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Routines |
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Used by the routine at UpdateShipSpeeds.
Keeps the vertical speed of the ship within its limits: no faster than FD downwards, and no faster than half the value at VerticalLimit upwards.
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| LimitVerticalSpeed | B322 | LD A,H | A=H. | |||||||||
| B323 | BIT 7,A | Jump to LimitVerticalSpeed_Up if bit 7 of A is clear. | ||||||||||
| B325 | JR Z,LimitVerticalSpeed_Up | |||||||||||
| B327 | CP $FE | Return if A is FE or more. | ||||||||||
| B329 | RET NC | |||||||||||
| B32A | LD H,$FD | H=FD. | ||||||||||
| B32C | RET | Return. | ||||||||||
| LimitVerticalSpeed_Up | B32D | LD A,($5C3F) | The vertical scroll limit. | |||||||||
| B330 | SRL A | Shift A right. | ||||||||||
| B332 | CP H | Return if A is H or more. | ||||||||||
| B333 | RET NC | |||||||||||
| B334 | LD H,A | H=A. | ||||||||||
| B335 | RET | Return. | ||||||||||
| Prev: B320 | Up: Map | Next: B336 |