The DSP has general-purpose and dedicated registers in each of its functional blocks, страница 15

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Table B-16. CB_FEFx Register Bit Descriptions

Bit Position	Bit Name	Description
3:0	Reserved
4	GWKF	Wakeup Force. Sets the CB_FE0:GWAKE bit in the Function Event register (equivalent to PME_Status). Does not affect the state of CB_FPS0:GWAKE in the Function Present State register.
14:5	Reserved
15	INTF	Interrupt Force. Sets the CB_FE0:INTRE bit in the Function Event register. Does not affect the CB_FPS0:INTR bit in the Function Present State register.

A C ’97 C ontroller Re g iste rs

These control registers for the serial port are used for audio (sound) and modem, specifically V.90 modems under codec control.

Table B-17. AC’97 Control Registers

Register Name	Description	PCI Address	USB Address	DSP I/O Page	DSP I/O Address
AC97LCTL	AC’97 Link Control Setup control for AC’97 interface	0x0C1-0x0C0	0x00C1-0x00C0	0x00	0xC0
AC97STAT	AC’97 Link Status Setup control for AC’97 interface	0x0C3-0x0C2	0x00C3-0x00C2	0x00	0xC2
AC97SEN	AC’97 Slot Enable Register Setup control for AC’97 interface	0x0C5-0x0C4	0x00C5-0x00C4	0x00	0xC4
AC97SVAL	AC’97 Input Slot Valid Current status of valid frame from AC’97 link	0x0C7-0x0C6	0x00C7-0x00C6	0x00	0xC6
AC97SREQ	AC’97 Slot Request Current status of AC’97 slot requests	0x0C9-0x0C8	0x00C9-0x00C8	0x00	0xC8

Table B-17. AC’97 Control Registers (Continued)

Register

Name

Description

PCI Address

USB Address

DSP

I/O

Page

DSP

I/O

Address

AC97SIF

AC’97 External

GPIO Status

GPIO slot 12 interface register

0x0CB-0x0CA

0x00CB-0x00CA

0x00

0xCA

A C ’97 Link C ontrol/Sta tus Re g iste r (A C 97LC TL)

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A C ’97 Link Sta tus Re g iste r (A C 97STA T) The following illustration shows the AC’97 Link Status Register Bit Definitions
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