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Routines |
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Copy a bit-7-terminated tune from DE into the sound buffer, working downwards from Tune_Buffer_End.
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Copy a bit-7-terminated tune from DE into the buffer.
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| QueueTune | 47548 | DI | Disable interrupts. | |||||
| 47549 | LD HL,65361 | HL=Tune_Buffer_End. | ||||||
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Copy bytes until bit 7 marks the terminator.
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| QueueTune_Copy | 47552 | LD A,(DE) | A=*DE. | |||||
| 47553 | INC DE | Increment DE by one. | ||||||
| 47554 | BIT 7,A | Jump to QueueTune_Terminator if bit 7 of A is set. | ||||||
| 47556 | JR NZ,QueueTune_Terminator | |||||||
| 47558 | LD (HL),A | Write A to *HL. | ||||||
| 47559 | DEC HL | Decrease HL by one. | ||||||
| 47560 | JR QueueTune_Copy | Jump to QueueTune_Copy. | ||||||
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Store the terminator byte with bit 7 cleared.
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| QueueTune_Terminator | 47562 | AND %01111111 | Keep only bits 0-6. | |||||
| 47564 | LD (HL),A | Write A to *HL. | ||||||
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Save the buffer pointer and enable interrupts.
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| 47565 | LD (65364),HL | Write HL to Tune_Pointer. | ||||||
| 47568 | EI | Enable interrupts. | ||||||
| 47569 | RET | Return. | ||||||
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