Hello Jeff,   
      
      JB> I just went to check out Amiga pinouts to see just   
        > what all the serial port could handle, and apparently   
        > different models had varying capabilities, everything   
        > from audio in, audio out, the various power voltages   
        > you mention, interrupts, and even the system clock.   
        > That's actually pretty awesome from a tinkerer's   
        > perspective.   
      
       Handy both for homebrew electronics people and for   
   peripheral manufacturers.  I never did figure out what the audio in was for   
   though, afaik Paula didn't have an ADC.   
      
     JB> Might have been a headache for people to use standard   
       > cables with, though, until they made sure it was   
       > ignoring those other pins instead of passing them   
       > through.   
      
       I made myself a little adaptor: 25 pin M to 25 pin F   
   with only the "safe" pins wired through.   
      
   - Andy Ball   
      
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