The following is a list of firmware compatibility AppVars I've already created for you to use:
The firmware compatibility AppVars are created the same way that payload AppVars are -- through the use of a .bin file of data and the To8XV converter application.
The format of these AppVars is as follows:
* [jig response size (2 bytes, Little Endian!)] [jig response data]
* [descriptor size (2 bytes, Little Endian!)] [device 4 configuration descriptor 3 data]
The entries with asterisks are required. Others may be added in the future; they are NOT required, but you MUST have an entry there with a size of zero.
An example of a .bin file with this data is here.