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Routines |
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| F503 | LD A,$FF | Turn off the second platform, active when the trolley is moving. (AF7C) | ||
| F505 | LD ($AF80),A | |||
| F508 | LD A,$0C | Is flag 0C (trolley oiled) set? | ||
| F50A | CALL $EC1D | |||
| F50D | JR Z,$F543 | Jump forward if it isn't. | ||
| F50F | LD A,$06 | Touching a moving object drops endurance by 6. | ||
| F511 | LD ($F26E),A | |||
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If the trolley is oiled, it needs moving.
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| F514 | LD IX,$F4FF | Point IX at the movement table. | ||
| F518 | LD BC,$F2F7 | Point DE at the bounds table. | ||
| F51B | CALL $EF35 | Update moving objects. | ||
| F51E | LD A,$36 | Set the ID to the trolley graphic. (8A38) | ||
| F520 | CALL $A8A0 | Draw the graphic. | ||
| F523 | CALL $E329 | Check for collision detection. | ||
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See if we have jumped onto the trolley.
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| F526 | LD A,(IY+$0A) | Get the Y co-ordinate? | ||
| F529 | CP $88 | Is it 88 ie: jumped to the height of the trolley? | ||
| F52B | RET NZ | Return if it hasn't. | ||
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The Y co-ordinate is correct, check the X co-ordinate.
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| F52C | LD A,(IY+$05) | Get the current X co-ordinate. | ||
| F52F | SUB (IX-$04) | Is it close enough to the X co-ordinate of the trolley? | ||
| F532 | SUB $04 | |||
| F534 | CP $F8 | |||
| F536 | RET C | Return if it isn't. | ||
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The character has landed on top of a moving trolley. Switch on a byte in the platform table (AF7C) that will treat this as a temporary platform and allow them to jump higher.
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| F537 | LD A,(IX-$04) | Set the X co-ordinate to match that of the trolley. | ||
| F53A | LD (IY+$05),A | |||
| F53D | LD A,$A8 | Set the top of the trolley as an active platform. | ||
| F53F | LD ($AF80),A | |||
| F542 | RET | Return. | ||
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The trolley's not oiled, so just draw it.
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| F543 | LD HL,$A8F0 | Set the position. | ||
| F546 | LD ($A838),HL | |||
| F549 | LD A,$36 | Set the ID to the trolley graphic. | ||
| F54B | CALL $A8A0 | Draw it and return. | ||
| F54E | RET | |||
| Prev: F4FF | Up: Map | Next: F54F |