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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 | 42220 | LD DE,42450 | Point DE at the top score. | |
| 42223 | LD HL,43122 | 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 | 42226 | LD B,3 | Set the number of bytes to convert to three. | |
| PrepareTopScoreText_ConvertDigitsLoop | 42228 | LD A,(DE) | Fetch a pair of digits. | |
| 42229 | RRCA | Shift the first digit into the bottom half of the byte. | ||
| 42230 | RRCA | |||
| 42231 | RRCA | |||
| 42232 | RRCA | |||
| 42233 | AND %00001111 | Keep just the digit. | ||
| 42235 | ADD A,48 | Convert the digit to a character. | ||
| 42237 | LD (HL),A | Write it to the text. | ||
| 42238 | INC HL | Move on to the next character. | ||
| 42239 | LD A,(DE) | Fetch the pair of digits again. | ||
| 42240 | AND %00001111 | Keep just the second digit. | ||
| 42242 | ADD A,48 | Convert it to a character. | ||
| 42244 | LD (HL),A | Write it to the text. | ||
| 42245 | INC DE | Move on to the next pair of digits and the next character. | ||
| 42246 | INC HL | |||
| 42247 | DJNZ PrepareTopScoreText_ConvertDigitsLoop | Loop back until every pair has been converted. | ||
| 42249 | RET | Return. | ||
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