| Unused

BC74: Unused

These bytes are probably remnants of location descriptor tables.
BC74 | DEFB $FF |
BC75 | DEFB $7A,$8C | y=33, z=2; left, down/left, down/right
BC77 | DEFB $FF | End marker
BC78 | DEFB $2C,$24 | y=26, z=1; up/left, down/right
BC7A | DEFB $30,$18 | y=28, z=1; up/right, down/left
BC7C | DEFB $34,$24 | y=30, z=1; up/left, down/right
BC7E | DEFB $FF | End marker
BC7F | DEFB $00 |