3c90x

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3c90x NIC

This page is about the 3c90x/3c90xB/3c90xC family of ethernet adaptors manufactured by 3com. A number of 3com cards share the programming interface of this family; this includes the 3c556 10/100LAN + 56k Modem MiniPCI adapter (also known as 3CN3AC1556B and 3Com® Megahertz® 10 Mbps LAN CF+ Card) and 3c555 10/100LAN MiniPCI adapters, which support the 3c90xC interface.

The Card

• 3c90x (FastEtherLink XL) is a successor to 3c59x (which are successor to 3c5x9). A new feature introduced in this series is full bus master operation mode with seperate download and upload buffer chains.
• 3c90x support PIO for compability; 3c90xB and 3c90xC do not.
• the adapter can be setup to wake the system upon reception of packets with a programmable filter.
• VLAN support.
• TCP/IP checksum checking support.

Programming considerations

• For 3c555, 3c556, 3c575 and 3c656 cards, the Eeprom Command for "Read" has value 0x230 (and not 0x80 like for 3c90x cards).

Resources

• Etherboot 3c90x driver
• Linux 3c59x driver, driver operation explained at the top of the file
• FreeBSD 3x90x driver
• 3com product details
• 3c90x and 3x90xB NICs technical reference
• http://people.freebsd.org/~wpaul/3Com/README

See Also

• Networking