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Routines |
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Used by the routine at InitialiseGame.
Converts the top score into the digits shown on the telegram panel.
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| PrepareTopScoreText | A4EC | LD DE,$A5D2 | Point DE at the top score. | |
| A4EF | LD HL,$A872 | Point HL at TelegramLines_HighScoreDigits. | ||
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This entry point is used by the routines at CheckTopScore and PrintTelegram.
This entry point converts B bytes of packed decimal digits at DE into characters at HL.
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| ConvertDigits | A4F2 | LD B,$03 | Set the number of bytes to convert to three. | |
| PrepareTopScoreText_ConvertDigitsLoop | A4F4 | LD A,(DE) | Fetch a pair of digits. | |
| A4F5 | RRCA | Shift the first digit into the bottom half of the byte. | ||
| A4F6 | RRCA | |||
| A4F7 | RRCA | |||
| A4F8 | RRCA | |||
| A4F9 | AND %00001111 | Keep just the digit. | ||
| A4FB | ADD A,$30 | Convert the digit to a character. | ||
| A4FD | LD (HL),A | Write it to the text. | ||
| A4FE | INC HL | Move on to the next character. | ||
| A4FF | LD A,(DE) | Fetch the pair of digits again. | ||
| A500 | AND %00001111 | Keep just the second digit. | ||
| A502 | ADD A,$30 | Convert it to a character. | ||
| A504 | LD (HL),A | Write it to the text. | ||
| A505 | INC DE | Move on to the next pair of digits and the next character. | ||
| A506 | INC HL | |||
| A507 | DJNZ PrepareTopScoreText_ConvertDigitsLoop | Loop back until every pair has been converted. | ||
| A509 | RET | Return. | ||
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