The DSP has general-purpose and dedicated registers in each of its functional blocks, страница 25

Address	Name	Reset	Comments
0x23-0x20	Base Address 5	0x0	Unimplemented
0x27-0x24	Base Address 5	0x0	Unimplemented
0x2B-0x28	Cardbus CIS Pointer	0x1FD03	CIS RAM Pointer - Function 2 (Read Only).
0x2D-0x2C	Subsystem Vendor ID	0x11D4	Writable from the DSP during initialization
0x2F-0x2E	Subsystem Device ID	0x219E	Writable from the DSP during initialization
0x33-0x30	Expansion ROM Base Address	0x0	Unimplemented
0x34	Capabilities Pointer	0x40	Read-only
0x3C	Interrupt Line	0x0
0x3D	Interrupt Pin	0x1	Uses INTA Pin
0x3E	Min_Gnt	0x1	Read-only
0x3F	Max_Lat	0x4	Read-only
0x40	Capability ID	0x1	Power Management Capability Identifier
0x41	Next_Cap_Ptr	0x0	Read-only
0x43-0x42	Power Management Capabilities	0x6C22	Writable from the DSP during initialization
0x45-0x44	Power Management Control/Status	0x0	Bits 15 and 8 initialized only on power-up.

Inte ra c tion Be tw e e n Re g iste rs

Table B-31 on page B-67 and Table B-32 on page B-70 show the register interactions between functions.

Table B-31. Configuration Space Register Interactions Between Functions

Name			Comments
Vendor ID			Separate registers, no interaction
Device ID			Separate registers, no interaction
GROUP	Description	Bit	Bit Function
Command Register Bits	I/O Space Enable	0	Enables are separate in each function and go along with the function’s base addresses
	Memory Space Enable	1	Enables are separate in each function and go along with the function’s base addresses
	Bus Master Enable	2	Enables are separate in each function and go along with the function’s base addresses
	Special Cycles	3	None of the functions support special cycles, read-only
	Memory Write and Invalidate	4	No function generates Memory Write and Invalidate commands, read-only
	VGA Palette Snoop	5	Not applicable, read-only
	Parity Error Response	6	If any function has the bit set, PERR may be asserted
	Stepping Control	7	No address stepping is done, read-only

Table B-31. Configuration Space Register Interactions Between Functions (Continued)