| Unused

71E1: Unused

Code remnants in the routine at 71DC. If this code were still in use, it would make the teacher skip wiping the board if it was already clean.
71E1 | DEFB $7F | This was probably the operand of 'LD B,$7F'
71E2 | INC C | C=1 + blackboard identifier
71E3 | LD A,(BC) | A=number of the character who last wrote on the board
71E4 | AND A | Is the board clean?
71E5 | JP Z,$62A4 | Terminate this interruptible subcommand if so (there is nothing to wipe)