The Hobbit (v1.0): Routine at 8789

8789: Decide about the instrument

The instrument's counterpart of 87AD, using the flags at $832F: no noun given goes to 883E ('unlock the door with what?'), a noun that matched nothing widens the search as for the target, and if exactly one instrument would work the action is simply carried out.
8789	LD HL,$832F	Was any noun at all given for the instrument?
878C	BIT 0,(HL)	Was any noun at all given for the instrument?
878E	JP Z,$883E	No: go and ask "with what?" or say there was nothing suitable
8791	BIT 1,(HL)	Are we still in the middle of searching (rather than already knowing the answer)?
8793	LD HL,$8339
8796	LD DE,$B5DA
8799	LD BC,$B5F0
879C	JR Z,$87EF	Not searching yet: go and search properly, exactly as for the target
879E	LD A,($8332)	Already searched: did EXACTLY one instrument candidate work?
87A1	AND A
87A2	JP Z,$87E6	None worked at all: let the action's own handler explain why
87A5	LD A,($8346)	(the frame offset, though not needed again here)
87A8	LD A,($8339)	A = the instrument's own noun word
87AB	JR $877A	More than one worked: ask "which one?"