[ct-user] Pin 14

[Jim Pratt]

In CT version 9.34, the radio1/radio2 toggle was put on pin 14 of LPT1.  
That is indeed true and works, going from +5 to 0 volts when switched.

In CT version 9.89.002, a keyer was added with paddle inputs of pin 12 and 
13 of LPT1.  The user was instructed to use pullup resistors on those two 
pins to pin 14...the radio strobe line!

The only pins of LPT1 that aren't otherwise used (as far as I can tell) are 
pin 10, 15 and 19-24.  19-24 are all ground pins.  Pin 10 and 15 are 
normally input pins when this port is used as a printer port.

Any suggestions on where to get the +5 pullup voltage from besides putting 
the pullup resistors inside the computer or breaking out a wallwart?

73, Jim  N6IG

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