MOS(4) | Device Drivers Manual | MOS(4)

# NAME

`mos` — MosChip MCS7730/7830/7832 10/100 USB Ethernet device

# SYNOPSIS

`mos* at uhub?`

# DESCRIPTION

The `mos` driver provides support for USB Ethernet adapters based on the MosChip MCS7730, MCS7830 and MCS7832 USB 2.0 chipsets, including the following:

Delock 61147
Sitecom LN-030
Syba SY-U2LAN

All adapters operate with either USB 1.x or USB 2.0 controllers, though performance with 1.x controllers is limited since the USB 1.x standard specifies a maximum transfer speed of 12Mbps. Users with USB 1.x controllers should therefore not expect to actually achieve 100Mbps speeds with these devices.

A 64-bit multicast hash table is supported, single perfect filter entry for the station address, all-multicast mode, and promiscuous mode. Packets are received and transmitted over separate USB bulk transfer endpoints.

The `mos` driver supports the following media types:

autoselect
  Enable autoselection of the media type and options (this is the default). The user can manually override the autoselected mode by adding media options to the appropriate hostname.if(5) file.
10baseT
  Set 10Mbps operation.
100baseTX
  Set 100Mbps (Fast Ethernet) operation.

The `mos` driver supports the following media options:

full-duplex
  Force full-duplex operation.
half-duplex
  Force half-duplex operation.

For more information on configuring this device, see ifconfig(8).

# DIAGNOSTICS

mos0: watchdog timeout
  A packet was queued for transmission and a transmit command was issued, however the device failed to acknowledge the transmission before a timeout expired.
mos0: no memory for rx list
  The driver failed to allocate an mbuf for the receiver ring.

# SEE ALSO

arp(4), ifmedia(4), intro(4), netintro(4), usb(4), hostname.if(5), ifconfig(8)

MosChip India, https://moschip.com.

# HISTORY

The `mos` device driver first appeared in OpenBSD 4.5.

# AUTHORS

The `mos` driver was written by Johann Christian Rode <jcrode@gmx.net>.

February 18, 2022 | Debian