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82801BA ICH2
Datasheet
9.2
DMA I/O Registers......................................................................................9-23
9.2.1
DMABASE_CA—DMA Base and Current Address Registers.......9-24
9.2.2
DMABASE_CC—DMA Base and Current Count Registers...........9-25
9.2.3
DMAMEM_LP—DMA Memory Low Page Registers .....................9-25
9.2.4
DMACMD—DMA Command Register...........................................9-26
9.2.5
DMASTS—DMA Status Register...................................................9-26
9.2.6
DMA_WRSMSK—DMA Write Single Mask Register.....................9-27
9.2.7
DMACH_MODE—DMA Channel Mode Register...........................9-27
9.2.8
DMA Clear Byte Pointer Register ..................................................9-28
9.2.9
DMA Master Clear Register...........................................................9-28
9.2.10 DMA_CLMSK—DMA Clear Mask Register ...................................9-28
9.2.11 DMA_WRMSK—DMA Write All Mask Register.............................9-29
Timer I/O Registers.....................................................................................9-30
9.3.1
TCW—Timer Control Word Register .............................................9-30
9.3.1.1
RDBK_CMD—Read Back Command ............................9-31
9.3.1.2
LTCH_CMD—Counter Latch Command........................9-31
9.3.2
SBYTE_FMT—Interval Timer Status Byte Format Register..........9-32
9.3.3
Counter Access Ports Register......................................................9-32
8259 Interrupt Controller (PIC) Registers...................................................9-33
9.4.1
Interrupt Controller I/O MAP ..........................................................9-33
9.4.2
ICW1—Initialization Command Word 1 Register...........................9-34
9.4.3
ICW2—Initialization Command Word 2 Register...........................9-35
9.4.4
ICW3—Master Controller Initialization Command Word 3
Register .........................................................................................9-35
9.4.5
ICW3—Slave Controller Initialization Command Word 3
Register .........................................................................................9-36
9.4.6
ICW4—Initialization Command Word 4 Register...........................9-36
9.4.7
OCW1—Operational Control Word 1 (Interrupt Mask) Register....9-36
9.4.8
OCW2—Operational Control Word 2 Register ..............................9-37
9.4.9
OCW3—Operational Control Word 3 Register ..............................9-38
9.4.10 ELCR1—Master Controller Edge/Level Triggered Register ..........9-39
9.4.11 ELCR2—Slave Controller Edge/Level Triggered Register ............9-40
Advanced Interrupt Controller (APIC).........................................................9-41
9.5.1
APIC Register Map........................................................................9-41
9.5.2
IND—Index Register......................................................................9-41
9.5.3
DAT—Data Register......................................................................9-42
9.5.4
IRQPA—IRQ Pin Assertion Register.............................................9-42
9.5.5
EOIR—EOI Register......................................................................9-43
9.5.6
ID—Identification Register.............................................................9-43
9.5.7
VER—Version Register .................................................................9-44
9.5.8
ARBID—Arbitration ID Register.....................................................9-44
9.5.9
BOOT_CONFIG—Boot Configuration Register.............................9-44
9.5.10 Redirection Table...........................................................................9-45
Real Time Clock Registers.........................................................................9-47
9.6.1
I/O Register Address Map .............................................................9-47
9.6.2
Indexed Registers..........................................................................9-47
9.6.2.1
RTC_REGA—Register A ...............................................9-48
9.6.2.2
RTC_REGB—Register B (General Configuration).........9-49
9.6.2.3
RTC_REGC—Register C (Flag Register) ......................9-50
9.6.2.4
RTC_REGD—Register D (Flag Register) ......................9-50
9.3
9.4
9.5
9.6
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