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Routines |
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Used by the routine at GameMenu.
Plays a tune, but only the first time that it is used, and stops if a key is pressed. The tune is a list of notes that ends with 255. See PlayNote for what the notes are. After the tune has been played, nothing happens until TunePlayedFlag is cleared.
The tunes played by this routine are:
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| PlayMusic_WaitKey | 49334 | LD HL,38455 | Point HL at the flag that records that a tune has been played. | |||||||||
| 49337 | LD A,(HL) | Fetch the flag. | ||||||||||
| 49338 | AND A | Return if the tune has already been played. | ||||||||||
| 49339 | RET NZ | |||||||||||
| 49340 | SET 0,(HL) | Set the flag. | ||||||||||
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Select every half row of the keyboard.
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| PlayMusic_WaitKey_Loop | 49342 | XOR A | Read every row of the keyboard. | |||||||||
| 49343 | CALL ReadKeys | |||||||||||
| 49346 | JR Z,PlayMusic_WaitKey_Next | Jump to PlayMusic_WaitKey_Next if no key is pressed. | ||||||||||
| 49348 | RET | Return as a key has been pressed. | ||||||||||
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Play the next note.
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| PlayMusic_WaitKey_Next | 49349 | LD A,(DE) | Fetch the next note. | |||||||||
| 49350 | CP 255 | Jump to PlayMusic_Return if the terminator has been reached. | ||||||||||
| 49352 | JR Z,PlayMusic_Return | |||||||||||
| 49354 | CALL PlayNote | Play the note using PlayNote. | ||||||||||
| 49357 | JR PlayMusic_WaitKey_Loop | Loop back for the next note. | ||||||||||
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View the equivalent code in;
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