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Routines |
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Runs while the car is exploding (state 03 in the first byte of the player entity at Entity_Player). The explosion timer (the fifth byte of the entity, which starts at C0) counts down and when it reaches zero the game is over. Every four frames the sprite alternates between sprite IDs 21 and 22 (the sprites at Sprite_Explosion_1 and Sprite_Explosion_2). The only sound while the car is exploding is the engine note, as the speed is set to 01 on every frame (see SoundsEngine).
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| HandlerExplosion | 6318 | LD A,(IX+$0B) | Fetch the sprite ID of the current explosion frame from the end of the entity. | |||||||
| 631B | LD (IX+$00),A | Write A to the first byte of the entity, as this is the sprite ID that StoreEntity copies. | ||||||||
| 631E | CALL StoreEntity | Call StoreEntity to copy the position and sprite ID of the entity. | ||||||||
| 6321 | CALL FlashPlayerMarker | Call FlashPlayerMarker to keep the player's marker on the map flashing. | ||||||||
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Count down the length of the explosion.
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| 6324 | DEC (IX+$04) | Decrease the explosion timer by one and jump to GameOver if the explosion has finished. | ||||||||
| 6327 | JR Z,GameOver | |||||||||
| 6329 | LD A,(IX+$04) | Fetch the explosion timer. | ||||||||
| 632C | AND %00000011 | Keep only bits 0-1. | ||||||||
| 632E | JR NZ,HandlerExplosion_Draw | If the result is not zero then keep the same sprite and jump to HandlerExplosion_Draw. | ||||||||
| 6330 | BIT 2,(IX+$04) | If bit 2 of the explosion timer is not set then jump to HandlerExplosion_Frame2. | ||||||||
| 6334 | JR Z,HandlerExplosion_Frame2 | |||||||||
| 6336 | LD (IX+$0B),$21 | Write 21 to the sprite ID. | ||||||||
| 633A | JR HandlerExplosion_Draw | Jump to HandlerExplosion_Draw. | ||||||||
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The other frame of the explosion.
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| HandlerExplosion_Frame2 | 633C | LD (IX+$0B),$22 | Write 22 to the sprite ID. | |||||||
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Redraw the explosion.
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| HandlerExplosion_Draw | 6340 | LD A,(IX+$0B) | Fetch the sprite ID of the current explosion frame. | |||||||
| 6343 | LD (IX+$00),A | Write A to the first byte of the entity, as this is the sprite ID that DisplayEntity draws. | ||||||||
| 6346 | CALL DisplayEntity | Call DisplayEntity to erase the old sprite and draw the new one. | ||||||||
| 6349 | LD (IX+$00),$03 | Write 03 (the exploding state) to the first byte of the entity. | ||||||||
| 634D | LD A,$01 | Set the speed of the car to 01 which leaves the engine making a low note. | ||||||||
| 634F | LD ($5E0D),A | |||||||||
| 6352 | RET | Return. | ||||||||
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