Audio
- NEC, HuC6280 - CMOS programmable sound generator manual.
- , Stage 1 -town- bloody wolf OST (Runtime waveform example). Youtube.
- malducci, Fire pro 2 OST (Runtime waveform example). Youtube.
- , Batman OST (5-bit PCM example). Youtube.
- , ADPCM demo PC engine (10-bit PCM example). Youtube.
CPU
- MagicKit, PC engine hardware.
- Charles MacDonald, TurboGrafx-16 hardware notes.
- NEC, HuC6280 - CMOS 8-bit microprocessor hardware manual.
- NEC, HuC6280 - CMOS 8-bit microprocessor software manual.
- Bruce Clark, WDC 65C02 opcodes.
Games
- nfggames.com, 101 secrets of the PC engine.
- pc-engine.co.uk, Accessories catalogue.
- hardwarebook.info, HuCard pinout.
Graphics
- NEC, HuC6270 - CMOS video color encoder manual.
- NEC, HuC6270 - CMOS video display controller manual.
- ChibiAkumas, Hardware sprites on the PC engine (TurboGrafx-16).
- Chris Covell, PC-engine/turbografx assembly programming tutorials publisher: youtube.
I/O
- Game Station X, The PC engine exp connector.
- Game Station X, TurboGrafx/duo/PC-engine controller data.
Operating System
- shu.sheldows.com, Memory map.
Photography
- Evan Amos, The vanamo online game museum.
- Rodrigo Copetti (Me), Casual photos, diagrams, screenshots and videos.