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Routines |
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Used by the routines at Action_Direction and Action_LeaveIfTheWayIsOpen.
Checks the object's attributes and volume against the move volume at ActionMoveVolume and the current location at ActionLocationID before a move is allowed.
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| Action_CheckTheObjectFlags | 8E85 | AND A | Jump to Action_CheckTheObjectFlags_ReadTheLocation if A is zero. | |
| 8E86 | JR Z,Action_CheckTheObjectFlags_ReadTheLocation | |||
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Find the object's record.
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| 8E88 | CALL LocateObject | Call LocateObject to locate object. | ||
| 8E8B | LD A,(IX+$07) | Read the attribute flags from the object record. | ||
| 8E8E | AND $28 | Keep bits 3, 5. | ||
| 8E90 | JR Z,Action_CheckTheObjectFlags_ReturnFlagValueOne | Jump to Action_CheckTheObjectFlags_ReturnFlagValueOne when the object is neither broken nor open. | ||
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Test whose turn it is.
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| 8E92 | LD A,($B6EA) | Jump to Action_CheckTheObjectFlags_ReadTheMoveVolume if *CurrentCharacter is not zero. | ||
| 8E95 | AND A | |||
| 8E96 | JR NZ,Action_CheckTheObjectFlags_ReadTheMoveVolume | |||
| 8E98 | BIT 7,(IX+$04) | Jump to Action_CheckTheObjectFlags_ReturnFlagValueOne if bit 7 of the object's second flag is set. | ||
| 8E9C | JR NZ,Action_CheckTheObjectFlags_ReturnFlagValueOne | |||
| Action_CheckTheObjectFlags_ReadTheMoveVolume | 8E9E | LD A,($8D9C) | Read the move volume. | |
| 8EA1 | LD B,(IX+$02) | Read the volume from the object record. | ||
| 8EA4 | SUB B | Jump to Action_CheckTheObjectFlags_ReturnFlagValueTwo if the move volume is not below the object's volume. | ||
| 8EA5 | JR NC,Action_CheckTheObjectFlags_ReturnFlagValueTwo | |||
| Action_CheckTheObjectFlags_ReadTheLocation | 8EA7 | LD A,($8D9B) | Read the current location. | |
| 8EAA | LD B,A | Copy the result into B. | ||
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Find the location's record.
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| 8EAB | CALL LocateLocation | Call LocateLocation to locate location. | ||
| 8EAE | LD ($8D99),IX | Save the location record pointer at ActionLocationData, and jump to Action_CheckTheObjectFlags_ReturnZero if this location's volume byte is FF. | ||
| 8EB2 | LD A,$FF | |||
| 8EB4 | CP (IX+$01) | |||
| 8EB7 | JR Z,Action_CheckTheObjectFlags_ReturnZero | |||
| 8EB9 | LD A,B | Use the current location again. | ||
| 8EBA | CALL TableFindAnExit | Call TableFindAnExit to find an exit. | ||
| 8EBD | LD C,A | Jump to Action_CheckTheObjectFlags_ReturnFlagValueThree if the move volume is not below the current location. | ||
| 8EBE | LD A,($8D9C) | |||
| 8EC1 | SUB C | |||
| 8EC2 | JR NC,Action_CheckTheObjectFlags_ReturnFlagValueThree | |||
| Action_CheckTheObjectFlags_ReturnZero | 8EC4 | XOR A | Return zero. | |
| 8EC5 | RET | Return. | ||
| Action_CheckTheObjectFlags_ReturnFlagValueThree | 8EC6 | LD A,$03 | The flag value to return is 03. | |
| 8EC8 | AND A | Set the flags from 03. The zero flag is clear. | ||
| 8EC9 | RET | Return. | ||
| Action_CheckTheObjectFlags_ReturnFlagValueTwo | 8ECA | LD A,$02 | The flag value to return is 02. | |
| 8ECC | AND A | Set the flags from 02. The zero flag is clear. | ||
| 8ECD | RET | Return. | ||
| Action_CheckTheObjectFlags_ReturnFlagValueOne | 8ECE | LD A,$01 | The flag value to return is 01. | |
| 8ED0 | AND A | Set the flags from 01. The zero flag is clear. | ||
| 8ED1 | RET | Return. | ||
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