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3C575_CB(4)									      3C575_CB(4)

       3c575_cb - 3Com 3c575 Etherlink XL 10/100 CardBus device driver

       insmod	3c575_cb.o  [debug=n]  [rx_copybreak=n]  [max_interrupt_work=n]  [use_hw_csums=n]
       [down_poll_rate=n] [auto_polarity=n]

       3c575_cb is the low-level Card Services driver for the 3Com  3c575  EtherLink  XL  CardBus
       series  ethernet  adapters.  When this driver is attached to a card, it allocates the next
       available ethernet device (eth0..eth#).	This information for this card will  be  reported
       in the kernel log file, and the device name passed on to cardmgr(8).

       The driver uses the N-Way autonegotiating transceiver to negotiate the speed and duplex of
       the network link.  If the link partner does not support negotiation only the link speed is

       If  the	on-card EEPROM is programmed for a full-duplex (FD) link, only FD media types are
       advertised and the link is assumed to be full-duplex.

	      Set the breakpoint for copying incoming frames into reduced-sized  packet  buffers.
	      The default value of 200 bytes is reasonable for most systems.

	      This option selects the maximum amount of work handled during each interrupt.  Each
	      received packet counts as one unit of work, as does  updating  statistics  counters
	      and  handling  errors.  The default value of 32 should only need to be increased on
	      very slow machines.  An occasional "too much work in interrupt" message  is  not	a

	      Controls	use  of  an  adapter's on-board TCP/IP checksum verification for incoming
	      packets.	This is on by default; setting to 0 disables hardware checksums.  It  may
	      be  useful  to disable hardware checksums if it is suspected that something is cor-
	      rupting data on its way from the card to the CPU.

	      For Cyclone and Tornado chipsets, this is the rate at  which  the  card  polls  the
	      transmit	ring for new packets.  The value is in units of 320 ns; a value of 0 dis-
	      ables polling.  The default is 20 (6.4 us), and the maximum allowed value  is  127.
	      Polling  is  more  efficient  but can consume a significant amount of PCI bus band-

       This flag can be used to control the transceiver's auto polarity
	      detection capability.  Some Cisco Catalyst switches are  known  to  interact  badly
	      with this feature in 10baseT mode.  It defaults to 1 (enabled).

       This driver: Donald Becker - becker@scyld.com

       Linux PC Card control software: David Hinds - dahinds@users.sourceforge.net et al.

       cardmgr(8), pcmcia(5).

pcmcia-cs			       2001/06/22 01:12:38			      3C575_CB(4)
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