Adapt Old Video Game Controllers to the PC - Gaming Hacks [Book]
Notes on game controllers | Music Electronics
SOLVED] - PS2 to USB | Tom's Hardware Forum
MEW 2 Pcs Controller Adapter for PlayStation 2 to PlayStation 3 USB and PC Converter Cable Use with DualShock 2 PS2 Wired Controllers : Amazon.sg: Video Games
How to make a DIY PS2 controller to a USB converter - Quora