Routines| D | y-coordinate of play area |
| E | x-coordinate of play area |
| 189 | Top floor, left of left study door in boys' skool |
| 190 | Middle floor, left of far wall of science lab storeroom |
| 191 | Anywhere on bottom floor (or in mid-air!) |
| 192 | Assembly hall stage |
| 193 | Near middle-floor window in boys' skool |
| 194 | Top floor, right of left study door in boys' skool |
| 195 | Middle floor, girls' skool |
| 196 | Top floor, girls' skool |
| 0 | None of the places below |
| 1 | Playground |
| 2 | Various places in boys' skool outside classrooms |
| 3 | Assembly hall |
| 4 | Dining hall |
| 5 | Revision library, just outside yellow room door |
| 6 | Science lab |
| 7 | Blue room |
| 8 | Yellow room |
| 25554 | CDA36D | CALL 28067 | Divert back to the calling routine with the carry flag reset if the character is on the assembly hall stage |
| 25557 | 7A | LD A,D | D contains the y-coordinate |
| 25558 | 04 | INC B | Set B to 183 (186) if D≤6 (top floor), 184 (187) if 7≤D≤13 (middle floor), or 185 (188) if 14≤D≤18 (bottom floor) |
| 25559 | D607 | SUB 7 | |
| 25561 | 30FB | JR NC,25558 | |
| 25563 | FEFC | CP 252 | Does D=3, 10 or 17 (top, middle, bottom floor)? |
| 25565 | 2804 | JR Z,25571 | Jump if so |
| 25567 | 37 | SCF | Signal: D does not correspond exactly to top, middle or bottom floor |
| 25568 | 00 | NOP | |
| 25569 | 00 | NOP | |
| 25570 | 00 | NOP | |
| 25571 | F5 | PUSH AF | Save carry flag temporarily (note: C=59) |
| 25572 | 0C | INC C | |
| 25573 | 0A | LD A,(BC) | |
| 25574 | 0C | INC C | |
| 25575 | BB | CP E | |
| 25576 | 38FA | JR C,25572 | |
| 25578 | F1 | POP AF | Restore the carry flag (reset if D=3, 10 or 17; set otherwise) |
| 25579 | 0A | LD A,(BC) | A holds value in range 189-196 or 0-8 (see tables above) |
| 25580 | C9 | RET |
| C=60 | C=62 | C=64 | C=66 | C=68 | |||||||
| x | A | x | A | x | A | x | A | x | A | ||
| B=183 | 72 | 189 | 96 | 194 | 159 | 191 | 224 | 196 | top floor | ||
| B=184 | 63 | 190 | 76 | 191 | 96 | 193 | 159 | 191 | 224 | 195 | middle floor |
| B=185 | 224 | 191 | bottom floor | ||||||||
| C=60 | C=62 | C=64 | C=66 | C=68 | C=70 | ||||||||
| x | A | x | A | x | A | x | A | x | A | x | A | ||
| B=186 | 23 | 7 | 29 | 2 | 40 | 5 | 63 | 8 | 224 | 0 | top floor | ||
| B=187 | 30 | 2 | 53 | 6 | 224 | 0 | middle floor | ||||||
| B=188 | 42 | 2 | 63 | 4 | 77 | 3 | 96 | 2 | 159 | 1 | 224 | 0 | bottom floor |