Playing Atari ST Music on the Amiga with Zero CPU
Arnaud Carré published a detailed technical article on emulating the Yamaha YM2149 sound chip (used in Atari ST) on an Amiga, achieving zero CPU usage for audio mixing. The technique leverages the Amiga's Paula chip to handle sound generation, offloading the CPU entirely. Carré's implementation, called "YM Fast Emu," runs on a stock Amiga 500 and can play Atari ST SNDH music files. The emulation is cycle-accurate and supports all YM2149 registers. A demo video shows it working with several classic Atari ST tunes. The project is open-source and available on GitHub. This is significant because it allows Amiga users to enjoy Atari ST music without sacrificing CPU performance, which is critical for demos and games that require full CPU power for graphics and logic.
Enables Amiga users to play Atari ST music without CPU overhead, freeing resources for other tasks.