FW82801ER S L742 Intel, FW82801ER S L742 Datasheet - Page 363
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FW82801ER S L742
Manufacturer Part Number
FW82801ER S L742
Description
Manufacturer
Intel
Datasheet
1.FW82801ER_S_L742.pdf
(671 pages)
Specifications of FW82801ER S L742
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9.5
9.5.1
9.5.2
.
Intel
®
Table 144. APIC Direct Registers (LPC I/F—D31:F0)
Table 145. APIC Indirect Registers (LPC I/F—D31:F0)
82801EB ICH5 / 82801ER ICH5R Datasheet
Advanced Interrupt Controller (APIC)(D31:F0)
APIC Register Map
(LPC I/F—D31:F0)
The APIC is accessed via an indirect addressing scheme. Two registers are visible by software for
manipulation of most of the APIC registers. These registers are mapped into memory space. The
registers are shown in
accessing these registers, accesses must be done a DWord at a time. For example, software should
never access byte 2 from the Data register before accessing bytes 0 and 1. The hardware will not
attempt to recover from a bad programming model in this case.
IND—Index Register
(LPC I/F—D31:F0)
Memory Address
Default Value:
The Index Register will select which APIC indirect register to be manipulated by software. The
selector values for the indirect registers are listed in
to select the desired APIC internal register.
Table 145
FECO_0020h
FECO_0040h
FEC0_0000h
FEC0_0010h
Bit
7:0
Address
3E–3F
02–0F
40–FF
10–11
12–13
Index
00
01
...
APIC Index — R/W. This is an 8-bit pointer into the I/O APIC register table.
lists the registers which can be accessed within the APIC via the Index Register. When
REDIR_TBL23
Mnemonic
REDIR_TBL0
REDIR_TBL1
Mnemonic
IRQPA
FEC0_0000h
00h
EOIR
DAT
IND
VER
Table
ID
—
—
...
144.
Index
Data
IRQ Pin Assertion
EOI
Identification
Version
Reserved
Redirection Table 0
Redirection Table 1
...
Redirection Table 23
Reserved
Register Name
Register Name
Description
LPC Interface Bridge Registers (D31:F0)
Attribute:
Size:
Table
145. Software will program this register
R/W
8 bits
32 bits
32 bits
32 bits
8 bits
Size
32 bits
32 bits
64 bits
64 bits
64 bits
Size
—
—
...
R/W, RO
R/W, RO
R/W, RO
Type
R/W
R/W
WO
WO
Type
R/W
RO
RO
RO
...
363
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