Routines
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961B: Handle A.C.G. Door
The handler for the A.C.G. door (sprite ID 24 in HandlerTable2). When the three slots of the inventory hold the three A.C.G. key pieces (sprite IDs 8C 8D and 8E in that order) the doorway is opened and the door is used as an exit with HandlerDoorExit_Check, with a bigger range than other doors. Otherwise the doorway is closed and the door is just shown by HandlerRoomItem.
Input
IX The door entity
HandlerDoorACGExit 961B LD HL,$5E32 Point HL at the sprite ID in the first slot of the inventory at Inventory_Slot1_Sprite_Id.
961E LD DE,$0004 DE=0004 (the size of a slot).
9621 LD A,(HL) Fetch the sprite ID in the slot.
9622 CP $8C Jump to HandlerDoorACGExit_Locked if it is not 8C.
9624 JR NZ,HandlerDoorACGExit_Locked
9626 ADD HL,DE Move HL on to the second slot.
9627 LD A,(HL) Fetch the sprite ID in the slot.
9628 CP $8D Jump to HandlerDoorACGExit_Locked if it is not 8D.
962A JR NZ,HandlerDoorACGExit_Locked
962C ADD HL,DE Move HL on to the third slot.
962D LD A,(HL) Fetch the sprite ID in the slot.
962E CP $8E Jump to HandlerDoorACGExit_Locked if it is not 8E.
9630 JR NZ,HandlerDoorACGExit_Locked
9632 CALL OpenDoorway Call OpenDoorway to open the doorway.
9635 LD BC,$3020 BC=3020 (the range of the door).
9638 JP HandlerDoorExit_Check Jump to HandlerDoorExit_Check to check whether the player is in range of the door.
HandlerDoorACGExit_Locked 963B CALL CloseDoorway Call CloseDoorway to close the doorway.
963E JP HandlerRoomItem Jump to HandlerRoomItem to handle a room item that does nothing.
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