Gyruss: Routine at AE54

AE54: Handle sprite outside visible screen

Used by the routine at load_sprite_pattern_2.
handle_off_screen_sprite	AE54	LD A,(IX+$00)	Get sprite type
	AE57	CP $0C	If < $0C
	AE59	JR C,handle_off_screen_sprite_2	Then set off-screen values and return
	AE5B	CP $0E	If >= $0C and < $0E
	AE5D	JR C,handle_off_screen_sprite_0	Then jump ahead
	AE5F	CP $12	If >= $0E and < $12
	AE61	JR C,load_sprite_pattern_7	Then just return
	AE63	CP $18	If >= $18
	AE65	JR NC,load_sprite_pattern_7	Then just return
handle_off_screen_sprite_0	AE67	CP $12	If >= $12 and < $12 (not possible)
	AE69	JR C,handle_off_screen_sprite_1	Then decrement total enemies
	AE6B	CP $14	If >= $14 and < $18
	AE6D	JR NC,handle_off_screen_sprite_1	Then decrement total enemies
	AE6F	LD HL,active_enemy_shots	Decrement active enemy shots
	AE72	DEC (HL)	...
	AE73	JR handle_off_screen_sprite_2	Set off-screen values and return
handle_off_screen_sprite_1	AE75	LD HL,total_enemies	Decrement total enemies
	AE78	DEC (HL)	...
	AE79	CP $15	If < $15
	AE7B	JR C,handle_off_screen_sprite_2	Then set off-screen values and return
	AE7D	CP $18	If >= $18
	AE7F	JR NC,handle_off_screen_sprite_2	Then set off-screen values and return
	AE81	LD HL,other_flags	$15 - $17 Reset flag
	AE84	RES 3,(HL)	...
handle_off_screen_sprite_2	AE86	LD (IX+$00),$7F	Set as not allocated
	AE8A	LD (IX+$09),$00	Set x
	AE8E	LD (IX+$08),$F8	Set y
	AE92	JR load_sprite_pattern_7