Editing USB (section)

====Workaround====
The trick for supporting both Boot Keyboard and NKRO is for the keyboard to expose ''two interfaces'' — as if it was two keyboards. One is a boot-capable keyboard interface and the other is a keyboard interface with N-key rollover, but with only one being active at the same time.
The change-overs happen when the boot keyboard receives "Set Protocol" requests, which (standards-compliant) BIOS:es and all fully-fledged operating systems send.

[[Soarer's Converter]] and firmware employ a variation of this trick, known to work with both Windows, MacOS and Linux and also with the non-compliant BIOS'es mentioned above.
The 6KRO "boot" protocol is sent always but the report descriptor for that interface describes it as containing no keys. Therefore, only a BIOS (which does not read report descriptors) would read from that interface but ignore the non-boot interface, and vice versa.<ref name="ghsoarer">Post by '''Soarer''' on Geekhack—[https://geekhack.org/index.php?topic=38786.msg1064755#msg1064755 Re:Are there any USB NKRO keyboards on the market yet?]. Posted 2013-10-04. Retrieved 2016-03-06.</ref>