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Routines |
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At this point, A will hold the index of a requested sound, and RAM address 6D9A will contain the index of a pending sound. If the index of the requested sound is lower than the index of the pending sound, then the pending sound's index at 6D9A will be overwritten by the index of the requested sound in A.
Sounds with lower indices therefore take priority over sounds with higher indices.
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| D899 | OR A | If index of requested sound is zero then return. | ||
| D89A | RET Z | |||
| D89B | PUSH DE | Stash DE on the stack. | ||
| D89C | LD E,A | Load E with requested sound index. | ||
| D89D | LD A,($6D9B) | If index of pending sound is zero then skip ahead to D8A8. | ||
| D8A0 | OR A | |||
| D8A1 | JR Z,$D8A8 | |||
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Index of pending sound is not zero.
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| D8A3 | CP E | If index of requested sound is less than or equal to index of pending sound then skip ahead to D8A8. | ||
| D8A4 | JR NC,$D8A8 | |||
| D8A6 | POP DE | Restore DE from the stack. | ||
| D8A7 | RET | Return. | ||
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Index of pending sound is zero.
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| D8A8 | LD A,E | Set requested sound to be new pending sound. | ||
| D8A9 | LD ($6D9B),A | |||
| D8AC | POP DE | |||
| D8AD | RET | Return. | ||
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