We just released a new firmware for the adapter. This firmware was totally redone using V-USB library. This insure device stability and compatibility, plus it permit USB reflashing of the device, in case of a later firmware release with more features. Every new order will be fullfilled with this version pre-installed.
Note that this firmware can be reflashed using the USB utility only with release 2.0 or more. The only way to reflash a prior version is using the ISP hardware method. Please contact us for more info.
Based on the original design from Igor Cesko (http://www.cesko.host.sk/) and Paul Qureshi (http://denki.world3.net/), we are currently designing an USB Joystick Adapter specially suited for Atari compatible joysticks.
We stripped down everything except the Atari connector part and adding a convenient ISP connection to the board. We also stripped down the buttons to three, the maximum possible with this spec.
Here is the final schematic of it:
Source code has been slightly modified to fit this hardware:
Hope to have a prototype soon!