35-38 Vol. 3C
MODEL-SPECIFIC REGISTERS (MSRS)
81FH
2079
IA32_X2APIC_TMR7
x2APIC Trigger Mode Register Bits
255:224 (R/O)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
820H
2080
IA32_X2APIC_IRR0
x2APIC Interrupt Request Register Bits
31:0 (R/O)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
821H
2081
IA32_X2APIC_IRR1
x2APIC Interrupt Request Register Bits
63:32 (R/O)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
822H
2082
IA32_X2APIC_IRR2
x2APIC Interrupt Request Register Bits
95:64 (R/O)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
823H
2083
IA32_X2APIC_IRR3
x2APIC Interrupt Request Register Bits
127:96 (R/O)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
824H
2084
IA32_X2APIC_IRR4
x2APIC Interrupt Request Register Bits
159:128 (R/O)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
825H
2085
IA32_X2APIC_IRR5
x2APIC Interrupt Request Register Bits
191:160 (R/O)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
826H
2086
IA32_X2APIC_IRR6
x2APIC Interrupt Request Register Bits
223:192 (R/O)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
827H
2087
IA32_X2APIC_IRR7
x2APIC Interrupt Request Register Bits
255:224 (R/O)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
828H
2088
IA32_X2APIC_ESR
x2APIC Error Status Register (R/W)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
82FH
2095
IA32_X2APIC_LVT_CMCI
x2APIC LVT Corrected Machine Check
Interrupt Register (R/W)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
830H
2096
IA32_X2APIC_ICR
x2APIC Interrupt Command Register
(R/W)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
832H
2098
IA32_X2APIC_LVT_TIMER
x2APIC LVT Timer Interrupt Register
(R/W)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
833H
2099
IA32_X2APIC_LVT_THERMAL
x2APIC LVT Thermal Sensor Interrupt
Register (R/W)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
834H
2100
IA32_X2APIC_LVT_PMI
x2APIC LVT Performance Monitor
Interrupt Register (R/W)
If CPUID.01H:ECX.[21] = 1
&& IA32_APIC_BASE.[10]
= 1
Table 35-2. IA-32 Architectural MSRs (Contd.)
Register
Address
Architectural MSR Name and bit
fields
(Former MSR Name)
MSR/Bit Description
Comment
Hex
Decimal