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furnace/papers/doc/7-systems/pce.md
freq-mod 1a4290f1c3
somewhat improved system descriptions
2022-03-26 19:55:20 +01:00

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PC Engine/TurboGrafx-16

a console from NEC that, depending on a region: attempted to enter the fierce battle between Nintendo and Sega, but because its capabilities are a mix of third and fourth generation, it failed to last long. (US and Europe) was Nintendo's most fearsome rival, completely defeating Sega Mega Drive and defending itself against Super Famicom (Japan)

it has 6 wavetable channels and the last two ones also double as noise channels. furthermore, it has some PCM and LFO!

effects

  • 10xx: change wave.
  • 11xx: toggle noise mode. only available in the last two channels.
  • 12xx: setup LFO. the following values are accepted:
    • 00: LFO disabled.
    • 01: LFO enabled, shift 0.
    • 02: LFO enabled, shift 4.
    • 03: LFO enabled, shift 8.
    • when LFO is enabled, channel 2 is muted and its output is passed to channel 1's frequency.
  • 13xx: set LFO speed.
  • 17xx: toggle PCM mode.