Routines
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723F: Handler: Room 01
Handles room 01 logic. The current level in B controls which objects are initialised or updated on each pass.
Levels Baddies
01 None
02 Helicopter
03 Helicopter, Helicopter (2nd)
04 Helicopter, Balloon
05+ Helicopter, Balloon
Input
B Current level
Handler_Room01 723F LD A,B Copy the current level into A.
7240 CP $01 Return if this is level 01.
7242 RET Z
Add the helicopter.
7243 LD IX,$DAD8 IX=Sprite06_3Wide_X_Position.
7247 LD IY,$7508 IY=Helicopter_State_Data_1.
724B PUSH AF Stash the current level on the stack.
724C CALL Handler_Helicopter Call Handler_Helicopter.
724F POP AF Restore the current level from the stack.
Add the second object (level 03 only).
7250 LD IX,$DADC IX=Sprite07_3Wide_X_Position.
7254 LD IY,$750D IY=Helicopter_State_Data_2.
7258 CP $03 Is this level 03?
725A PUSH AF Stash the current level on the stack.
725B CALL Z,Handler_Helicopter_Entry Call Handler_Helicopter_Entry if this is level 03.
725E POP AF Restore the current level from the stack.
Add the balloon if this is level 04 or higher.
725F CP $04 Call Handler_Balloon if this is level 04 or higher.
7261 CALL NC,Handler_Balloon
7264 RET Return.
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