82801BA Datasheet, PDF (247/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

LAN Controller Registers (B1:D8:F0)
Table 7-6. Statistical Counters
ID
Counter
Description
28
Transmit Multiple
Collisions
This counter contains the number of transmitted frames that encountered
more than one collision.
32
Transmit Total
Collisions
This counter contains the total number of collisions that were encountered
while attempting to transmit. This count includes late collisions and frames
that encountered MAXCOL.
36
Receive Good
Frames
This counter contains the number of frames that were received properly from
the link. It is updated only after the actual reception from the link is completed
and all the data bytes are stored in memory.
This counter contains the number of aligned frames discarded because of a
40
Receive CRC Errors
CRC error. This counter is updated, if needed, regardless of the Receive Unit
state. The Receive CRC Errors counter is mutually exclusive of the Receive
Alignment Errors and Receive Short Frame Errors counters.
This counter contains the number of frames that are both misaligned (for
44
Receive Alignment
Errors
example, CRS deasserts on a non-octal boundary) and contain a CRC error.
The counter is updated, if needed, regardless of the Receive Unit state. The
Receive Alignment Errors counter is mutually exclusive of the Receive CRC
Errors and Receive Short Frame Errors counters.
This counter contains the number of good frames discarded due to
unavailability of resources. Frames intended for a host whose Receive Unit is
48
Receive Resource
Errors
in the No Resources state fall into this category. If the LAN Controller is
configured to Save Bad Frames and the status of the received frame
indicates that it is a bad frame, the Receive Resource Errors counter is not
updated.
52
Receive Overrun
Errors
This counter contains the number of frames known to be lost because the
local system bus was not available. If the traffic problem persists for more
than one frame, the frames that follow the first are also lost; however,
because there is no lost frame indicator, they are not counted.
56
Receive Collision
Detect (CDT)
This counter contains the number of frames that encountered collisions
during frame reception.
60
Receive Short
Frame Errors
This counter contains the number of received frames that are shorter than
the minimum frame length. The Receive Short Frame Errors counter is
mutually exclusive to the Receive Alignment Errors and Receive CRC Errors
counters. A short frame will always increment only the Receive Short Frame
Errors counter.
64
Flow Control
Transmit Pause
This counter contains the number of Flow Control frames transmitted by the
LAN Controller. This count includes both the Xoff frames transmitted and Xon
(PAUSE(0)) frames transmitted.
68
Flow Control
Receive Pause
This counter contains the number of Flow Control frames received by the
LAN Controller. This count includes both the Xoff frames received and Xon
(PAUSE(0)) frames received.
Flow Control
72 Receive
Unsupported
This counter contains the number of MAC Control frames received by the
LAN Controller that are not Flow Control Pause frames. These frames are
valid MAC control frames that have the predefined MAC control Type value
and a valid address but has an unsupported opcode.
76
Receive TCO
Frames
This counter contains the number of TCO packets received by the LAN
Controller.
78
Transmit TCO
Frames
This counter contains the number of TCO packets transmitted.
82801BA ICH2 and 82801BAM ICH2-M Datasheet
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