driver was updated in FreeBSD 5.2 and FreeBSD 4.10. In most of the previous versions of FreeBSD the **cx** driver is out of date. The **cx** driver for previous versions of FreeBSD is available from *http://www.cronyx.ru/*.