http://highlyliquid.com/kits/midi2600/
MIDI-to-Joystick / MIDI-to-Keypad Adapter for Atari 2600
$44.95 (Internal), $47.95 (External) - Buy Now
Assembly Service: Add $29.95
In Stock: Ships Friday, January 12th
Applications
* MIDI control for Synthcart synthesizer cartridge—more info
* MIDI-scripted & synchronized game performances
Features
* Use MIDI notes to send joystick or keypad control signals to any
Atari 2600 console
* Additional outputs for Select & Reset control
* Powered by game console—no separate power supply required
* User-selected MIDI channel
* Power and activity LEDs
* Compact size: 83mm x 57mm (3.25" x 2.25")
MIDI2600
MIDI2600-Internal Kit Contents
MIDI2600-Internal
For installation inside console.
Kit Contents:
* Printed circuit board
* Pre-programmed microcontroller
* All required components and mounting hardware
* Panel-mount MIDI jack & LED panel bezels
* Hook-up wire (not shown)
Optional Accessory:
* Switchcraft 1/4" phone jack (not shown)
MIDI2600
MIDI2600-External Kit Contents
MIDI2600-External
For connection to console via joystick cables.*
Kit Contents:
* Printed circuit board
* Pre-programmed microcontroller
* All required components
* PCB-mount MIDI jack
* 2 x PCB-mount female DE-9 connector
* Terminal block (Select & Reset output)
* Requires 2 x DE-9 extension cable, not included. Sega Genesis
controller extension cables are compatible.