A cue tip chalking apparatus includes a housing that has an outer peripheral wall. If the stability criterion is satisfied, the iterations of the iterative decoding algorithm are stopped and the current block of intermediate decision bits is delivered as a block of hard decision bits. An incoming byte is received to a location within a traffic memory and the write pointer is used to instruct the traffic memory to indicate that the incoming bit has been received to the location. The pointers are retrieved and the respective frame data stored in the memory are output.