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Routines |
Prev: 25532 | Up: Map | Next: 25691 |
Used by command lists 128, 130, 132, 134, 136, 140, 142, 144, 146, 148, 150, 152, 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 184, 186, 188, 190, 192, 198, 200, 202, 208, 212, 214, 216, 218 and 222 to make a character go to a specified place.
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25534 | LD A,(HL) | Reset bits 5 and 6 of byte 122 of the character's buffer, indicating that he should no longer walk fast or slow continuously (if he was doing so) | ||||
25535 | AND 159 | |||||
25537 | LD (HL),A | |||||
25538 | LD L,101 | Get the destination y-coordinate from the command list and place it in byte 101 of the character's buffer | ||||
25540 | CALL 24972 | |||||
25543 | LD (HL),A | |||||
25544 | INC L | Get the destination x-coordinate from the command list and place it in byte 102 of the character's buffer | ||||
25545 | CALL 24972 | |||||
25548 | LD (HL),A | |||||
This entry point is used by the routines at 27111 and 27266.
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25549 | NOP | |||||
25550 | CALL 27888 | Make the character stand up if he's not already | ||||
25553 | LD L,97 | Collect the character's x- and y-coordinates in E and D | ||||
25555 | LD D,(HL) | |||||
25556 | INC L | |||||
25557 | LD E,(HL) | |||||
25558 | LD L,101 | Bytes 101 and 102 of the character's buffer contain the destination coordinates | ||||
25560 | LD BC,25404 | Point BC at 25404 (guide character to intermediate destination) | ||||
25563 | LD A,D | A=character's y-coordinate | ||||
25564 | CP (HL) | Is the character on the same floor as his destination? | ||||
25565 | JP Z,25750 | Jump if so | ||||
25568 | CP 155 | Is the character on the top floor? | ||||
25570 | JP Z,25695 | Jump if so | ||||
25573 | CP 169 | Is the character on the bottom floor? | ||||
25575 | JP Z,25700 | Jump if so | ||||
The character is on the middle floor and is destined for another floor.
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25578 | LD A,(HL) | A=y-coordinate of destination | ||||
25579 | CP 169 | 169=bottom floor | ||||
25581 | LD A,38 | 38=x-coordinate of the wall between the White and Exam Rooms | ||||
25583 | JR NZ,25639 | Jump if the character is going to the top floor | ||||
This entry point is used by the routine at 25695 with A=57 (the x-coordinate of the wall between the Map and Reading Rooms).
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25585 | CP E | E holds the character's x-coordinate | ||||
25586 | LD A,12 | 12=x-coordinate of the tops of the staircases at the left of the skool | ||||
25588 | JR NC,25592 | Jump if the character is to the left of the wall whose x-coordinate (38 or 57) was in A | ||||
This entry point is used by the routine at 25750 when the character is on the right-middle or right-top floor and needs to go down the stairs to get to his destination.
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25590 | LD A,77 | 77=x-coordinate of the tops of the staircases at the right of the skool | ||||
This entry point is used by the routine at 25750 with A=12 (the x-coordinate of the tops of the staircases at the left of the skool) when the character is on the left-middle or left-top floors and needs to go down the stairs to get to his destination.
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25592 | CP E | Is the character at the top of the stairs he needs to descend? | ||||
25593 | JR NZ,25627 | Jump if not | ||||
25595 | LD L,96 | Byte 96 of the character's buffer holds his animatory state | ||||
25597 | BIT 0,(HL) | Is the character midstride (about to descend)? | ||||
25599 | JR NZ,25627 | Jump if so | ||||
25601 | CP 48 | Is the target staircase on the right of the skool? | ||||
25603 | JR NC,25611 | Jump if so | ||||
25605 | BIT 7,(HL) | Is the character facing left? | ||||
25607 | JR Z,25615 | Jump if so | ||||
25609 | JR 25623 | |||||
The character must go to the top of a staircase at the right of the skool.
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25611 | BIT 7,(HL) | Is the character facing left? | ||||
25613 | JR Z,25623 | Jump if so | ||||
This entry point is used by the routine at 25700.
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25615 | CALL 25108 | Update the SRB for the character's current location | ||||
25618 | XOR 128 | Turn the character round | ||||
25620 | JP 25008 | Update the character's animatory state and location and update the SRB | ||||
25623 | LD C,144 | BC=25488 (guide character down stairs) | ||||
This entry point is used by the routine at 25700.
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25625 | LD A,15 | Going up or down a staircase entails 15 movements | ||||
25627 | LD L,105 | Place the interruptible subcommand routine address in BC (25404, 25484 or 25488) into bytes 105 and 106 of the character's buffer | ||||
25629 | LD (HL),C | |||||
25630 | INC L | |||||
25631 | LD (HL),B | |||||
25632 | INC L | Byte 107 will contain either (a) the x-coordinate of the next intermediate destination (i.e. the final destination itself, or the top or bottom of the next staircase the character must negotiate first) (BC=25404), or (b) 15, that being the number of movements required to ascend or descend a staircase (BC=25484 or 25488) | ||||
25633 | LD (HL),A | |||||
25634 | INC L | Initialise byte 108 to 9; this ensures that the routine at 25404 will move the character at most 9 paces towards the destination before relinquishing control (and thus giving the routine at 25126 a chance to check whether the command list should be restarted, e.g. for a new lesson) | ||||
25635 | LD (HL),9 | |||||
25637 | PUSH BC | Make an indirect jump to 25404, 25484 or 25488 | ||||
25638 | RET | |||||
The character is on the middle floor but is destined for the top floor. At this point A=38 (the x-coordinate of the wall between the White and Exam Rooms).
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25639 | INC L | Point HL at the destination x-coordinate | ||||
25640 | CP E | |||||
25641 | LD A,57 | 57=x-coordinate of the wall between the Map and Reading Rooms | ||||
25643 | JR NC,25667 | Jump if the character is to the left of the White Room wall | ||||
25645 | CP (HL) | (HL) holds the destination x-coordinate | ||||
25646 | LD A,70 | 70=x-coordinate of the bottoms of the staircases at the right of the skool | ||||
25648 | JR NC,25590 | Jump if the destination is to the left of the Map Room wall | ||||
25650 | CP E | Is the character at the bottom of the staircase just outside the Exam Room? | ||||
25651 | JR NZ,25627 | Jump if not (to send the character there) | ||||
25653 | LD L,96 | Byte 96 of the character's buffer holds his animatory state | ||||
25655 | BIT 0,(HL) | Is the character midstride? | ||||
25657 | JR NZ,25627 | Jump if so (to finish the stride) | ||||
25659 | BIT 7,(HL) | Is the character facing left? | ||||
25661 | JR Z,25615 | Jump if so (to turn the character round) | ||||
25663 | LD C,140 | BC=25484 (guide character up stairs) | ||||
25665 | JR 25625 | |||||
The character is on the middle floor to the left of the White Room wall, and is destined for the top floor. At this point A=57 (the x-coordinate of the wall between the Map and Reading Rooms).
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25667 | CP (HL) | (HL) holds the destination x-coordinate | ||||
25668 | LD A,12 | 12=x-coordinate of the tops of the staircases at the left of the skool | ||||
25670 | JR C,25592 | Jump if the destination is to the right of the Map Room wall | ||||
25672 | LD A,19 | 19=x-coordinate of the bottoms of the staircases at the left of the skool | ||||
25674 | CP E | Is the character at the bottom of the staircase just outside the White Room? | ||||
25675 | JR NZ,25627 | Jump if not (to send the character there) | ||||
25677 | LD L,96 | Byte 96 of the character's buffer holds his animatory state | ||||
25679 | BIT 0,(HL) | Is the character midstride? | ||||
25681 | JR NZ,25627 | Jump if so (to finish the stride) | ||||
25683 | BIT 7,(HL) | Is the character facing right? | ||||
25685 | JR NZ,25615 | Jump if so (to turn the character round) | ||||
25687 | LD C,140 | BC=25484 (guide character up stairs) | ||||
25689 | JR 25625 |
Prev: 25532 | Up: Map | Next: 25691 |