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Routines |
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Used by the routine at FireProjectile.
Makes the sound of a projectile that has been fired, from thirty-two single cycles of a tone whose pitch changes each cycle, in a way that depends on the value that B has when the routine is called.
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Play thirty-two cycles of a changing tone.
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| PlayProjectileSound | D629 | LD C,$20 | Set the number of cycles to 20. | |||||
| PlayProjectileSound_Loop | D62B | LD A,C | Fetch the number of cycles left. | |||||
| D62C | SUB B | Take away the pitch. | ||||||
| D62D | LD B,A | Set it as the new pitch. | ||||||
| D62E | CALL PlaySquareWave | Call PlaySquareWave to make a cycle of the tone. | ||||||
| D631 | DEC C | Count the cycle. | ||||||
| D632 | JR NZ,PlayProjectileSound_Loop | Jump to PlayProjectileSound_Loop until all of the cycles have been made. | ||||||
| D634 | RET | Return. | ||||||
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View the equivalent code in;
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| Prev: D615 | Up: Map | Next: D635 |