AMD
54
Am79C90
Table A-1 “Mapping of Logical Address to Filter Mask”
can be used to find a multicast address that maps into a
particular address filter bit. For example, address BB 00
00 00 00 00 maps into bit 15. Therefore, any node that
has bit 15 set in its logical address filter register will re-
ceive all packets addressed to BB 00 00 00 00 00. The
table also shows that bit 15 is located in bit 7 of byte 1 of
the Logical Address Filter Register.
Addresses in this table are shown in the standard Ether-
net format. The leftmost byte is the first byte to appear
on the network with the least significant bit appearing
first.
Table A-1. Mapping of Logical Address to Filter Mask
Byte
Pos
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
Bit
Pos
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
LAF
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Destination
Address Accepted
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
EB 00
00
CB 00
00
8B
00
00
BB 00
00
C7
00
00
E7
00
00
A7
00
00
87
00
00
07
00
00
27
00
00
67
00
00
47
00
00
69
00
00
49
00
00
09
00
00
29
00
00
A9
00
00
89
00
00
C9
00
00
E9
00
00
Byte
Pos
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
6
6
6
6
6
6
6
6
7
7
7
7
7
7
7
7
Bit
Pos
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
LAF
Bit
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
Destination
Address Accepted
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
CF 00
00
4F
00
00
6F
00
00
2F
00
00
0F
00
00
63
00
00
43
00
00
03
00
00
23
00
00
A3
00
00
83
00
00
C3
00
00
E3
00
00
CD 00
00
ED 00
00
AD 00
00
8D
00
00
0D
00
00
2D
00
00
6D
00
00
4D
00
00
85
A5
E5
C5
45
65
25
05
2B
0B
4B
6B
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
E1
C1
A1
8F
BF
EF
21
01
41
71
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
81