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Routines |
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Sends the player to the room to the south if it has gone past the south edge of the room. The y position is set to 00, which PlacePlayerAtDoor takes as the sign that the player has come out of the south and puts it at the north side of the new room.
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Leave if past the south edge.
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| LeaveRoomToSouth | CB29 | POP HL | Unstack the size of the room in X and Y. | |||||||
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Work out the coordinate of the south edge of the room.
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| CB2A | LD A,$80 | Set A to 80. | ||||||||
| CB2C | SUB H | Subtract H. | ||||||||
| CB2D | LD H,A | Copy it to H. | ||||||||
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Add the speed in Y and the depth of the player to the Y coordinate.
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| CB2E | LD A,(IX+$02) | Fetch the y position of the player. | ||||||||
| CB31 | ADD A,(IX+$0A) | Add the speed along the y axis. | ||||||||
| CB34 | ADD A,(IX+$05) | Add the depth of the player. | ||||||||
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Compare it with the south edge.
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| CB37 | CP H | Return if the player is still in the room. | ||||||||
| CB38 | RET NC | |||||||||
| CB39 | LD (IX+$02),$00 | Write 00 to the y position. | ||||||||
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Fetch the room number and take 10 off it to go to the room to the south.
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| CB3D | LD A,(IX+$08) | Fetch the room number. | ||||||||
| CB40 | SUB $10 | Subtract 10. | ||||||||
| CB42 | JP ChangeRoom | Jump to ChangeRoom. | ||||||||
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View the equivalent code in;
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