Routines 
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Used by the routines at 28994, 29148, 29160, 29284, 32048, 62208, 63056, 63146 and 64016. Returns with A holding the blackboard identifier (the LSB of 32748, 32750 or 32752) and DE holding the coordinates:


28968  LD L,97  Byte 97 of the character's buffer holds his ycoordinate  
28970  LD A,(HL)  Pick this up in A  
28971  LD DE,39722  D=155 (ycoordinate), E=42 (xcoordinate)  
28974  CP 160  Set the carry flag if the character's on the top floor  
28976  LD A,236  236=Reading Room blackboard  
28978  RET C  Return if the character's on the top floor  
28979  INC L  L=98  
28980  LD DE,41242  D=161 (ycoordinate), E=26 (xcoordinate)  
28983  LD A,(HL)  A=character's xcoordinate  
28984  CP 37  This is the xcoordinate of the wall between the White and Exam Rooms  
28986  LD A,238  238=White Room blackboard  
28988  RET C  Return if the character's to the left of the wall between the White and Exam Rooms  
28989  LD E,41  D=161 (ycoordinate), E=41 (xcoordinate)  
28991  LD A,240  240=Exam Room blackboard  
28993  RET 
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