[Dx4win] CW keying via LPT

[Massimo 'Max' MUCCI - I8NHJ]

On the way to optimize my set-up I've decided to disuse the old "transistor type" CW parallel interface
and build a new one interface using opto-coupler.
I already build such interfaces and used it in several circumstances but all were connected to the
computer serial interface, not on the parallel one.

Following the instruction found here and there, I've built the interface using the PINs 17 and 18.

The interface runs flatly with N1MM, MixW32 and some other software but it didn't run in Dx4Win who, indeed,
set the pin 17 to high at startup putting the interface in TX mode.

I've also found that it run the parallel port in a strange way, setting some signal to LOW on transmit
(while Dot'ng or Dash'ng) and HIGH on time spacing.

Just to be sure, I've installed CTWIN and my cable run perfectly on it also.

So, have anyone experience about that or maybe Paul can you verify my assertion and suggest a solution.

Thank you.

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73 de Max, I8NHJ/NH7CU
one of EL2PP, 1A0KM, JT1Y, E30GA, T77V, TT8MM, T32R, K5K, XR0X, S05X, 4O3T