AM79C976 Advanced Micro Devices, AM79C976 Datasheet - Page 76

• Manufacturer Part Number: AM79C976
• Description: PCnet-PRO 10/100 Mbps PCI Ethernet Controller
• Manufacturer: Advanced Micro Devices

Table 8 describes the statistics counters associated
with the transmitter and lists the MIB objects that these
counters support.
In this table the Offset column gives the offset with re-
spect to the value stored in the read-only MIB Offset
register, which is located at offset 28h in the memory
address space allocated to the Am79C976 device. The
76
Offset (hex)
Offset
(hex)
60
64
4C
5C
48
50
54
58
Transmit Counter Name
XmtUnderrunPkts
RcvPkts128to255Octets
RcvPkts256to511Octets
RcvPkts512to1023Octets
RcvPkts1024to1518Octets
RcvUnsupportedOpcodes
RcvSymbolErrors
Receive Counter Name
XmtOctets
RMON etherStatsDropEvents
RMON etherHistoryDropEvents
MIB-II ifOutDiscards
E-like
dot3StatsInternalMacTranmsitErrors
RMON etherStatsOctets
RMON etherHistoryOctets
RMON hostOutOctets
RMON hostTimeOutOctets
MIB-II IfOutOctets
Table 8. Transmit Statistics Counters
RMON etherStatsPkts128to255Octets
RMON etherStatsPkts256to511Octets
RMON etherStatsPkts512to1023Octets
RMON
etherStatsPkts1024to1518Octets
802.3x an
UnsupportedOpcodesReceived
MIB Object Supported
P R E L I M I N A R Y
MIB Object Supported
Am79C976
actual address of a particular counter is the sum of the
following quantities:
The number of times a packet was dropped
due to transmit FIFO underrun.
The total number of octets of data
transmitted. This does not include the
preamble but does include the FCS bits. The
XmtOctets counter is incremented whenever
the transmitter transmits an octet.
Description of Counter/Comments
The total number of packets (including
error packets) that are 128 bytes to 255
bytes long, inclusive.
The total number of packets (including
error packets) that are 256 bytes to 511
bytes long, inclusive.
The total number of packets (including
error packets) that are 512 bytes to 1023
bytes long, inclusive
The total number of packets (including
error packets) that are 1024 bytes to 1518
(1522 when VLAN set) bytes long,
inclusive.
The total number of valid frames received
with (1) a lengthOrType field value equal to
8808h and (2) an opcode not equal to 1.
The number of times when valid carrier
(CRS) was present and there was at least
one occurrence of an invalid data symbol
(RX_ER). This counter is incremented
only once per valid carrier event (once per
frame), and if a collision is present, this
counter must not be incremented.
Description of Counter/Comments
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