FW82801DBM S L6DN Intel, FW82801DBM S L6DN Datasheet - Page 126
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FW82801DBM S L6DN
Manufacturer Part Number
FW82801DBM S L6DN
Description
Manufacturer
Intel
Datasheet
1.FW82801DBM_S_L6DN.pdf
(615 pages)
Specifications of FW82801DBM S L6DN
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Functional Description
126
Table 5-24. Remote Read Message
Remote Read Message
Remote read message is used when a local APIC wishes to read the register in another local APIC.
The I/O APIC in the ICH4 neither generates or responds to this cycle. The message format is same
as short message for the first 21 cycles.
NOTE: Cycle 21 through 36 contain the remote register data. The status information in cycle 37 specifies if the
Cycle
2–5
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
11
1
6
7
8
9
data is good or not. Remote read cycle is always successful (although the data may be valid or invalid)
in that it is never retried. The reason for this is that Remote Read is a debug feature, and a "hung"
remote APIC that is unable to respond should not cause the debugger to hang.
NOT(DM)
NOT(M1)
NOT(D7)
NOT(D5)
NOT(D3)
NOT(D1)
NOT(C1)
NOT(V7)
NOT(V5)
NOT(V3)
NOT(V1)
NOT(A1)
NOT(L)
NOT(A)
ARBID
Bit 1
d31
d29
d27
d25
d23
d21
d19
d17
d15
d13
d09
d07
d05
d03
d01
d11
S
C
1
1
1
NOT(TM)
NOT(M2)
NOT(M0)
NOT(D6)
NOT(D4)
NOT(D2)
NOT(D0)
NOT(C0)
NOT(V6)
NOT(V4)
NOT(V2)
NOT(V0)
NOT(A1)
NOT(A)
Bit 0
d30
d28
d26
d24
d22
d20
d18
d16
d14
d12
d10
d08
d06
d04
d02
d00
S
C
0
1
1
1
Normal Arbitration
Arbitration ID
DM = Destination Mode from bit 11 of the redirection table register
M2-M0 = Delivery Mode from bits 10:8 of the redirection table
register
L = Level, TM = Trigger Mode
Interrupt vector bits V7–V0 from redirection table register
Destination field from bits 63:56 of redirection table register
Checksum for Cycles 6–16
Postamble
Status Cycle 0.
Status Cycle 1.
Remote register data 31-0
Data Status: 00 = valid, 11 = invalid
Check Sum for data d31-d00
Idle
Intel
Comments
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82801DBM ICH4-M Datasheet
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