4-52
Service Manual PRELIMINARY
Table 4-9 Decoding Commands (continued)
5 4
MC_C
MD
3 2 1 0
CMD
in
Hex
MC_
ADR
<39>
Description
No B-
Cache
CPU
B-
Cache
CPU
IOD
x x
1 0 1 0
X A
0
Read Mod0 -
Mem
Y
Y
Y
x x
1 0 1 0
X A
1
Read Peer0 - I/O
Y
x x
1 0 1 1
X B
0
Read Mod1 -
Mem
Y
Y
Y
x x
1 0 1 1
X B
1
Read Peer1 - I/O
Y
1 0
1 1 0 0
2 C
1
FILL0 (due to
Read0/Peer0)
Y
1 0
1 1 0 1
2 D
1
FILL1 (due to
Read1/Peer1)
Y
x x
1 1 1 0
X E
0
Read0 - Mem
Y
Y
x x
1 1 1 1
X F
0
Read1 - Mem
Y
Y
4.4.11
Node IDs
The node ID is a six-bit field in the command address (bits<38:33>). The high-order
three bits are always set, and the last three indicate the node. Bit-to-text translations
give six-bit data, although only the last three bits define the node.
Table 4-10 Node IDs
Node ID <2:0>
Six Bit (Hex)
Node (1200)
0 0 0
38
0 0 1
39
Memory
0 1 0
3A
CPU0
0 1 1
3B
CPU1
1 0 0
3C
IOD0
1 0 1
3D
IOD1
1 1 0
NA
NA
1 1 1
NA
NA
