The systems on which BBS has been found broken is Award, not Phoenix.
* Support for calling real mode functions using far calls,
with argument on the stack. This was implemented to support
the BIOS BBS specification, but subsequent experiments show
- that the most common BIOS core on the planet, Phoenix,
+ that the at least one of the most common BIOS cores, Award,
passes the presence check but doesn't actually implement the
functionality.