msarnoff.org - USB Adapter for Sega Genesis Controller
W65C265SXB: Sega Game Controller Interface PCB (Genesis, Master System, and Atari 2600 Compatible) - YouTube
Pinouts - Documents - Maxim's World of Stuff
Cavo controller joystick 9 pin Atari 2600 Commodore C64 Vic-20 Amiga serie master | eBay
Sega Master System Controller – Raspberryfield – IT, video games and comics
Hyperkin Sega Genesis 6-Button Clone Controller Mod - Atari 8-Bit Computers - AtariAge Forums
Sega Genesis Programming Part 19: 6 Button Controllers
I/O port pinout - Plutiedev
SMS to Megadrive/Genesis cartridge adaptor
Finally the SEGA SC-3000 emulator for PROPC3 and C3Synapse ready for download! — Parallax Forums
Sega Master System Technical Info | Consoles Unleashed
TV game joysticks
Gear to Gear Port SMS Controller Adaptor - Development - SMS Power!
The Game Controller Port, Deconstructed : psmay
Vectrex Controller to Atari 2600 Adapter - CNK
Sega Master System Switchless Region Mod Install Guide | Consoles Unleashed
Sega Master System Technical Info | Consoles Unleashed
C64 DB9 compatibility | Official Pyra and Pandora Site
Any good third-party controllers for Master System? - Retrogaming Roundtable
Sega Genesis Controller Adapter for Sega Master System Games using converter N41 | eBay
SegaMaster System (SMS) and MegaDrive joystick pinout diagram @ pinoutguide.com
Sega Master System Controller – Raspberryfield – IT, video games and comics
Reading the Sega Mega Drive / Genesis control pads | PICAXE Forum
