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Routines |
| Prev: A3C2 | Up: Map | Next: A3D8 |
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Plays a footstep. The walk counter is increased each time this is called. A tone is only played when the counter is odd, which makes it every other call, and the half period alternates between 60 and 40.
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| SoundsWalking | A3C7 | LD HL,$5E2F | Point HL at the walk counter at WalkCounter. | |
| A3CA | INC (HL) | Increase the counter by one. | ||
| A3CB | LD A,(HL) | Fetch the counter. | ||
| A3CC | BIT 1,A | Jump to SoundsWalkLow if bit 1 of the walk counter is not set. | ||
| A3CE | JR Z,SoundsWalkLow | |||
| A3D0 | AND %00000001 | Keep only bit 0. | ||
| A3D2 | RET Z | Return if the counter is even. | ||
| A3D3 | LD BC,$4004 | B=40 (the half period) and C=04 (the number of cycles). | ||
| A3D6 | JR SoundsBeep | Jump to SoundsBeep to play the tone. | ||
| Prev: A3C2 | Up: Map | Next: A3D8 |