Editing Atari interface (section)

==Adaptors to USB==
Active adaptors (''protocol converters'') have also been part of keyboard-adaptors for e.g. the [[Commodore Amiga#Keyboard adapters#|Commodore Amiga]] and [[Commodore 64#Conversion to USB|Commodore 64]].

For mouse adaptors to/from Commodore Amiga, Atari ST and PCs, see also [[Bus mouse#Adaptors|Bus Mouse]].

===Open source/hardware===
* [http://www.grandideastudio.com/stelladaptor-2600/ Stelladaptor]. Designed especially for the Atari 2600 emulator [https://stella-emu.github.io/ Stella]. Once manufactured by [http://www.atariage.com/ AtariAge], then discontinued and opened up. Handles joystick as analogue USB joystick. Input from paddles and driving controller are in a special format that Stella treats differently if from a "Stelladaptor". Based on the PIC16C745.

* Simon Inns' [https://www.waitingforfriday.com/?p=508 Atari joystick USB adapter].  Schematics and source code for two-port joystick-only adaptor are under the Creative Commons license.
Uses the PIC18F2550 µcontroller.

* MatthewH's [https://www.instructables.com/id/Classic-Joystick-to-USB-Adaptor/ Classic Joystick to USB Keyboard Adaptor]. Arduino "sketch" for the Arduino Leonardo. ([[:Category:ATmega32u4|ATmega32u4]])

* Kair.us [http://kair.us/projects/jakadapter/index.html Jakadapter]. Supports two joysticks, paddles and Sega gamepads. Based on the PIC18F24K50.

===For sale and Open Source===
* Retronic Design [https://www.retronicdesign.com/en/specifications/ Universal DB9 to USB joystick adapter module]. Using the ATMEL ATMEGA 328p. Different firmware for different classes of peripherals.

* Raphnet [https://www.raphnet.net/electronique/atari_usb/index_en.php Atari/SMS/Genesis joystick/controller/multi-tap to USB adapter] Primarily for Sega Mega Drive/Genesis, but supports also Atari-compatible joysticks.

===Commercial===
* [http://2600-daptor.com/ 2600-daptor]. Four generations with different capabilities. Latest supports a large number of devices, with DIP switches or auto-detect if holding down first button when connecting.

* Retro-Bit Atari 2600 to USB adapter. Connects two joysticks.

* RetroUSB [https://www.retrousb.com/product_info.php?cPath=21&products_id=70 USB Atari RetroPort]. Joysticks only.