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Routines |
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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 96 and 64.
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| SoundsWalking | 41927 | LD HL,24111 | Point HL at the walk counter at WalkCounter. | |
| 41930 | INC (HL) | Increase the counter by one. | ||
| 41931 | LD A,(HL) | Fetch the counter. | ||
| 41932 | BIT 1,A | Jump to SoundsWalkLow if bit 1 of the walk counter is not set. | ||
| 41934 | JR Z,SoundsWalkLow | |||
| 41936 | AND %00000001 | Keep only bit 0. | ||
| 41938 | RET Z | Return if the counter is even. | ||
| 41939 | LD BC,16388 | B=64 (the half period) and C=4 (the number of cycles). | ||
| 41942 | JR SoundsBeep | Jump to SoundsBeep to play the tone. | ||
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