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Routines |
| Prev: 67A9 | Up: Map | Next: 67F6 |
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Used by the routines at Handler_BulletCollisionEffects, Handler_DisplayMothershipBonus and Handler_AlienExplosions.
Adds points to the current score and awards a bonus life if the score reaches 10,000 points.
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Check if the game is running in demo mode.
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| Handler_Score | 67B6 | LD A,($66F3) | Jump to AddToScore if *Flag_ActiveDemoMode is not active. | |
| 67B9 | OR A | |||
| 67BA | JR Z,AddToScore | |||
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Demo mode is active, so just reset the score.
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| 67BC | LD DE,$6528 | DE=ScoreBuffer. | ||
| 67BF | LD B,$00 | Set B to 00 to skip any scoring addition. | ||
| 67C1 | JR Reset_ScoreBuffer | Jump to Reset_ScoreBuffer. | ||
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Proceed with adding the points to the current score.
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| AddToScore | 67C3 | LD HL,$6519 | Point HL at 6519 (the current score). | |
| 67C6 | LD DE,$652E | Point DE at 652E (the points to add). | ||
| 67C9 | LD B,$06 | Set a counter in B for 06 score digits. | ||
| AddToScore_Loop | 67CB | LD A,(DE) | Fetch the points digit and add it to the corresponding score digit. | |
| 67CC | ADD A,(HL) | |||
| 67CD | SUB $30 | Convert the value from ASCII by subtracing 30. | ||
| 67CF | CP $3A | Jump to AddToScore_Store if the result is less than 3A (no carry). | ||
| 67D1 | JR C,AddToScore_Store | |||
| 67D3 | SUB $0A | Subtract 0A to handle the carry. | ||
| 67D5 | DEC HL | Move to the next higher digit position. | ||
| 67D6 | INC (HL) | Add the carry to the next higher digit. | ||
| 67D7 | INC HL | Move back to the current digit position. | ||
| AddToScore_Store | 67D8 | LD (HL),A | Write the resulting digit to the score. | |
| 67D9 | DEC DE | Move to the previous points digit in the points buffer. | ||
| 67DA | DEC HL | Move to the previous digit in the score. | ||
| 67DB | DJNZ AddToScore_Loop | Decrease the score digit counter by one and loop back to AddToScore_Loop until all of the scoring digits have been processed. | ||
| Reset_ScoreBuffer | 67DD | PUSH DE | Copy the score buffer pointer to HL (using the stack). | |
| 67DE | POP HL | |||
| 67DF | INC DE | Increment the score buffer destination pointer by one. | ||
| 67E0 | LD C,$06 | Set a counter in C for 06 score digits. | ||
| 67E2 | LD (HL),$30 | Write 30 ("0") to the score buffer. | ||
| 67E4 | LDIR | Copy 30 ("0") across the remaining five score buffer digits. | ||
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Check if the score is at least "10,000".
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| 67E6 | LD A,($6515) | Return if *6515 (the "ten-thousands" digit) is not equal to 31 ("1"). | ||
| 67E9 | CP $31 | |||
| 67EB | RET NZ | |||
| 67EC | LD HL,$66EF | Return if Flag_ExtraLife says that no extra life should be awarded. | ||
| 67EF | LD A,(HL) | |||
| 67F0 | OR A | |||
| 67F1 | RET Z | |||
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Award an extra life to the player.
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| 67F2 | DEC (HL) | Reset Flag_ExtraLife as an extra life has been "awarded". | ||
| 67F3 | INC HL | Move to the lives counter at Player_Lives. | ||
| 67F4 | INC (HL) | Award one extra life. | ||
| 67F5 | RET | Return. | ||
| Prev: 67A9 | Up: Map | Next: 67F6 |