Computer Nerd Kev


Projects > VecAdapt

VecAdapt: Vecrex Controller Adapter

To counter the lack of controllers available for the classic Vectrex Video Game console, the VecAdapt allows Sega Mega Drive / Genesis controllers to be connected to the Vectrex without modification. And to top it off, it includes functions for Auto-Fire and "Button Swap" (switch the order of the four Vectrex buttons).

Status: Out of Stock

More available soon

Image of a production model VecAdapt

Available for $30.00 AUD (Australian Dollars)!

Click one of these links to show an up to date conversion to international currencies using Google Currency Converter:
For other currencies, simply change the selection in the currency box on one of the above linked pages.

Postage Costs
In AUD, click on links for currency conversion.

Australia New Zealand Japan USA Canada UK Europe 1 Europe 2
Economy Airmail $11.86 $14.39 $15.85 $15.85 $20.46 $21.48 $21.56
Standard Airmail $7.60 $19.73 $22.26 $23.72 $23.72 $28.32 $28.48 $28.56
Express Post $10.35

International Online tracking is only available with the "Standard Airmail" service, which is also supposed to be quicker than Economy Airmail. There is no additional postage cost for orders of up to four VecAdapts.

Europe 1 (AusPost Zone 6):
France, Germany, Ireland, Italy, Netherlands, Norway, Spain, Sweden, Switzerland.

Europe 2 (AusPost Zone 7):
Austria, Belgium, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Greece, Hungary, Macedonia, Malta, Poland, Portugal, Romania, Russian Federation, Serbia, Slovenia, Turkey, Ukraine. South Africa as well.

For other countries, you can use the Australia Post postage calculator (select weight of "up to 500g").


Orders may by made by Email to “sales” at this domain, or from Ebay.

For Email orders, please send me an Email with the title "VecAdapt Order" and provide the following details:

I will reply with a confirmation of your order, after which you may pay using a method stated below.

Orders will be posted within three Australian business days after payment.


For International orders, I can only accept PayPal for payment. My PayPal address will be provided upon confirmation of an Email order.

For Australian orders, I can also accept Mail Orders. Additionally, I'll also take cash from anyone willing to pick up their order from Ombersley, Victoria, Australia (he he...).

Another view of one VecAdapt
Mega Drive / Genesis controller plugs in on the left, the lead goes to the Vectrex controller port.



The VecAdapt design is very simple to use. Simply plug in the Mega Drive / Genesis controller and connect the output lead to either of the controller plugs on the vectrex. The circuit is powered from the Vectrex, so there are no batteries to bother with. The Auto-Fire and "Button Swap" features can be turned on or off with switches on the top (left=on, right=off), and these features can be toggled at any time during play.

3rd Party Mega Drive / Genesis controllers are also compatible with the VecAdapt, as well as the Sega "Arcade Power Stick" controllers. However the wireless controllers have not been tested, so are not recommended for use.

Mega Drive / Genesis controllers are digital, so Hyperchase, and some homebrew games that rely on the analogue joystick on the Vectrex controller, won't work properly with the VecAdapt. Many homebrew analogue games do offer digital modes or versions.

The adapter maps the Mega Drive / Genesis buttons "A", "B", "C" and "Start" to "4", "3", "2" and "1" respectively as a Vectrex controller (shown in the image below). These can be swapped with the "Button Swap" function on so that they are "1", "2", "3", "4". The extra row of buttons included on later versions of the Mega Drive / Genesis controller are unused.

Default button assignments. The assignment counts the other way when "Button Swap" is enabled (A=1, B=2, C=3 & Start=4).

Additional functions of some Mega Drive / Genesis controllers are likely to work to an extent. Most built-in auto-fire functions will work correctly with the VecAdapt, though "Slow Down" won't usually work because most Vectrex games don't have a pause function which would normally be triggered by the "Start" button on the Mega Drive / Genesis.

Technical Information and Schematics

One of three pre-production VecAdapts sold on Ebay before the December 5th 2014 release of the first production models.

First model production VecAdapt, no longer available.

Second model production VecAdapt, no longer available.


Content Copyright Kevin Koster 2017