1. A method of determining or confirming an error in transmitted data, comprising: receiving transmitted data and then partitioning the received data into a plurality of data lines each having a first fixed length, and a last line containing an error checking code calculated on said transmitted data; when said last line is less than said first length, appending to the last line a pad vector that is dimensioned to make the last line, including the appended pad vector, the first length; performing an error checking calculation on the plurality of data lines and on the last line including the error checking code and the pad vector to calculate an error checking result; determining a state of the calculated error checking result; and indicating an error or an absence of an error in the transmitted data based on the calculated error checking result.