VT82C686B

Manufacturer Part NumberVT82C686B
ManufacturerETC-unknow
VT82C686B datasheet
 


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Memory Mapped I/O APIC Registers
Memory Address FEC00000 – APIC Index .................... RW
7-0
APIC Index .......................................... default = 00h
8-bit pointer to APIC registers.
Memory Address FEC00013-10 – APIC 32-bit Data ..... RW
31-0 APIC 32-bit Data .................... default = 0000 0000h
Data for the APIC register pointed to by the APIC
index
Memory Address FEC00020 – APIC IRQ Pin Assertion WO
7-5
Reserved
........................................ always reads 0
4-0
APIC IRQ Number ........................default undefined
IRQ # for this interrupt. Valid values are 0-23 only.
Memory Address FEC00040 – APIC EOI ..................... WO
Redirection Entry Clear ................default undefined
7-0
When a write is issued to this register, the APIC will
check this field and compare it with the vector field
for each entry in the I/O redirection table. When a
match is found, the “Remote_IRR” bit for that I/O
Redirection Entry will be cleared.
Revision 1.71 June 9, 2000
Indexed I/O APIC 32-Bit Registers
Offset 0 – APIC Identification (0000 0000h) .................. RW
31-28 Reserved
........................................always reads 0
27-24 APIC Identification ..................................default = 0
Software must program this value before using the
APIC.
........................................always reads 0
23-0 Reserved
Offset 1 – APIC Version (0017 0011h) ............................. RO
.................................... always reads 00h
31-24 Reserved
23-16 Maximum Redirection ................... always reads 17h
Equal to the number of APIC interrupt pins minus
one. For this APIC, this value is 17h (23 decimal).
15-8 Reserved
.................................... always reads 00h
APIC Version.................................. always reads 11h
7-0
The implementation version for this APIC is 11h.
Offset 2 – APIC Arbitration (0000 0000h) ...................... RO
31-28 Reserved
.................................... always reads 00h
27-24 APIC Arbitration ID ...................... always reads 00h
23-0 Reserved
.................................... always reads 00h
-115-
Function 5 & 6 Registers - AC97 Audio & Modem Codecs
VT82C686B

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