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Routines |
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Used by the routine at HandlerAccelerate.
Moves the car to a lower X position. If it would go below the start of the map then it bounces off the edge instead.
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| SubtractX | 6E32 | EX DE,HL | HL=X position. | |
| 6E33 | AND A | Subtract the result of the multiplication from the X position. | ||
| 6E34 | SBC HL,DE | |||
| 6E36 | SBC A,$00 | Borrow from the top byte. | ||
| 6E38 | JR NZ,HandlerAccelerate_StoreX | Jump to HandlerAccelerate_StoreX if the top byte is not zero. | ||
| 6E3A | EX AF,AF' | Switch to the shadow flags. | ||
| 6E3B | LD A,H | A=H. | ||
| 6E3C | CP $80 | Jump to BounceX if the position is below 80 in the second byte. | ||
| 6E3E | JR C,BounceX | |||
| 6E40 | EX AF,AF' | Switch back. | ||
| 6E41 | JR HandlerAccelerate_StoreX | Jump to HandlerAccelerate_StoreX. | ||
| Prev: 6E19 | Up: Map | Next: 6E43 |