The Hobbit (v1.0): Routine at 9A5D

9A5D: Prepare for the characters' turn

Notes the room Bilbo is in ($B5E6, 9ECB) and whether it is dark there ($976A). It is also the default handler for action 0 in C61F, which makes it a harmless 'do nothing special' routine.
9A5D	LD A,$00	A = 0 (Bilbo)
9A5F	CALL $9ECB	A = Bilbo's own room
9A62	LD ($B5E6),A	Remember it, for 9A28 and the character loop to compare against
9A65	CALL $954D	Is it too dark for Bilbo to see?
9A68	LD A,$00	Assume not
9A6A	JR NC,$9A6D	Assume not
9A6C	INC A	It is dark
9A6D	LD ($976A),A	Remember whether Bilbo is in the dark, for the rest of this turn
9A70	RET