307013-003 Datasheet, PDF (659/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

AC ’97 Modem Controller Registers (D30:F3) (Desktop and Mobile Only)
17.2.5
x_PICB—Position in Current Buffer Register
(Modem—D30:F3)
I/O Address:
Default Value:
Lockable:
MBAR + 08h (MIPICB),
MBAR + 18h (MOPICB),
0000h
No
Attribute:
Size:
Power Well:
RO
16 bits
Core
Software can read the registers at the offsets 08h, 0Ah, and 0Bh by performing a 32-bit
read from the address offset 08h. Software can also read this register individually by
doing a single, 16-bit read to offset 08h. Reads across DWord boundaries are not
supported.
Bit
15:0
Description
Position In Current Buffer[15:0] — RO. These bits represent the number of
samples left to be processed in the current buffer.
17.2.6
x_PIV—Prefetch Index Value Register
(Modem—D30:F3)
I/O Address:
Default Value:
Lockable:
MBAR + 0Ah (MIPIV),
MBAR + 1Ah (MOPIV)
00h
No
Attribute:
Size:
Power Well:
RO
8 bits
Core
Software can read the registers at the offsets 08h, 0Ah, and 0Bh by performing a 32-bit
read from the address offset 08h. Software can also read this register individually by
doing a single, 8-bit read to offset 0Ah. Reads across DWord boundaries are not
supported.
Bit
Description
7:5 Hardwired to 0
4:0
Prefetched Index Value [4:0] — RO. These bits represent which buffer descriptor in
the list has been prefetched.
Intel ^® ICH7 Family Datasheet
659