Hardware/DSP

The Flipper, Hollywood, and Latte SoCs feature and audio DSP made by Macronix.

Components

The DSP can be divided into 3 logical components:

• DSP Core
  • Runs a program from IROM or IRAM to perform computations
  • Official usage:
    • Memory Card unlock algorithm
    • Audio effects
  • Wii-Linux driver: None
  • NetBSD driver: None
• ARAM Accelerator
  • Does DMA to/from ARAM and the Hi-Speed Port
  • Wii-Linux driver: drivers/block/gcn-aram.c
  • NetBSD driver: None
• Audio playback engine
  • Sends audio data from system memory to the Audio Interface
  • Official usage:
    • Audio playback
  • Wii-Linux driver: sound/ppc/gcn-ai.c
  • NetBSD driver: sys/arch/evbppc/nintendo/dev/bwdsp.c