82NM10 Datasheet, PDF (615/671 Pages) Intel Corporation – Intel® NM10 Family Express Chipset

Intel HD Audio Controller Registers (D27:F0)
3 FIFO Error — R/WC. The bit is cleared by writing a 1 to it.
0 = No error detected.
1 = FIFO error occurred. This bit is set even if an interrupt is not enabled.
For an input stream, this indicates a FIFO overrun occurring while the RUN bit is set.
When this happens, the FIFO pointers do not increment and the incoming data is not
written into the FIFO, thereby being lost.
For an output stream, this indicates a FIFO underrun when there are still buffers to
send. The hardware should not transmit anything on the link for the associated stream
if there is not valid data to send.
2 Buffer Completion Interrupt Status — R/WC.
0 = Last sample of a buffer has Not been processed as described below.
1 = Set to 1 by the hardware after the last sample of a buffer has been processed, AND
if the Interrupt on Completion bit is set in the command byte of the buffer
descriptor. It remains active until software clears it by writing a 1 to it.
1:0 Reserved.
18.2.37 SDLPIB—Stream Descriptor Link Position in Buffer
Register (Intel HD Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 84h
Input Stream[1]: HDBAR + A4h
Input Stream[2]: HDBAR + C4h
Input Stream[3]: HDBAR + E4h
Output Stream[0]: HDBAR + 104h
Output Stream[1]: HDBAR + 124h
Output Stream[2]: HDBAR + 144h
Output Stream[3]: HDBAR + 164h
Attribute:RO
Default Value:
00000000hSize:32 bits
Bit
Description
31:0
Link Position in Buffer — RO. Indicates the number of bytes that have been received
off the link. This register will count from 0 to the value in the Cyclic Buffer Length
register and then wrap to 0.
18.2.38 SDCBL—Stream Descriptor Cyclic Buffer Length Register
(Intel HD Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 88h
Input Stream[1]: HDBAR + A8h
Input Stream[2]: HDBAR + C8h
Input Stream[3]: HDBAR + E8h
Output Stream[0]: HDBAR + 108h
Output Stream[1]: HDBAR + 128h
Output Stream[2]: HDBAR + 148h
Output Stream[3]: HDBAR + 168h
Attribute: R/W
Default Value:
00000000hSize:32 bits
Datasheet
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