.\"
.\" Copyright (c) 1994 Herb Peyerl
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"      This product includes software developed by Herb Peyerl
.\" 3. The name of the author may not be used to endorse or promote products
.\"    derived from this software without specific prior written permission
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\"
.\"	$Id: ep.4,v 1.1 1995/10/18 08:44:29 deraadt Exp $
.\"
.Dd February 04, 1993
.Dt EP 4
.Os
.Sh NAME
.Nm ep
.Nd Ethernet driver for 3Com Etherlink III (3c5x9)
.Sh SYNOPSIS
.Cd "ep? at isa? port ? irq ?"
.Sh DESCRIPTION
The
.Nm ep
device driver supports the 3c509 (ISA) and 3c579 (EISA) cards.
Various models of these cards come with a different assortment of
connectors:
.Pp
.Bl -tag -width xxxxxxxxxxxxxxxxxxxx
.It AUI/DIX
Standard 15 pin connector
.It 10Base2
BNC, also known as thin-net
.It 10BaseT
UTP, also known as twisted pair
.El
.Pp
The default port to use is the BNC. To choose an alternate port,
use the following flag combinations with
.Xr ifconfig 8
or in your /etc/hostname.ep? file.
.Pp
.Bl -tag -width xxxxxxxxxxxxxxxxxxxx
.It -link0
Use the BNC port (default).
.It \ link0 -link1
Use the AUI port.
.It \ link0 \ link1
Use the UTP port.
.El
.Pp
If there are multiple cards in the computer, they are searched for
in the following order:
The 3c579 EISA cards are searched for first -- they will be found
in EISA slot# order.
Next, the 3c509 ISA cards are searched -- they are found in increasing
ethernet address order.
This is an example of how they will probe:
.Pp
ep0 at isa0 port 0x6000-0x600f irq 10: aui/bnc address 00:60:8c:70:e5:c5
ep1 at isa0 port 0x300-0x30f irq 3: aui/bnc/utp address 00:20:af:10:62:ab
.Pp
You may specify the port and irq numbers that the cards are expected
to be found at, but it is not necessary.
The cards are sufficiently intelligent to tell us where they
actually live on the ISA bus.
.Pp
.Sh NOTES
The 3c509 card has no jumpers to set the address.
3Com supplies software to set the address of the card in software.
To find the card on the ISA bus, the kernel performs a complex
scan operation at IO address 0x100.
Beware!
Avoid placing other cards at that address!
.Pp
Some models of 3c5x9 have all three connectors on them.
In the case of these cards; you must configure the transceiver type
with the 3Com supplied DOS configuration disk before the link0/link1
flags will operate correctly.
.Pp
.Sh DIAGNOSTICS
ep0: reset (status: %x)
.in +4
the driver has encountered a FIFO underrun or overrun. The driver will reset
the card and the packet will be lost. This is not fatal.
.in -4
ep0: eeprom failed to come ready
.in +4
The eeprom failed to come ready.  This probably means the card is wedged.
.in -4
ep0: 3c509 in test mode. Erase pencil mark!
.in +4
This means that someone has scribbled with pencil in the test area on the
card.  Erase the pencil mark and reboot.  (This is not a joke).
.in -4
.Sh SEE ALSO
.Xr ifconfig 8 ,
.Xr intro 4 ,
.Xr ed 4 ,
.Xr eg 4 ,
.Xr el 4 ,
.Xr ie 4 ,
.Xr le 4
.Sh STANDARDS
are great. There's so many to choose from.