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TXP(4)			  OpenBSD Programmer's Manual			TXP(4)

NAME
     txp - 3Com 3XP Typhoon/Sidewinder (3CR990) 10/100 Ethernet device

SYNOPSIS
     txp* at pci?

DESCRIPTION
     The txp driver provides support for the 3Com Typhoon/Sidewinder Fast
     Ethernet chipset, including the following:

	   o   3Com 3CR990-TX-95
	   o   3Com 3CR990-TX-97
	   o   3Com 3CR990SVR95
	   o   3Com 3CR990SVR97

     The txp driver supports IPv4 receive IP/TCP/UDP checksum offload, IPv4
     transmit IP checksum offload, and VLAN tag insertion and stripping.

     The txp driver supports the following media types:

     autoselect
		Enable autoselection of the media type and options.  The user
		can manually override the autoselected mode by adding media
		options to the appropriate hostname.if(5) file.

     10baseT	Set 10Mbps operation.  The ifconfig(8) mediaopt option can
		also be used to select either full-duplex or half-duplex
		modes.

     100baseTX	Set 100Mbps (Fast Ethernet) operation.	The ifconfig(8)
		mediaopt option can also be used to select either full-duplex
		or half-duplex modes.

     The txp 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).

FILES
     The driver needs a firmware file, which is loaded on demand when the
     device is attached:

	   /etc/firmware/3c990

SEE ALSO
     arp(4), ifmedia(4), intro(4), netintro(4), pci(4), hostname.if(5),
     ifconfig(8)

HISTORY
     The txp driver first appeared in OpenBSD 2.9.

OpenBSD 4.9		       October 28, 2008			   OpenBSD 4.9

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