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Routines |
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Used by the routine at MoveRobot.
Turns the robot a quarter of a turn, so that its direction goes down by one. The robot is moved to the start of the cell, and it gets one of the types for turning (20 to 2F).
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| TurnRobotLeft | AAD3 | RES 1,A | Clear the bit of the controls for turning left... | |||||||
| AAD5 | LD ($9625),A | ...and store them. | ||||||||
| AAD8 | LD A,(IX+$00) | Fetch the type of the robot. | ||||||||
| AADB | SUB $04 | Go back by one direction... | ||||||||
| AADD | AND $0D | |||||||||
| AADF | OR $20 | ...keep the bits that are used for the sprite and mark it as turning. | ||||||||
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This entry point is used by the routine at TurnRobotRight.
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| TurnRobot_Store | AAE1 | LD (IX+$00),A | Store the type of the robot. | |||||||
| AAE4 | LD (IX+$01),$00 | Move the robot to the start of the cell in the X direction... | ||||||||
| AAE8 | LD (IX+$03),$00 | ...and in the Y direction. | ||||||||
| AAEC | RET | Return. | ||||||||
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