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Routines |
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Used by the routine at MoveRobot.
Deals with the cell that has blocked the robot. If it is a battery then the cell is emptied and the battery is refilled; otherwise a beep is made.
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| HandleObstacle | 44080 | PUSH HL | Save the Y position. | |||||
| 44081 | LD HL,(38446) | Fetch the address of the cell... | ||||||
| 44084 | LD A,(HL) | ...and its contents... | ||||||
| 44085 | AND 15 | ...and keep the type. | ||||||
| 44087 | CP 3 | Jump if the cell is not a battery (type 3). | ||||||
| 44089 | JR NZ,HandleObstacle_NotBattery | |||||||
| 44091 | LD A,(HL) | Fetch the contents of the cell... | ||||||
| 44092 | AND 240 | ...and clear the type, so that the battery is gone... | ||||||
| 44094 | LD (HL),A | |||||||
| 44095 | CALL MakeBumpSound | Make a sound using MakeBumpSound. | ||||||
| 44098 | LD A,116 | Fill up the battery. | ||||||
| 44100 | LD (38459),A | |||||||
| 44103 | PUSH BC | Save BC... | ||||||
| 44104 | PUSH DE | ...and DE. | ||||||
| 44105 | LD C,70 | Flash the panel in bright yellow using SetBatteryAttributes. | ||||||
| 44107 | CALL SetBatteryAttributes | |||||||
| 44110 | POP DE | Restore DE... | ||||||
| 44111 | POP BC | ...and BC. | ||||||
| HandleObstacle_Return | 44112 | POP HL | Restore the Y position. | |||||
| 44113 | RET | Return. | ||||||
| HandleObstacle_NotBattery | 44114 | CP 15 | Jump if the cell is type 15, to undo the move. | |||||
| 44116 | JR Z,HandleObstacle_Undo | |||||||
| 44118 | CALL MakeBeep | Make a beep using MakeBeep. | ||||||
| 44121 | JR HandleObstacle_Return | Jump to return. | ||||||
| HandleObstacle_Undo | 44123 | POP HL | Discard the saved Y position. | |||||
| 44124 | LD HL,(38485) | Restore the Y position... | ||||||
| 44127 | LD DE,(38483) | ...and the X position from before the move. | ||||||
| 44131 | RET | Return. | ||||||
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