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82379AB Datasheet(PDF) 28 Page - Intel Corporation

Part # 82379AB
Description  SYSTEM I/O APIC(SIO.A) AND
Download  137 Pages
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Manufacturer  INTEL [Intel Corporation]
Direct Link  http://www.intel.com
Logo INTEL - Intel Corporation

82379AB Datasheet(HTML) 28 Page - Intel Corporation

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82378ZB (SIO) AND 82379AB (SIO.A)
28
Configuration
Offset
Register
Register
Access
Bus Access
A8h
Fast-Off Timer (FTMR)
R/W
PCI Only
A9h
Reserved
--
PCI Only
AAh - ABh
SMI Request (SMIREQ)
R/W
PCI Only
ACh
Clock Throttle STPCLK# Low Timer (CTLTMRL)
R/W
PCI Only
ADh
Reserved
--
PCI Only
AEh
Clock Throttle STPCLK# High Timer (CTLTMRH)
R/W
PCI Only
AF
−FFh
Reserved
--
PCI Only
Table 4. ISA-Compatible Registers
Address
Address
Type
Name
Block
FEDC BA98
7654
3210
0000h
0000
0000
000x
0000
r/w
DMA1 CH0 Base and Current Address
DMA
0001h
0000
0000
000x
0001
r/w
DMA1 CH0 Base and Current Count
DMA
0002h
0000
0000
000x
0010
r/w
DMA1 CH1 Base and Current Address
DMA
0003h
0000
0000
000x
0011
r/w
DMA1 CH1 Base and Current Count
DMA
0004h
0000
0000
000x
0100
r/w
DMA1 CH2 Base and Current Address
DMA
0005h
0000
0000
000x
0101
r/w
DMA1 CH2 Base and Current Count
DMA
0006h
0000
0000
000x
0110
r/w
DMA1 CH3 Base and Current Address
DMA
0007h
0000
0000
000x
0111
r/w
DMA1 CH3 Base and Current Count
DMA
0008h
0000
0000
000x
1000
r/w
DMA1 Status(r) Command(w) Register
DMA
0009h
0000
0000
000x
1001
wo
DMA1 Write Request Register
DMA
000Ah
0000
0000
000x
1010
wo
DMA1 Write Single Mask Bit
DMA
000Bh
0000
0000
000x
1011
wo
DMA1 Write Mode Register
DMA
000Ch
0000
0000
000x
1100
wo
DMA1 Clear Byte Pointer
DMA
000Dh
0000
0000
000x
1101
wo
DMA1 Master Clear
DMA
000Eh
0000
0000
000x
1110
wo
DMA1 Clear Mask Register
DMA
000Fh
0000
0000
000x
1111
r/w
DMA1 Read/Write All Mask Register Bits
DMA
0020h
0000
0000
001x
xx00
r/w
INT 1 Control Register
PIC
0021h
0000
0000
001x
xx01
r/w
INT 1 Mask Register
PIC
0040h
0000
0000
010x
0000
r/w
Timer Counter 1 - Counter 0 Count
TC
0041h
0000
0000
010x
0001
r/w
Timer Counter 1 - Counter 1 Count
TC


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