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Routines |
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| 55433 | LD A,99 | If y-coordinate of top of entity is larger than 99 (i.e. top of entity is below top of room)... | ||||||
| 55435 | CP (IX+4) | ... | ||||||
| 55438 | RET C | ...then return | ||||||
| 55439 | PUSH HL | Store HL | ||||||
| 55440 | PUSH BC | Store BC | ||||||
| 55441 | PUSH DE | Store DE | ||||||
| 55442 | LD IY,(34254) | Load start address of current level's vertical room connectivity data into IY | ||||||
| 55446 | INC IY | Advance by one byte to second byte (lower room index) of first entry | ||||||
| 55448 | LD D,(IX+0) | Load current room of entity into D | ||||||
| 55451 | LD A,(IY+0) | Load second byte (lower room index) of current entry into A | ||||||
| 55454 | CP 255 | If byte is 255 (i.e. the end marker)... | ||||||
| 55456 | JR Z,55512 | ...then skip ahead to 55512 | ||||||
| 55458 | CP D | If byte is the same as the entity's current room... | ||||||
| 55459 | JR Z,55467 | ...then skip ahead to 55467 | ||||||
| 55461 | INC IY | Advance by two bytes to the next entry... | ||||||
| 55463 | INC IY | ... | ||||||
| 55465 | JR 55451 | Loop back to 55451 | ||||||
| 55467 | LD B,(IY-1) | Load first byte (upper room index) of current entry into B | ||||||
| 55470 | LD A,(34231) | Load position (chars) of left side of current room (old, that entity is leaving) into D... | ||||||
| 55473 | LD D,A | ... | ||||||
| 55474 | CALL 54480 | Set room of entity to B, store room size data for new room and load E with entity's width minus one | ||||||
| 55477 | LD A,(34231) | Load position (chars) of left side of current room (new, that entity has entered) into A | ||||||
| 55480 | SUB D | Subtract x-coordinate of old room's left edge from x-coordinate of new room's left edge... | ||||||
| 55481 | LD D,A | ...and place result in D | ||||||
| 55482 | LD A,(IX+5) | Load A with x-coordinate of left of entity... | ||||||
| 55485 | SUB D | ...subtract difference in positions of rooms' left edges... | ||||||
| 55486 | LD (IX+5),A | ...and store | ||||||
| 55489 | ADD A,E | Update x-coordinate of right of entity by adding entity's (width - 1) value... | ||||||
| 55490 | LD (IX+7),A | ... | ||||||
| 55493 | LD A,(IX+4) | Add 22 to y-coordinate of top of entity... | ||||||
| 55496 | ADD A,22 | ... | ||||||
| 55498 | LD (IX+4),A | ... | ||||||
| 55501 | LD A,(IX+6) | Add 22 to y-coordinate of bottom of entity... | ||||||
| 55504 | ADD A,22 | ... | ||||||
| 55506 | LD (IX+6),A | ... | ||||||
| 55509 | CALL 54456 | Paint red areas outside current character's room if IX points to current character's complex state data | ||||||
| 55512 | POP DE | Restore DE | ||||||
| 55513 | POP BC | Restore BC | ||||||
| 55514 | POP HL | Restore HL | ||||||
| 55515 | RET | Return | ||||||
| Prev: 55421 | Up: Map | Next: 55516 |