307013-003 Datasheet, PDF (652/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

AC ’97 Modem Controller Registers (D30:F3) (Desktop and Mobile Only)
17.1.12 SVID—Subsystem Vendor Identification Register
(Modem—D30:F3)
Address Offset: 2Ch–2Dh
Default Value: 0000h
Lockable:
No
Attribute:
Size:
Power Well:
R/WO
16 bits
Core
The SVID register, in combination with the Subsystem ID register, enable the operating
environment to distinguish one audio subsystem from the other(s). This register is
implemented as write-once register. Once a value is written to it, the value can be read
back. Any subsequent writes will have no effect.
This register is not affected by the D3_HOT to D0 transition.
Bit
15:0
Subsystem Vendor ID — R/WO.
Description
17.1.13 SID—Subsystem Identification Register (Modem—D30:F3)
Address Offset: 2Eh–2Fh
Default Value: 0000h
Lockable:
No
Attribute:
Size:
Power Well:
R/WO
16 bits
Core
The SID register, in combination with the Subsystem Vendor ID register make it
possible for the operating environment to distinguish one audio subsystem from
another. This register is implemented as write-once register. Once a value is written to
it, the value can be read back. Any subsequent writes will have no effect.
This register is not affected by the D3_HOT to D0 transition.
Bit
15:0
Subsystem ID — R/WO.
Description
17.1.14 CAP_PTR—Capabilities Pointer Register (Modem—D30:F3)
Address Offset: 34h
Default Value: 50h
Lockable:
No
Attribute:
Size:
Power Well:
RO
8 bits
Core
This register indicates the offset for the capability pointer.
Bit
Description
7:0
Capabilities Pointer (CAP_PTR) — RO. This field indicates that the first capability pointer
offset is offset 50h
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Intel ^® ICH7 Family Datasheet