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Routines |
| Prev: A623 | Up: Map | Next: A692 |
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Used by the routine at RunFrame.
Makes an entity of the type 05 (see UpdatePuffEntity) at the position of another entity, using one of the two hidden entities from B5FE, and plays a buzz. Does nothing if both entities are in use.
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| CreatePuff | A630 | LD IY,$B5FE | Point IY at the first of the two entities which can be used. | |||||
| A634 | LD B,$02 | Look at 02 entities. | ||||||
| A636 | CALL FindHiddenEntity | Call FindHiddenEntity to find a hidden entity. | ||||||
| A639 | RET Z | Return if there is not one. | ||||||
| A63A | LD (IY+$01),$00 | Set the frame of the new entity to 00. | ||||||
| A63E | LD (IY+$00),$05 | Set the type of the new entity to 05. | ||||||
| A642 | LD H,(IX+$02) | Fetch the first byte of the first coordinate of the other entity. | ||||||
| A645 | LD L,(IX+$03) | Fetch the second byte of the first coordinate of the other entity. | ||||||
| A648 | LD E,(IX+$0B) | Fetch the first size of the other entity. | ||||||
| A64B | LD D,$00 | Clear D. | ||||||
| A64D | SRL E | Halve the size. | ||||||
| A64F | DEC E | Subtract one. | ||||||
| A650 | ADD HL,DE | Add it to the first coordinate, to find the middle. | ||||||
| A651 | LD (IY+$02),H | Store the first byte of the first coordinate of the new entity. | ||||||
| A654 | LD (IY+$03),L | Store the second byte of the first coordinate of the new entity. | ||||||
| A657 | LD H,(IX+$05) | Fetch the first byte of the second coordinate of the other entity. | ||||||
| A65A | LD L,(IX+$06) | Fetch the second byte of the second coordinate of the other entity. | ||||||
| A65D | LD E,(IX+$0C) | Fetch the second size of the other entity. | ||||||
| A660 | SRL E | Halve the size. | ||||||
| A662 | DEC E | Subtract one. | ||||||
| A663 | ADD HL,DE | Add it to the second coordinate, to find the middle. | ||||||
| A664 | LD (IY+$05),H | Store the first byte of the second coordinate of the new entity. | ||||||
| A667 | LD (IY+$06),L | Store the second byte of the second coordinate of the new entity. | ||||||
| A66A | LD H,(IX+$08) | Fetch the first byte of the third coordinate of the other entity. | ||||||
| A66D | LD L,(IX+$09) | Fetch the second byte of the third coordinate of the other entity. | ||||||
| A670 | LD E,(IX+$0D) | Fetch the third size of the other entity (which is not used). | ||||||
| A673 | LD E,$00 | Set the offset to 00. | ||||||
| A675 | ADD HL,DE | Add it to the third coordinate. | ||||||
| A676 | INC HL | Add one. | ||||||
| A677 | LD (IY+$08),H | Store the first byte of the third coordinate of the new entity. | ||||||
| A67A | LD (IY+$09),L | Store the second byte of the third coordinate of the new entity. | ||||||
| A67D | LD A,(IX+$11) | Fetch the heading of the other entity. | ||||||
| A680 | LD (IY+$11),A | Copy it to the new entity. | ||||||
| A683 | LD (IY+$10),$88 | Set field 10 of the new entity to 88. | ||||||
| A687 | LD (IY+$1B),$40 | Set field 1B of the new entity to 40. | ||||||
| A68B | LD (IY+$17),$06 | Set field 17 of the new entity to 06. | ||||||
| A68F | JP PlayShortBuzz | Jump to PlayShortBuzz to play a buzz. | ||||||
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