ACI

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The ACI of the Xbox provides AC97. It's similar to the AMD-768 ACI, but it is accessed through MMIO instead. The datasheet for the AMD-768 can be found at https://web.archive.org/web/20060322081039/http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/24467.pdf .

The AC97 implementation only supports playback of 16-bit PCM stereo samples at 48kHz[FIXME].

Register addresses

  • 0x110 PCM
  • 0x170 SPDIF

Usage in DirectSound

AC97 is only used to receive buffers from the APU. [FIXME]

Related links

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