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A mapper chip which made NES cartridges exceeding 1MB possible. It has two pulse channels which are very similar to the ones found in the NES, but lacking the sweep unit. Additionally, it offers an 8-bit DAC which can be used to play samples. Only one game is known to use it, though.

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Channel Configuration

  • 2 pulse channels
    • Similar to NES pulse channels
    • No sweep unit
    • Configurable duty cycle
  • 1 8-bit DAC channel
    • Sample playback
    • Rarely used in actual games

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Effects

EffectDescription
12xxSet duty cycle or noise mode of channel
Range: 0-3 for pulse channels

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Chip Configuration

The following options are available in the Chip Manager window:
  • Clock rate: Sets the rate at which the chip will run

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Instrument Editor

This chip uses the NES and Generic Sample instrument editors.

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