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Routines |
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Used by the routine at HandlerSleepingHippoWarthog.
Wakes up a hippo or a warthog by resetting bit 2 of the sprite ID. Bit 3 of the sprite ID is set from bit 3 of the random seed, which makes it a warthog (set) or a hippo (reset).
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| WakeAnimal | 40710 | LD A,(38549) | Fetch the random seed from RandomNumber. | |||||
| 40713 | AND %00001000 | Keep only bit 3. | ||||||
| 40715 | LD C,A | Stash bit 3 of the random seed in C. | ||||||
| 40716 | LD A,(IX+0) | Fetch the sprite ID of the animal. | ||||||
| 40719 | AND %11110011 | Keep only bits 0-1 and 4-7. | ||||||
| 40721 | OR C | Merge in bit 3 from the random seed. | ||||||
| 40722 | LD (IX+0),A | Store the new sprite ID of the animal. | ||||||
| 40725 | RET | Return. | ||||||
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