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Routines |
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The handler of the sound entity for the sound set up by SoundsTouching. The count in the second byte of the entity is decreased on each pass of the main loop. When the count reaches zero the entity is cleared. Until then it plays a tone of as many cycles as the count, with a half period of the count exclusive ORed with 43 so the pitch changes as the count falls.
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| SoundEffect | A3EF | DEC (IX+$01) | Decrease the count of notes, and jump to ClearSound if there are none left. | |||||
| A3F2 | JR Z,ClearSound | |||||||
| A3F4 | LD A,(IX+$01) | Fetch the count and keep the number of cycles in C. | ||||||
| A3F7 | LD C,A | |||||||
| A3F8 | XOR %01000011 | Combine the count with 43 to make the half period. | ||||||
| A3FA | LD B,A | Keep the half period in B. | ||||||
| A3FB | JP SoundsBeep | Jump to SoundsBeep to play the tone. | ||||||
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View the equivalent code in;
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