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The two images, HEX-Output and Teletype Faulty Linefeed were created to demonstrate a problem I was experiencing with D0 from the reader. The HEX listing shows OD OA OA because I had the terminal program add an extra OA (Line Feed) character to the log output. This was done to prevent the lines from being overwritten. The Teletype faulty linefeed shows what the oscilloscope picked up each time a line feed (OA) was being misinterpreted by the teletype as OB (do nothing). The result was no Line Feed performed.