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Routines |
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Used by the routine at AcceleratePlayer.
Limits a velocity to the top speed of the player, which depends on the colour of the player. The top speed is 20 for red (INK:RED, PAPER:BLACK (BRIGHT)), 40 for cyan (INK:CYAN, PAPER:BLACK (BRIGHT)) and 30 otherwise. The velocity may be negative.
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| LimitPlayerVelocity | AFC1 | PUSH AF | Stash the velocity on the stack. | |||||||||||
| AFC2 | LD A,(IX+$05) | Fetch the colour of the player. | ||||||||||||
| AFC5 | CP $42 | Jump to SetSlowSpeedLimit if the player is red (INK:RED, PAPER:BLACK (BRIGHT)), which slows the player. | ||||||||||||
| AFC7 | JR Z,SetSlowSpeedLimit | |||||||||||||
| AFC9 | CP $45 | Jump to SetFastSpeedLimit if the player is cyan (INK:CYAN, PAPER:BLACK (BRIGHT)), which speeds the player up. | ||||||||||||
| AFCB | JR Z,SetFastSpeedLimit | |||||||||||||
| AFCD | LD B,$30 | Set the normal maximum speed in B to 30. | ||||||||||||
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This entry point is used by the routines at SetSlowSpeedLimit and SetFastSpeedLimit.
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| LimitPlayerVelocity_Restore | AFCF | POP AF | Restore the velocity from the stack. | |||||||||||
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