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Posted: Fri May 07, 2010 8:42 am
by raz0red
This topic will be updated to reflect the current state of JSVecX, a JavaScript port of the VecX emulator. The emulator was ported from the original C version as developed by Valavan Manohararajah to JavaScript/HTML5. This port relies on the HTML5 Canvas element for display and the Web Audio API for sound (no flash is required).

The emulator can be found at the following location:


You can provide feedback, report bugs, suggest enhancements, etc. by responding to this thread. However, if you don't want to sign up for the forum, you can also send an email to

It is also worth noting that there is nothing illegal about posting the commercial Vectrex roms, they were made available for non-commercial use in the 90's.

Change Log


1.) Added ability to "drag and drop" local ROM files
2.) Added "Birds of Prey" homebrew game
3.) Added "Patriots III" homebrew game
4.) Updated to latest version of JQuery (3.4.1)


1.) Initial sound support (still quite buggy)
2.) Added "Asteroid Cowboy" homebrew game
3.) Added box art for Thrust and Minestorm
4.) Removed Chrome frame extension (deprecated long ago)


1.) Added support for Google Chrome Frame. This will prompt IE users to install this plugin which allows JSVecX to run within Internet Explorer.


1.) Thanks to an awesome tip from Parabellum, author of the great Vectrex emulator ParaJVE, it appears that the Mine Storm bug is now resolved. You can check out his detailed blog entry regarding the bug here (07/07/2006 entry).

2.) Another fix thanks to Parabellum's notes, Bedlam is now working, read his post here (14/07/2006 entry).

3.) Added Polar Rescue, now works thanks to fixes listed above.


1.) Updated to use "fast boot rom", reduces the Vectrex intro screen time.

2.) Several optimizations.


1.) Released initial version.

2.) Examining emulator bugs (see Known issues, below)

Known Issues

1.) Buggy Sound ~ While the emulator now has sound support, it is a bit quirky. Several games will experience periodic audio issues (Berzerk, Star Trek, Armor Attack). Sound can be toggled on and off by clicking the "speaker" button.

2.) Overlays are misaligned ~ (core bug) The vector rendering code of VecX doesn't appear to be 100% accurate. As a result, some of the overlays are a bit misaligned. In addition, text is also sometimes unreadable. I will be looking at the vector rendering code to see if this can be resolved.

Posted: Wed May 19, 2010 10:03 am
by raz0red
Another update, fix for Mine Storm and Bedlam bugs, Polar Rescue now working, thanks to Parabellum!

Posted: Sun May 29, 2011 6:00 pm
by test
It would be nice to add virtual buttons so that one can play on an iPhone.

Re: JSVecX

Posted: Mon May 13, 2019 2:55 pm
by raz0red
Emulator update released. Includes the initial version with sound support (still quite quirky).


Re: JSVecX

Posted: Sun May 19, 2019 8:16 am
by raz0red

Includes ability to drag and drop local ROM files (versus being limited to the cartridges available in the pull down). Added a couple of homebrew games.