furnace/papers/doc/7-systems/nes.md

# NES

the console from Nintendo that plays Super Mario Bros. and helped revive the agonizing video game market in the US during mid-80s.

also known as Famicom.

# effects

- `12xx`: set duty cycle or noise mode of channel.
  - may be 0-3 for the pulse channels and 0-1 for the noise channel.
- `13xy`: setup sweep up.
  - `x` is the time.
  - `y` is the shift.
  - set to 0 to disable it.
- `14xy`: setup sweep down.
  - `x` is the time.
  - `y` is the shift.
  - set to 0 to disable it.
update documentation 2022-01-16 06:10:43 +00:00			`# NES`

			`the console from Nintendo that plays Super Mario Bros. and helped revive the agonizing video game market in the US during mid-80s.`

			`also known as Famicom.`

			`# effects`

			- `12xx`: set duty cycle or noise mode of channel.
			`- may be 0-3 for the pulse channels and 0-1 for the noise channel.`
NES: add hardware sweep effect 2022-02-01 23:28:48 +00:00			- `13xy`: setup sweep up.
			- `x` is the time.
			- `y` is the shift.
			`- set to 0 to disable it.`
			- `14xy`: setup sweep down.
			- `x` is the time.
			- `y` is the shift.
			`- set to 0 to disable it.`