mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-26 06:25:16 +00:00
23 lines
939 B
Markdown
23 lines
939 B
Markdown
# PowerNoise
|
|
|
|
a fantasy sound chip created by The Beesh-Spweesh! and jvsTSX for the Hexheld fantasy video game console.
|
|
|
|
its design employs linear-feedback shift registers (LFSR) for sound generation. this technology is used in many random number generators to produce noise, but it is also capable of producing other tones.
|
|
|
|
it has three noise channels and one "slope" channel capable of generating a variety of saw waves.
|
|
|
|
it outputs stereo sound with 4-bit volume control per channel and 3-bit master volume control.
|
|
|
|
refer to its instrument type's documentation for details on sound synthesis.
|
|
|
|
## effect commands
|
|
|
|
- `20xx`: **load LFSR value (low byte).**
|
|
- on the slope channel, this sets its accumulator (from `00` to `7F`).
|
|
- `21xx`: **load LFSR value (high byte).**
|
|
- `22xx`: **write to I/O port A.**
|
|
- `23xx`: **write to I/O port B.**
|
|
|
|
## info
|
|
|
|
this chip uses the [PowerNoise](../4-instrument/powernoise.md) instrument editor.
|