)
Values GNMA responder's request handler is called with:
	AL = function
	    00h responder request
		CX = length of request data (not including header) (see #02901)
		DS:DI -> request data (see #02901)
		DS:BX -> 528-byte reply buffer
		ES:SI -> responder structure (see #02899) from registration
		DF clear
		interrupts disabled
		Return: AH = acknowledement status
			    00h acknowledgment being returned synchronously
			    nonzero: acknowledgment will be sent via GNMA
				  function 0003h (see #02898)
				CX = length of acknowledement data
				DX:BX -> acknowledgment (may use provided
					  buffer or another buffer)
			AL = completion code
			    00h successful
			    01h-FCh responder-specific
			    FDh invalid request
			DF clear
			interrupts disabled
			other registers may be destroyed
	    01h responder acknowledgement complete
		ES:SI -> responder structure (see #02899) from registration
		DF clear
		interrupts disabled
		Return:	DF clear
			interrupts disabled
			all registers (except SS:SP) may be destroyed
		Note:	this function is called if function 00h returned a
			  responder-provided data buffer; once this function
			  is called, the responder may deallocate the buffer
	    02h responder reset
		ES:SI -> responder structure (see #02899) from registration
		DF clear
		interrupts disabled
		Return:	DF clear
			interrupts disabled
			all registers (except SS:SP) may be destroyed
		Note:	called whenever a network managment application
			  terminates
Note:	the responder handler should switch to a local stack if it enables
	  interrupts or uses more than a few words of stack space
SeeAlso: #02899