Int 2F Fn B908  - PC Network Receiver.com - Unlink Keyboard Handler        [N]

   AX = B908h
   ES:BX -> INT 09 handler RECEIVER should call after it finishes INT 09

Note:  this call replaces the address to which RECEIVER.COM 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 RECEIVER gets the INT 09 first.

See Also: AX=B808h