Re: [Tlf-devel] fldigi & tlf

[Doug Smith]

On Fri, 2007-11-23 at 01:45 +0100, Wilbert Knol wrote:
> > The consensus is that even an RT Linux kernel has limitations due to
> > timing and that QRQ operation isn't feasable.
> 
> > How well this is being 
> > accomplished on the Win programs, I don't know.
> 
> I don't have a scope handy, but I guess at a typical contest speed of 32 WPM, 
> dots may be 10 ms or so. Allowing for + or - 10% jitter, it could be a bit 
> too demanding for the kernel, and no doubt it is the same for any of the 
> Windows strains
> 
> Hence the hardware implementation (W1EL winkeyer) which may also be the best 
> approach for Linux. It echos back to the PC any characters sent and that 
> would allow real-time editing of the CW buffer.

It works fine on Windows XP at at least 34wpm and IIRC quite a bit
faster, using the parallel port.  A 3rd-party DLL (DLPORTIO) is
necessary for parallel port CW under XP.

They do tend to recommend WinKey, and that probably *is* the right
answer for TLF. 
-- 
Doug Smith W9WI
Pleasant View, TN  EM66