Routines
Prev: 28657 Up: Map Next: 28672
28658: Collect the identifier and coordinates of a blackboard that will be wiped
Used by the routine at 26639 to collect information about the blackboard that is going to be wiped by a teacher. Returns with B holding the blackboard identifier (the LSB of 32596, 32602, 32608, 32614 or 32620), and DE holding the coordinates of the top left-hand square of the board.
Input
H Teacher's character number (201-204)
28658 LD A,12 Change the instruction at 26476 to ADD A,12 (for the purpose of this routine, a teacher is considered to be standing next to a blackboard if he's within 12 spaces to the right of its left edge)
28660 LD (26477),A
28663 CALL 26453 Collect information about the blackboard the teacher is standing next to
28666 LD A,4 Change the instruction at 26476 back to ADD A,4
28668 LD (26477),A
28671 RET
Prev: 28657 Up: Map Next: 28672