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Routines |
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Used by the routine at 51359.
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Deal with any objects from the room item table at 26512 that are present in the room. These are 'non-scenery' objects that Maroc or the servant can interact with.
This routine determines if an item is stationary (sitting on the floor of the room), carried by the servant, or falling/flying after being dropped by the servant.
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| 51968 | LD HL,(60228) | Get item's data pointer for the room item table at 29551 | ||
| 51971 | CALL 56959 | Check room object table at 29551 to see if any items are in this room. If so, copy the item data into working buffer at 60293. | ||
| 51974 | LD A,(60304) | For visible room objects, this is the graphic number (offset for address table at 38851) | ||
| 51977 | CP 124 | Byte value 124 = the object is not visible (yet),e.g. a key inside a chest | ||
| 51979 | JR Z,51989 | |||
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Object is visible on screen - get object's colour
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| 51981 | LD A,(60299) | Get the colour attribute of the object | ||
| 51984 | AND 15 | Keep the INK colour (0-7), and bit 3, which is set for objects that flash (change colour) | ||
| 51986 | LD (60072),A | ...and store | ||
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Check if item is being carried by the servant
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| 51989 | LD A,(60238) | Item properties byte | ||
| 51992 | LD C,A | Temp store in C register | ||
| 51993 | AND 16 | Check if this item is carried by the servant - bit 4 (16) set | ||
| 51995 | JR NZ,52005 | If so, check/calculate item position based on servant's X/Y co-ordinates | ||
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Item is not being carried by the servant
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| 51997 | LD A,C | Retrieve item properties byte | ||
| 51998 | AND 8 | If bit 3 is set, this item is moving/falling (e.g. after being thrown/dropped by the servant) | ||
| 52000 | JR NZ,52059 | Item is moving/falling - jump out to 52059 | ||
| 52002 | JP 52136 | Item is stationary - jump out to 52136 | ||
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Item is currently held by the servant
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| 52005 | LD A,(60140) | Get active spell number | ||
| 52008 | CP 1 | Check is the servant spell still active? | ||
| 52010 | JR NZ,52044 | If not, servant spell has just been deactivated, so the item is now falling/flying | ||
| 52012 | CALL 56008 | If active, run routine calculating/checking item's vertical position on screen. Adjusted vertical boundary returned in E register ready for room boundary check at 52031 | ||
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Servant is carrying the object, so use the servant's horizontal/vertical speed to calculate that of the object (multiplied x4 as servant speed is stored on a smaller scale):
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| 52015 | LD A,(60161) | Get servant's horizontal movement rate/offset | ||
| 52018 | ADD A,A | Multiply by 4 | ||
| 52019 | ADD A,A | |||
| 52020 | LD (60236),A | ...and store as item's horizontal movement rate/offset | ||
| 52023 | LD A,(60162) | Get servant's vertical movement rate/offset | ||
| 52026 | ADD A,A | Multiply by 4 | ||
| 52027 | ADD A,A | |||
| 52028 | LD (60237),A | ...and store as item's vertical movement rate/offset | ||
| 52031 | CALL 57401 | Check room boundary and adjust item's position accordingly | ||
| 52034 | LD A,(60337) | |||
| 52037 | CP 2 | This carried object status byte was set to 2 once an item has been retrieved from Maroc's backpack by the servant | ||
| 52039 | JR Z,52118 | If this is the case, do a collision check to identify if the servant has moved outside Maroc's backpack area 'hit box' (to prevent auto-cycling through inventory objects). If so, change the byte value (60337) to 1 |
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| 52041 | JP 52263 | |||
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