82801BA datasheet(14/498 Pages) INTEL

14 / 498 page

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82801BA ICH2 and 82801BAM ICH2-M

Datasheet

9.1.18 PIRQ[n]_ROUT—PIRQ[E,F,G,H] Routing Control

(LPC I/F—D31:F0) ...........................................................................9-9

9.1.19 D31_ERR_CFG—Device 31 Error Configuration Register

(LPC I/F—D31:F0) .........................................................................9-10

9.1.20 D31_ERR_STS—Device 31 Error Status Register

(LPC I/F—D31:F0) .........................................................................9-10

9.1.21 PCI_DMA_CFG—PCI DMA Configuration (LPC I/F—D31:F0) .....9-11

9.1.22 GEN_CNTL—General Control Register (LPC I/F—D31:F0) .........9-11

9.1.23 GEN_STS—General Status (LPC I/F—D31:F0)............................9-13

9.1.24 RTC_CONF—RTC Configuration Register (LPC I/F—D31:F0).....9-14

9.1.25 COM_DEC—LPC I/F Communication Port Decode Ranges

(LPC I/F—D31:F0) .........................................................................9-14

9.1.26 FDD/LPT_DEC—LPC I/F FDD & LPT Decode Ranges

(LPC I/F—D31:F0) .........................................................................9-15

9.1.27 SND_DEC—LPC I/F Sound Decode Ranges

(LPC I/F—D31:F0) .........................................................................9-15

9.1.28 FWH_DEC_EN1—FWH Decode Enable 1 Register

(LPC I/F—D31:F0) .........................................................................9-16

9.1.29 GEN1_DEC—LPC I/F Generic Decode Range 1

(LPC I/F—D31:F0) .........................................................................9-17

9.1.30 LPC_EN—LPC I/F Enables (LPC I/F—D31:F0) ............................9-17

9.1.31 FWH_SEL1—FWH Select 1 Register (LPC I/F—D31:F0).............9-19

9.1.32 GEN2_DEC—LPC I/F Generic Decode Range 2

(LPC I/F—D31:F0) .........................................................................9-20

9.1.33 FWH_SEL2—FWH Select 2 Register (LPC I/F—D31:F0).............9-20

9.1.34 FWH_DEC_EN2—FWH Decode Enable 2 Register

(LPC I/F—D31:F0) .........................................................................9-21

9.1.35 FUNC_DIS—Function Disable Register (LPC I/F—D31:F0) .........9-22

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

9.3

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

9.4

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

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