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Routines |
| Prev: B1A9 | Up: Map | Next: B21E |
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Used by the routine at Process_Falling_Entities.
Advance Falling Entity walking the entity tables at StateData_SimpleEntities / StateData_Boney.
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| Advance_Falling_Entity | B1E3 | CALL Test_EntityOverlap | Call Test_EntityOverlap to test Entity Overlap? If so, jump to Advance_Falling_Entity_LowerY. | |||||
| B1E6 | JR C,Advance_Falling_Entity_LowerY | |||||||
| B1E8 | CP $21 | Is A equal to 21? If not, jump to Advance_Falling_Entity_LowerY. | ||||||
| B1EA | JR NZ,Advance_Falling_Entity_LowerY | |||||||
| B1EC | LD A,($72B5) | Load A with the task-two flags (TaskTwoFlags). | ||||||
| B1EF | SET 1,A | Set "task-two script should advance" (bit 01 of TaskTwoFlags). | ||||||
| B1F1 | LD ($72B5),A | Set the task-two flags (TaskTwoFlags). | ||||||
| B1F4 | XOR A | Clear A as a false / no-match result. | ||||||
| B1F5 | RET | Return. | ||||||
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Lower the falling entity one character; keep falling, or relocate it when it reaches the floor band.
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| Advance_Falling_Entity_LowerY | B1F6 | DEC (IX+$05) | Move this entity one character up. | |||||
| B1F9 | DEC (IX+$06) | |||||||
| B1FC | LD A,(IX+$06) | Load A with the current entity's y-extent. | ||||||
| B1FF | CP $0C | Is the current entity's y-extent less than 0C? If so, jump to Advance_Falling_Entity_RelocateAtFloor. | ||||||
| B201 | JR C,Advance_Falling_Entity_RelocateAtFloor | |||||||
| B203 | SET 2,(HL) | Set the falling-entity latch (bit 02 of GameEventFlags). | ||||||
| B205 | SCF | Signal success. | ||||||
| B206 | RET | Return. | ||||||
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Snap the fallen entity into room 03 at floor x 6D and finish the fall.
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| Advance_Falling_Entity_RelocateAtFloor | B207 | LD (IX+$04),$03 | Write 03 to the current entity's room index. | |||||
| B20B | LD A,(IX+$08) | Load A with the current entity's x-extent. | ||||||
| B20E | SUB (IX+$07) | Subtract the current entity's x-coordinate from A. | ||||||
| B211 | LD C,A | Keep the current entity's x-extent in C for later. | ||||||
| B212 | LD A,$6D | Load A with floor x-coordinate 6D. | ||||||
| B214 | LD (IX+$07),A | Set the current entity's x-coordinate. | ||||||
| B217 | ADD A,C | Add the saved count in C to A. | ||||||
| B218 | LD (IX+$08),A | Set the current entity's x-extent. | ||||||
| B21B | POP BC | Restore BC from the stack. | ||||||
| B21C | JR Process_Falling_Entities_ClearFallBits | Jump to Process_Falling_Entities_ClearFallBits to finish the falling-entity pass. | ||||||
| Prev: B1A9 | Up: Map | Next: B21E |