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Routines |
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Used by the routine at GamePlayEntry.
Makes the score label of the active player ("1UP" or "2UP") flash. This is done while the delay before Charlie appears is running (see GamePlayEntry).
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| ScoreLabelFlash | 28704 | LD A,(24353) | Fetch the active player (0 for 1UP, 255 for 2UP). | |||||
| 28707 | AND A | If the current player is 2UP then jump to FlashScoreLabel2UP. | ||||||
| 28708 | JR NZ,FlashScoreLabel2UP | |||||||
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Flash 1UP score label.
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| 28710 | LD HL,24 | HL=000,024 (position of the 1UP score label). | ||||||
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Set flash state for the 3-attributes of the score label.
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| FlashText | 28713 | CALL AttributeAddress | Calculate the attribute buffer address using AttributeAddress. | |||||
| 28716 | LD B,3 | Set the letter counter to 3 (the three letters in a score label). | ||||||
| FlashText_Loop | 28718 | LD A,(HL) | Fetch the attribute byte. | |||||
| 28719 | OR %10000000 | Ensure bit 7 is set (the flash bit). | ||||||
| 28721 | LD (HL),A | Write the attribute byte back. | ||||||
| 28722 | INC HL | Move on to the next attribute. | ||||||
| 28723 | DJNZ FlashText_Loop | Decrease the letter counter by one and loop back to FlashText_Loop until all three letters have been done. | ||||||
| 28725 | RET | Return. | ||||||
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This entry point is used by the routine at GamePlayEntry.
Unset flash state for the 3-attributes of the score label.
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| UnsetFlashText | 28726 | CALL AttributeAddress | Calculate the attribute buffer address using AttributeAddress. | |||||
| 28729 | LD B,3 | Set the letter counter to 3 (the three letters in a score label). | ||||||
| UnsetFlashText_Loop | 28731 | LD A,(HL) | Fetch the attribute byte. | |||||
| 28732 | AND %01111111 | Keep only bits 0-6 (i.e. everything except the flash bit). | ||||||
| 28734 | LD (HL),A | Write the attribute byte back. | ||||||
| 28735 | INC HL | Increase the attribute pointer by one. | ||||||
| 28736 | DJNZ UnsetFlashText_Loop | Decrease the letter counter by one and loop back to UnsetFlashText_Loop until all three letters have been done. | ||||||
| 28738 | RET | Return. | ||||||
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Flash 2UP score label.
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| FlashScoreLabel2UP | 28739 | LD HL,216 | HL=000,216 (position of the 2UP score label). | |||||
| 28742 | JR FlashText | Jump to FlashText. | ||||||
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View the equivalent code in;
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