Nightshade: Routine at C083

The routine for objects of type 70 to 7F, the creatures. A creature wanders about the village and hurts the player if it touches. It vanishes when the player is more than three cells away. When a shot hits it, the kind of the shot and the kind of the creature are added together to choose one of four things to happen to it (see HitOutcomeTable).

The routine for objects of type 70 to 7F, the creatures. A creature wanders about the village and hurts the player if it touches. It vanishes when the player is more than three cells away. When a shot hits it, the kind of the shot and the kind of the creature are added together to choose one of four things to happen to it (see HitOutcomeTable).
UpdateCreature	C083	LD A,(IX+$05)	Set the velocity of the creature from its speed and the way it faces.
	C086	CALL SetVelocityFromSpeed
	C089	CALL TestMove	Check whether the creature has run into the scenery.
	C08C	BIT 0,(IX+$07)	Check whether it did.
	C090	CALL NZ,PlayBumpSound	Play the bump sound if it did.
	C093	RES 1,(IX+$07)	Clear the flag that shows that the creature has been drawn, ready for the next frame.
	C097	CALL MoveObject	Move the creature.
	C09A	CALL UpdateDirection	Turn the creature to a new direction if it has gone far enough in this one.
	C09D	CALL SetSpriteFromDirection	Choose the picture of the creature from the way it faces.
	C0A0	LD C,$03	Set the distance at which the creature gives up to 03 cells.
	C0A2	CALL CheckPlayerClose	Check whether the creature is close to the player.
	C0A5	JR NC,UpdateCreature_Vanish	Jump to UpdateCreature_Vanish if the player is further away than that.
	C0A7	CALL CheckShotHit	Check whether a shot has hit the creature.
	C0AA	JR C,UpdateCreature_Hit	Jump to UpdateCreature_Hit if one has.
	C0AC	CALL CheckPlayerCollision	Check whether the creature is touching the player.
	C0AF	RET NC	Return if it is not.
	C0B0	LD BC,$0025	Set the points that touching a creature costs.
	C0B3	CALL AddToScore	Add the points to the score.
	C0B6	JP HurtPlayer	Hurt the player (see HurtPlayer).
A shot has hit the creature. Add together the kind of the creature and the kind of the shot (its type divided by four) to choose what happens.
UpdateCreature_Hit	C0B9	LD A,(IX+$00)	Work out the kind of the creature, by dividing its type by four.
	C0BC	SRL A
	C0BE	SRL A
	C0C0	LD C,A	Keep it in C.
	C0C1	LD A,(IY+$00)	Work out the kind of the shot, by dividing its type by four.
	C0C4	SRL A
	C0C6	SRL A
	C0C8	ADD A,C	Add the two kinds together.
	C0C9	AND %00000011	Keep the result between 00 and 03.
	C0CB	LD BC,$C0D1	Point at the table of outcomes.
	C0CE	JP JumpToTableRoutine	Jump to the outcome that was chosen.