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#adpcm

2 posts

RetrogamingDeep Dive October 4, 2026 8 min read

Neo Geo YM2610 Sound CPU: Command Latches, ADPCM, and ROM Banks

Trace the Neo Geo Z80 sound command path into the YM2610, distinguishing FM and ADPCM engines, sample ROM mapping, and banked driver state.

#neo-geo#ym2610#z80

RetrogamingDeep Dive October 3, 2026 8 min read

Trace PlayStation SPU voices from ADPCM blocks and key-on state through ADSR, pitch, sound RAM, CD mixing, IRQs, and reverb memory.

#playstation#spu#adpcm