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Routines |
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Used by the routine at FinishScrollIn.
Plays the sound that goes with the end of the scroll at the start of a life, which is a rising sweep of 20 beeps. The entry point at PlaySweep makes the beeps for any sweep.
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| PlayArrivalSound | 71F0 | LD C,$20 | The arrival sweep has 20 beeps. | |
| 71F2 | LD D,$70 | The lowest beep has half-period 70. | ||
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This entry point is used by the routines at PlayPickUpSound, PlayChangeSound, PlayMovingSound and PlayRemovalSound.
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| PlaySweep | 71F4 | LD A,C | The pitch starts at the number of beeps left. | |
| 71F5 | ADD A,D | Add the base pitch. | ||
| 71F6 | LD B,A | That is the half-period of this beep. | ||
| 71F7 | CALL PlaySquareWave | Call PlaySquareWave. | ||
| 71FA | DEC C | One beep of the sweep has been played. | ||
| 71FB | JR NZ,PlaySweep | Jump to PlaySweep if the zero flag is clear. | ||
| 71FD | RET | Return. | ||
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