
Register Index
A-10
82801AA and 82801AB Datasheet
Channel 6 DMA Memory Low Page
Register
Channel 7 DMA Memory Low Page
Register
Channel 5 DMA Memory Low Page
Register
Reserved Page Registers
Refresh Low Page Register
89h
Section 8.2.3, “DMAMEM_LP—DMA Memory Low Page
Registers” on page 8-23
Section 8.2.3, “DMAMEM_LP—DMA Memory Low Page
Registers” on page 8-23
Section 8.2.3, “DMAMEM_LP—DMA Memory Low Page
Registers” on page 8-23
8Ah
8Bh
8Ch–8Eh
8Fh
91h–9Fh
(except 92h)
Aliased at 81h
–
8Fh
Fast A20 and INIT Register
92h
Section 8.7.3, “PORT92—Fast A20 and Init Register” on
page 8-50
Section 8.4.2, “ICW1—Initialization Command Word 1
Register” on page 8-33
Section 8.4.8, “OCW2—Operational Control Word 2
Register” on page 8-36
Section 8.4.9, “OCW3—Operational Control Word 3
Register” on page 8-37
Section 8.4.3, “ICW2—Initialization Command Word 2
Register” on page 8-34
Section 8.4.5, “ICW3—Slave Controller Initialization
Command Word 3 Register” on page 8-35
Section 8.4.6, “ICW4—Initialization Command Word 4
Register” on page 8-35
Section 8.4.7, “OCW1—Operational Control Word 1
(Interrupt Mask) Register” on page 8-35
Slave PIC ICW1 Init. Cmd Word 1
Register
Slave PIC OCW2 Op Ctrl Word 2
Register
Slave PIC OCW3 Op Ctrl Word 3
Register
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
Aliased at A0h
–
A1h
Aliased at A0h
–
A1h
Aliased at A0h
–
A1h
Aliased at A0h
–
A1h
Advanced Power Management
Control Port Register
Advanced Power Management
Status Port Register
Aliased at A0h
–
A1h
Aliased at A0h
–
A1h
Aliased at A0h
–
A1h
Channel 4 DMA Base & Current
Address Register
Aliased at C0h
Channel 4 DMA Base & Current
Count Register
Aliased at C2h
Channel 5 DMA Base & Current
Address Register
Aliased at C4h
Channel 5 DMA Base & Current
Count Register
Aliased at C6h
Channel 6 DMA Base & Current
Address Register
A0h
A1
A4h–A5h
A8h–A9h
ACh–ADh
B0h–B1h
B2h
Section 8.8.2.1, “APM_CNT—Advanced Power
Management Control Port Register” on page 8-56
Section 8.8.2.2, “APM_STS—Advanced Power
Management Status Port Register” on page 8-56
B3h
B4h–B5h
B8h–B9h
BCh–BDh
C0h
Section 8.2.1, “DMABASE_CA—DMA Base and Current
Address Registers” on page 8-22
C1h
C2h
Section 8.2.2, “DMABASE_CC—DMA Base and Current
Count Registers” on page 8-23
C3h
C4h
Section 8.2.1, “DMABASE_CA—DMA Base and Current
Address Registers” on page 8-22
C5h
C6h
Section 8.2.2, “DMABASE_CC—DMA Base and Current
Count Registers” on page 8-23
C7h
C8h
Section 8.2.1, “DMABASE_CA—DMA Base and Current
Address Registers” on page 8-22
Table A-2. ICH Fixed I/O Registers (Sheet 3 of 4)
Register Name
Port
Datasheet Section and Location