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# Virtual Boy
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a "portable" video game console made by Nintendo in the '90s.
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it supposedly was the beginning of virtual reality... nah, instead it failed to sell well because you use it for 15 minutes and then you get a headache.
its sound generation chip is called Virtual Sound Unit (VSU), a wavetable chip that is a lot like PC Engine, but unlike that, the waves are twice as tall, it doesn't go too low in terms of frequency (~D-2), and the last channel (yep, it has 6 channels) is a noise one.
additionally, channel 5 offers a modulation/sweep unit. the former is similar to FDS' but has much reduced speed control.
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## effects
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- `10xx` : **set waveform.**
- `11xx` : **set noise length.** range is `0` to `7` .
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- only in the noise channel.
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- `12xy` : **setup envelope.**
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- `x` determines whether envelope is enabled or not.
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- `0` : disabled
- `1` : enabled
- `3` : enabled and loop
- yeah, the value `2` isn't useful.
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- `y` sets the speed and direction.
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- `0-7` : down
- `8-F` : up
- `13xy` : **setup sweep.**
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- `x` sets the speed.
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- `0` and `8` are "speed 0" - sweep is ineffective.
- `y` sets the shift (`0` to `7` ).
- `8` and higher will mute the channel.
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- only in channel 5.
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- `14xy` : **setup modulation.**
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- `x` determines whether it's enabled or not.
- 0: disabled
- 1: enabled
- 3: enabled and loop
- 2 isn't useful here either.
- `y` sets the speed.
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- `0` and `8` are "speed 0" - modulation is ineffective.
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- no, you can't really do Yamaha FM using this.
- only in channel 5.
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- `15xx` : **set modulation wave.**
- `xx` points to a wavetable. range is `0` to `FF` .
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- this is an alternative to setting the modulation wave through the instrument.
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## info
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this chip uses the [Virtual Boy ](../4-instrument/virtual-boy.md ) instrument editor.
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## chip config
the following options are available in the Chip Manager window:
- **Waveform storage mode**: selects how will waveforms be loaded.
- Dynamic: allows switching between many waves, but it is not confirmed whether this really works on hardware.
- Static: loads the first 5 waves only.
