Int 2F Fn B808  U - Network - Relink Keyboard Handler                      [N]

   AX = B808h
   ES:BX -> INT 09 handler network should call after it finishes INT 09

Notes: this call replaces the address to which the network software chains on
     an INT 09 without preserving the original value.  This allows a prior
     handler to unlink, but does not allow a new handler to be added
     such that the network gets the INT 09 first unless the new handler
     completely takes over INT 09 and never chains.
   this function is called by the DOS 3.2 KEYBxx.COM

See Also: AX=B908h