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12 AC ’97 Programmer’s Reference Manual
Table 2. Audio Features Distribution Matrix
AC ’97 Audio Controller Features Intel
®
ICH
Intel
®
ICH2
Intel
®
ICH3
Intel
®
ICH4
Intel
®
ICH5
16 bits Stereo PCM Output ⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
16 bits Stereo PCM Input ⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
16 bits Microphone Input ⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
GPIO and Interrupt Support ⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
Two 2.1/2.2/2.3 Codec Support ⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
16 bits 2/4/6 Ch. Surround PCM Output
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
20 bits 2/4/6 Ch. Surround PCM Output
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
Dedicated S/P DIF DMA Output Ch.
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
Third 2.1/2.2/ 2.3 Codec Support
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
Memory Map Control and Status
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
Second 16 bits Stereo PCM Input
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
Second 16 bits Microphone Input
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
PCI 2.3 Power Management
⌧
⌧⌧
⌧
⌧
⌧⌧
⌧
The ICH5 AC ’97 audio controller provides a set of features that require significant software
support. The following paragraphs provide a summary of these features.
The modem support infrastructure has not been changed in any generation of the I/O controller
hub starting with the ICH.