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S )z� yield tuples of hex and ASCII display in multiples of 16. Includes a
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000000.000 Q-RX flushInput
000002.469 RTS inactive
000002.773 RTS active
000003.001 TX 48 45 4C 4C 4F HELLO
000003.102 RX 48 45 4C 4C 4F HELLO
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