ICCIIV.7
          
               The computer interface allows you to do such things as:
          
          -    Set and read the frequency and modulation mode
          
          -    Set VFO A, VFO B, or memory mode
          
          -    Select memory channel
          
          -    Store displayed frequency into memory
          
          -    Transfer displayed memory-mode frequency to a VFO
          
               Even without a computer, you can run a cable between
          the remote control jacks of two rigs, and whenever the fre-
          quency or modulation mode of either is changed, the other
          will track it if possible.  (If the rigs have incompatible
          frequency coverages, like the 735 and R7000, funny things
          can happen.)
          
               The interface is bi-directional, using TTL levels on a
          single line for sending and receiving serial ASCII data.
          You may need an appropriate hardware interface to convert,
          for example, RS232 to TTL.  (I understand that Commodore
          computers have TTL inputs and outputs so that no interface
          is needed with them.) I used the Motorola MC1488 and MC1489
          chips powered by two 9-volt batteries to interface to my
          RS232 line.  Appendix 1 lists the pinouts used for this
          interface.  If you'd rather buy something, ICOM sells the
          
          
          
          
          
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