Technical information

7-86
AIC-6915 Ethernet LAN Controller Programmer’s Manual
Note:
Due to the limitation of the SRAM size, Receive Multicast, Broadcast, and
VLAN packets are counted by software for RMON usage.
6Ch Receive Packets 128
to 255 Bytes
MAC
(RX)
RMON 32 Count the number of receive
frames whose length is
between 128 and 255 bytes.
70h Receive Packets 256
to 511 Bytes
MAC
(RX)
RMON 32 Count the number of receive
frames whose length is
between 256 and 511 bytes.
74h Receive Packets 512
to 1023 Bytes
MAC
(RX)
RMON 32 Count the number of receive
frames whose length is
between 512 and 1023 bytes.
78h Receive Packets 1024
to 1518 Bytes
MAC
(RX)
RMON 32 Count the number of receive
frames whose length is
between 1024 and 1518 bytes.
7Ch Frames Lost Due to
Internal Receive
Errors. (Fifo
Overflow Or No
Descriptor.)
RX R 32 Count the number of frame
discarded by receive engine
due to FIFO overflow or no
descriptor.
80h Transmit Fifo
Underflow Counts.
TX O 16 Count the number of frames
which encounter a FIFO
underflow during
transmission.
Note
: This counter is used for
internal debugging purposes
only and is not a real counter
for Network Management.
Table 7-109. MAC Statistic Register (Continued)
Byte
Addr Statistics Source Priority Bits Descriptions