https://github.com/LIJI32/GBVisualizer

https://github.com/LIJI32/GBVisualizer

Last synced: 2 months ago
JSON representation

• Host: GitHub
• URL: https://github.com/LIJI32/GBVisualizer
• Owner: LIJI32
• Created: 2016-02-07T22:47:08.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2017-04-14T15:58:37.000Z (about 7 years ago)
• Last Synced: 2024-01-23T16:12:34.511Z (5 months ago)
• Language: Assembly
• Size: 74.2 KB
• Stars: 27
• Watchers: 3
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Lists

• awesome-gbdev - GBVisualizer - Demonstrating the use of two undocumented Game Boy Color registers, nicknamed PCM12 (FF76) and PCM34 (FF77), which can be used to read the current PCM amplitude of the 4 APU channels. (Related projects / Post processing)
• awesome-gb-dev-zh - GBVisualizer

README

        
# GBVisualizer

A simple demo demonstrating the use of two undocumented Gameboy Color registers, nicknamed PCM12 (FF76) and PCM34 (FF77), which can be used to read the current PCM amplitude of the 4 APU channels. The demo uses these registers to visualize music in an oscilloscope-like manner. The oscillation wave is a bit of unusual, because a Gameboy's waveforms are not centered.

GBVisualizer was designed to work on and tested on a Gameboy Color. PCM12 and PCM34 are not likely to exist on an original Gameboy, but I do not have one to verify. As of April 2017, the only publicly released emulator that emulates these two registers and supports running this demo is [SameBoy](https://sameboy.github.io/) ([GitHub](https://github.com/LIJI32/SameBoy)).

Music for this demo is adapted from [my disassembly of Super Bomberman](https://github.com/LIJI32/superbomberman/tree/master/dboot/songs).

This is how it looks on an emulator supporting these registers: 


![Screenshot](screenshot.png?raw=true)