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Intel 8255x 10/100 Mbps Ethernet Controller Family Open Source Software Developer Manual 67
Host Software Interface
Table 42. 82557 Dual-Port FIFO Settings - Receive
Configuration Value (Nibble Wide) Receive FIFO Limit
Binary (Receive Bits 3:0) Dwords Bytes
0 0 0 0 16 64
0 0 0 1 15 60
0 0 1 0 14 56
0 0 1 1 13 52
0 1 0 0 12 48
0 1 0 1 11 44
0 1 1 0 10 40
0 1 1 1 9 36
1 0 0 0 8 32
a
a. This line represents the default values.
1 0 0 1 7 28
1 0 1 0 6 24
1 0 1 1 5 20
1 1 0 0 4 16
1 1 0 1 3 12
1 1 1 0 2 8
1 1 1 1 1 4
Table 43. 82558 and 82559 Dual-Port FIFO Settings - Transmit
Configuration Value Transmit FIFO Limit
Binary (Transmit Bits 6:4) Dwords Bytes
0 0 0 0 0
a
a. This line represents the default values.
0 0 1 1 4
0 1 0 2 8
0 1 1 3 12
1 0 0 4 16
1 0 1 5 20
1 1 0 6 24
1 1 1 7 28