>
>
>I have attached an LPT port document. Please comment. I tested all these
>pins on my computer, so I need you to tell me under what conditions they
>don't show up on your computer. Thanks
> Line Printer (LPT) Pin Assignments
>
>****************************************************************************
>
> Proposed pin assignments for V9.27
>
>
>----------------------- LPT1
>
>Antenna switch data: 2, 7, 8, 9 Top Ten Devices
>Antenna switch strobe: 14
>
>CW Keying: 1
>CW Pullup: 17
>
>DVK F1-F4: 3, 4, 5, 6
>Radio1/Radio2 control: 16
>
>
>----------------------- LPT2
>
>Antenna switch data: 2, 7, 8, 9 for second radio
>Antenna switch strobe: 14
>
>Split headset bit: 16 set and cleared with ALT-? to
> control headset audio per AB6FO
>
>CW PTT: 1 to avoid relay chatter
>
>Escape bit for DVK: 17 pulsed low to halt DVK
>
>
>
Thanks, Ken for the information. I would like to suggest that radio-2
keying be accomplished by putting CW Keying and CW Pullup for radio-2 on
LPT2 pins 1 and 17. You would have to allocate another bit for the DVK
escape bit. This shouldn't be a problem with the guys that do use a relay
to switch keying from radio-1 to radio-2 because the two open collectors can
be just wire-ored together. I don't know what impact that has on the
software, thoough. Does it mean that two radios can be cqing at once?
Fred KE7X
Fred Cady (ieefc@msu.oscs.montana.edu)
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