The Hobbit (v1.0): Routine at A5D5

Does nothing while the valuable treasure (location at C4CC) is still in room 41. Once it has been moved, and if the dragon's current room is lit, a random number from 0 to 100 (9BF4) decides: below 80, 'in the distance you see the shape of a monstrous dragon flying after you.'; otherwise 'the dragon descends and in a terrific spout of flames burns you to a crisp.' and Bilbo dies. Because of the skew in the random numbers (9BFD), the fatal result comes up about 16% of the time, every turn, for as long as the dragon lives.

Does nothing while the valuable treasure (location at C4CC) is still in room 41. Once it has been moved, and if the dragon's current room is lit, a random number from 0 to 100 (9BF4) decides: below 80, 'in the distance you see the shape of a monstrous dragon flying after you.'; otherwise 'the dragon descends and in a terrific spout of flames burns you to a crisp.' and Bilbo dies. Because of the skew in the random numbers (9BFD), the fatal result comes up about 16% of the time, every turn, for as long as the dragon lives.
A5D5	LD A,($C4CC)	Is the treasure still in room 41?
A5D8	CP $29	Is the treasure still in room 41?
A5DA	RET Z	Yes: the dragon sleeps on
A5DB	CALL $9C99	Dry run? Then stop: this would work
A5DE	LD A,$01	Make sure Bilbo sees what follows
A5E0	LD ($B5F3),A	Make sure Bilbo sees what follows
A5E3	CALL $9C8C	IX = the room the dragon (the actor) is in
A5E6	BIT 7,(IX+$00)	Is it lit?
A5EA	RET Z	No: nothing happens
A5EB	LD HL,$B098	"in the distance you see the shape of a monstrous dragon flying after you."
A5EE	LD A,$64	Pick a random number from 0 to 100
A5F0	CALL $9BF4	Pick a random number from 0 to 100
A5F3	CP $50	Below 80?
A5F5	JR C,$A5B7	Yes: the dragon is just a shape in the distance
A5F7	LD HL,$B0AC	Otherwise: "the dragon descends and in a terrific spout of flames burns you to a crisp."
A5FA	CALL $72D4
A5FD	JP $903C	Bilbo is dead