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			<title>Apple III Serial Port: Cable pinouts for NEC printers</title><body class="ac-gn-current-support">
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<h1 id="main-title">Apple III Serial Port: Cable pinouts for NEC printers</h1>
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These pinouts are for the NEC 5510/7710, 5515/7715, 5520/7720, and 5525/7725.<BR>
 <BR>
  Apple III Serial Port            Cable       Printer Connector<BR>
 <BR>
Frame Ground ............(FG)...... 1  &lt;-----&gt;  1.....(FG)<BR>
Transmit Data            (Tx) ..... 2  &lt;-----&gt;  3.....(Rx)<BR>
Receive Data             (Rx) ..... 3<BR>
Request to send          (RTS) .... 4  &lt;-----&gt;  5.....(CTS)<BR>
Clear To Send            (CTS) .... 5<BR>
Data Set Ready           (DSR) .... 6  &lt;-----&gt;  19....(SCTS)<BR>
Signal Ground ...........(SG)...... 7  &lt;-----&gt;  7.....(SG)<BR>
Data Carrier Detect      (DCD) .... 8<BR>
Secondary Clear To Send  (SCTS) ... 19<BR>
Data Terminal Ready      (DTR) .... 20 &lt;-----&gt;  6 &amp; 8.(DSR) &amp; (DCD)<BR>
 <BR>
NOTE: Printer dip switches need to be set as shown;<BR>
 <BR>
   SW1    1 - OPEN<BR>
          2 - CLOSED<BR>
          3 - OPEN<BR>
          4 - OPEN<BR>
          5 - CLOSED<BR>
          6 - OPEN<BR>
          7 - CLOSED<BR>
          8 - OPEN<BR>
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<div class="mod-date">Published Date: Feb 18, 2012</div>
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