From: bruce#fanboy.net@127.0.0.1   
      
   In article ,   
    Relic  wrote:   
      
   > I have a few of these, but only one has a 9-pin ext   
   > input. Was curious about it, and I haven't found anything   
   > on-line about it. Was there anything that used it?   
      
   It was meant for the modem that was only released in Japan.   
      
   Electrically, it's identical to the two controller ports in front,   
   except for the connector being of opposite gender. Note that all the   
   ports can operate in serial mode, selectable between 300, 1200, 2400,   
   and 4800 baud.   
      
   And for what it's worth, the TMSS lockout system was added before they   
   stopped installing the EXT port connector. A few more revisions later,   
   Sega removed the EXT port from the circuit board entirely.   
      
   --- SoupGate-Win32 v1.05   
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