Routines
Prev: 7120 Up: Map Next: 7142
7128: Get the identifier and coordinates of the blackboard closest to a character
Used by the routines at 7142, 71DC, 71E8, 7264, 7D30, F300, F650, F6AA and FA10. Returns with A holding the blackboard identifier (the LSB of 7FEC, 7FEE or 7FF0) and DE holding the coordinates:
A (D,E) Description
0xEC (155,42) Reading Room blackboard
0xEE (161,26) White Room blackboard
0xF0 (161,41) Exam Room blackboard
Input
H Character number (0xA3-0xA7)
7128 LD L,$61 Byte 0x61 of the character's buffer holds his y-coordinate
712A LD A,(HL) Pick this up in A
712B LD DE,$9B2A D=155 (y-coordinate), E=42 (x-coordinate)
712E CP $A0 Set the carry flag if the character's on the top floor
7130 LD A,$EC 0xEC=Reading Room blackboard
7132 RET C Return if the character's on the top floor
7133 INC L L=0x62
7134 LD DE,$A11A D=161 (y-coordinate), E=26 (x-coordinate)
7137 LD A,(HL) A=character's x-coordinate
7138 CP $25 This is the x-coordinate of the wall between the White and Exam Rooms
713A LD A,$EE 0xEE=White Room blackboard
713C RET C Return if the character's to the left of the wall between the White and Exam Rooms
713D LD E,$29 D=161 (y-coordinate), E=41 (x-coordinate)
713F LD A,$F0 0xF0=Exam Room blackboard
7141 RET
Prev: 7120 Up: Map Next: 7142