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Routines |
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Used by the routine at TUNE_PLAY_NOTE.
A voice's first word is the address of the note last played, and the byte after it is the next. $40 marks a voice's end; the voice then carries on from the address in its second word (TUNE_RESTART_VOICE), which for both voices is their last note, a rest, so the tune plays once and then rests for ever.
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| TUNE_NEXT_NOTE | C026 | LD E,(HL) | DE: the address after the note last played. | |||||||||
| C027 | INC HL | |||||||||||
| C028 | LD D,(HL) | |||||||||||
| C029 | INC DE | |||||||||||
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This entry point is used by the routine at TUNE_RESTART_VOICE.
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| TUNE_NEXT_NOTE_0 | C02A | LD A,(DE) | The voice's end? | |||||||||
| C02B | CP $40 | |||||||||||
| C02D | JR Z,TUNE_RESTART_VOICE | |||||||||||
| C02F | LD (HL),D | No: DE is the voice's place now. | ||||||||||
| C030 | DEC HL | |||||||||||
| C031 | LD (HL),E | |||||||||||
| C032 | RET | |||||||||||
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