EBPHY(4) BSD Programmer's Manual EBPHY(4)NAME
EBPHY - Physical layer (PHY) driver on 3C905B ASIC
SYNOPSIS
ebphy* at eb? phy ?
DESCRIPTION
The ebphy driver supports the PHYceiver built into the 3C905B ASIC for
10baseT and 100baseTX Ethernet. This device driver is called upon by net-
work device drivers; no direct administrative control is provided.
The ifconfig(8) command in conjunction with the device driver making us-
ing of this drivers services provides an administrative interface that
allows various physical level parameters (such as duplex, speed, and
loopback) to be controlled.
The 3C905B supports NWay automatic speed and duplex negotiation as well
as automatic speed detection for hubs that do not support the NWay FLP
protocol (both methods are defined by the IEEE 802.3u standard).
BUGS
The ebphy MII ID is {0,0}. This is legal, but it allows false recognition
when used in bad kernel configuration files in combination with other
PHYs that don't have a unique identifier.
SEE ALSOifconfig(8), eb(4)4th Berkeley Distribution December 9, 1997 1