82801BA Datasheet, PDF (481/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

I/O Register Index
Table A-1. ICH2 Fixed I/O Registers (Continued)
Register Name
Port
EDS Section and Location
Aliased at 70h–71h
74h–75h
Aliased if U128E bit in RTC Configuration Register is
enabled
Section 9.1.24, “RTC_CONF—RTC Configuration
Register (LPC I/F—D31:F0)” on page 9-14
Aliased at 72h–73h or 70h–71h
76h–77h
Aliased to 70h–71h if U128E bit in RTC Configuration
Register is enabled
Section 9.1.24, “RTC_CONF—RTC Configuration
Register (LPC I/F—D31:F0)” on page 9-14
Channel 2 DMA Memory Low Page
Register
81h
Section 9.2.3, “DMAMEM_LP—DMA Memory Low Page
Registers” on page 9-25
Channel 3 DMA Memory Low Page
Register
82h
Section 9.2.3, “DMAMEM_LP—DMA Memory Low Page
Registers” on page 9-25
Channel 1 DMA Memory Low Page
Register
Reserved Page Registers
Channel 0 DMA Memory Low Page
Register
83h
84h–86h
87h
Section 9.2.3, “DMAMEM_LP—DMA Memory Low Page
Registers” on page 9-25
Section 9.2.3, “DMAMEM_LP—DMA Memory Low Page
Registers” on page 9-25
Reserved Page Register
88h
Channel 6 DMA Memory Low Page
Register
Channel 7 DMA Memory Low Page
Register
89h
Section 9.2.3, “DMAMEM_LP—DMA Memory Low Page
Registers” on page 9-25
8Ah
Section 9.2.3, “DMAMEM_LP—DMA Memory Low Page
Registers” on page 9-25
Channel 5 DMA Memory Low Page
Register
8Bh
Section 9.2.3, “DMAMEM_LP—DMA Memory Low Page
Registers” on page 9-25
Reserved Page Registers
8Ch–8Eh
Refresh Low Page Register
Aliased at 81h–8Fh
8Fh
91h–9Fh
(except 92h)
Fast A20 and INIT Register
92h
Section 9.7.3, “PORT92—Fast A20 and Init Register” on
page 9-52
Slave PIC ICW1 Init. Cmd Word 1
Register
Slave PIC OCW2 Op Ctrl Word 2
Register
Slave PIC OCW3 Op Ctrl Word 3
Register
Section 9.4.2, “ICW1—Initialization Command Word 1
Register” on page 9-34
A0h
Section 9.4.8, “OCW2—Operational Control Word 2
Register” on page 9-37
Section 9.4.9, “OCW3—Operational Control Word 3
Register” on page 9-38
Slave PIC ICW2 Init. Cmd Word 2
Register
Slave PIC ICW3 Init. Cmd Word 3
Register
Slave PIC ICW4 Init. Cmd Word 4
Register
Slave PIC OCW1 Op Ctrl Word 1
Register
Section 9.4.3, “ICW2—Initialization Command Word 2
Register” on page 9-35
Section 9.4.4, “ICW3—Master Controller Initialization
Command Word 3 Register” on page 9-35
A1
Section 9.4.6, “ICW4—Initialization Command Word 4
Register” on page 9-36
Section 9.4.7, “OCW1—Operational Control Word 1
(Interrupt Mask) Register” on page 9-36
Aliased at A0h–A1h
A4h–A5h
Aliased at A0h–A1h
A8h–A9h
Aliased at A0h–A1h
ACh–ADh
Aliased at A0h–A1h
B0h–B1h
82801BA ICH2 and 82801BAM ICH2-M Datasheet
A-3