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Routines |
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Used by the routine at 51359.
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Play/trigger sounds for creature footsteps and check if any creatures are being destroyed by Maroc's spells or servant-wielded weapons.
Trigger footstep sound effect (for certain creatures):
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| 52616 | LD A,(60572) | Check FREEZE spell timer counter | ||
| 52619 | CP 0 | |||
| 52621 | JR NZ,52646 | If it's > 0, the FREEZE spell is still in place so skip the footsteps check | ||
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Create short intervals between footsteps
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| 52623 | LD A,(60074) | Game timer | ||
| 52626 | AND 3 | Check if either bit 0 or 1 are set | ||
| 52628 | JR NZ,52646 | If so, skip the footstep sounds (this creates a short interval in the sound, to mimic a footstep effect) | ||
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Check creature type (60230). Prepare footstep sound effects for Guardian of Chaos (creature type = 8), goblin warrior (9), and goblin missile thrower (10).
Warlocks (1-7), wraiths (11) and demons (12) make no sound when they move.
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| 52630 | LD A,(60230) | Check creature type number | ||
| 52633 | CP 8 | |||
| 52635 | JR C,52646 | Creature number < 8 - warlock | ||
| 52637 | CP 11 | |||
| 52639 | JR NC,52646 | Creature number >= 11 - a wraith or a demon | ||
| 52641 | LD A,16 | If the creature type is 8, 9, or 10, set the byte at 60246 to start with the speaker bit on (bit 4). | ||
| 52643 | LD (60246),A | |||
| 52646 | LD HL,(60228) | Pointer to data set at 27772/27828 | ||
| 52649 | LD BC,8 | Copy 8 bytes to creature data buffer at 60325 | ||
| 52652 | LD DE,60325 | |||
| 52655 | LDIR | |||
| 52657 | LD A,(60325) | Creature attribute/colour byte - first byte of current creature set at 27828 | ||
| 52660 | LD (60072),A | Copy into room item working data buffer | ||
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Check if any creatures have been destroyed (e.g. by a missile fired by Maroc)
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| 52663 | LD A,(60238) | Item (creature) properties byte | ||
| 52666 | LD C,A | Temp store in C register | ||
| 52667 | AND 224 | Check top 3 bits (bits 5-7) If any of these are set, it means the creature is disintegrating or materializing |
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| 52669 | JP NZ,53145 | If so, don't run any more checks for this creature - skip out of this routine | ||
| 52672 | LD A,C | Retrieve item/creature properties byte | ||
| 52673 | AND 1 | Check bit 0 - if set, it means the creature is on-screen/visible | ||
| 52675 | JR Z,52695 | Skip the next instructions if creature isn't visible on-screen as creatures need to be on-screen to be destroyed by missiles etc. | ||
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Run collision checks for Maroc's spells vs creatures
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| 52677 | LD A,(60329) | Collision/event check type (wraiths/demons = 7, other creatures = 3) This indicates which spells or weapons can destroy these sorts of creature For warlocks this is a value matching the missile/bolt type that destroys them (from byte 5 in the warlock table at 27772) |
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| 52680 | LD C,A | Store in C register, which is used as the event value to check in the following CALL | ||
| 52681 | CALL 57293 | Check if Maroc has destroyed a creature with a missile/bolt or wraithbane | ||
| 52684 | CP 0 | The A register is returned with 0 (no collision) or 1 (positive collision detected) | ||
| 52686 | JP NZ,53372 | Positive collision (flag = 1), e.g. a wraith touching Maroc while WRAITHBANE is active, or a missile hitting a creature that it destroys - so destroy the creature. | ||
| 52689 | LD A,(60330) | Otherwise get event/collision value for for creatures opening/closing doors (17) | ||
| 52692 | CALL 58032 | ...and add this to the collision/event set in the table at 32691 ready for checking next game cycle | ||
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