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Routines |
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Print "You have scored ".
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| Print_Scoring | AD43 | LD HL,$0024 | HL=Messaging_YouHaveScored. | |
| AD46 | CALL PrintCompressedString | Call PrintCompressedString. | ||
| AD49 | LD HL,($A107) | HL=*Score. | ||
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Evaluate the first byte to see if it needs printing at all.
So don't show "058%" - instead show "58%".
This particular check is for the first character "1" to see if the score is printing "100%".
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| AD4C | LD A,H | Take the first scoring byte and store it in A. | ||
| AD4D | AND %00001111 | Keep only bits 0-3 and jump to Scoring_SecondDigit if the result of this is zero. | ||
| AD4F | JR Z,Scoring_SecondDigit | |||
| AD51 | ADD A,$30 | Convert the number to ASCII by adding 30 and call PrintCharacter. | ||
| AD53 | CALL PrintCharacter | |||
| Scoring_SecondDigit | AD56 | LD A,L | Load the second scoring byte into A. | |
| AD57 | AND %11110000 | Keep only bits 4-7 and jump to Scoring_PrintTens if the result is non-zero. | ||
| AD59 | JR NZ,Scoring_PrintTens | |||
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The "tens" digit is zero, so check the "hundreds" digit again to avoid printing "05%" - instead show only "5%".
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| AD5B | LD A,H | Load the first scoring byte into A again. | ||
| AD5C | AND A | Jump to Scoring_ThirdDigit if no "hundreds" digit was printed. | ||
| AD5D | JR Z,Scoring_ThirdDigit | |||
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A "hundreds" digit was printed, so force a "0" to be printed.
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| AD5F | XOR A | Load 00 into A for printing. | ||
| Scoring_PrintTens | AD60 | RRCA | Shift the bits four positions right. This moves the tens digit into the lower part of the byte for printing. | |
| AD61 | RRCA | |||
| AD62 | RRCA | |||
| AD63 | RRCA | |||
| AD64 | ADD A,$30 | Convert the number to ASCII by adding 30 and call PrintCharacter. | ||
| AD66 | CALL PrintCharacter | |||
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Lastly, always print the "units".
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| Scoring_ThirdDigit | AD69 | LD A,L | Load the second scoring byte into A. | |
| AD6A | AND %00001111 | Keep only bits 0-3. | ||
| AD6C | ADD A,$30 | Convert the number to ASCII by adding 30 and call PrintCharacter. | ||
| AD6E | CALL PrintCharacter | |||
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Print "%.".
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| AD71 | LD HL,$0025 | HL=Messaging_Percentage. | ||
| AD74 | CALL PrintCompressedStringAndNewline | Call PrintCompressedStringAndNewline. | ||
| AD77 | RET | Return. | ||
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