{HEAD ~ Data} is transmitted to the printer under control of the microprocessor 30 through {TAIL ~ a dual 4 bit latch} 62 and the buffers 64,66 
{ HEAD ~ Data } is transmitted to the printer under control of the microprocessor 30 through { TAIL ~ a dual 4 bit latch } 62 and the buffers 64,66
HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH