Agreed, there's no problem if you can "own" the OS; but on an end-
user's Windows PC, you can't do that.
73,
Dave, AA6YQ
--- In digitalradio@yahoogroups.com, Steve Hajducek <[EMAIL PROTECTED]>
wrote:
>
>
> Hi Dave,
>
> I mentioned AMTOR as its timing is more robust that PACTOR I.
>
> As I have stated to the MARS-ALE users, the future version of that
> tool when PACTOR I support is added ont he PCSDM will pretty much
own
> the OS, not a problem for our purposes as that one program running
is
> our only focus. GTOR is less demanding, but may be require the same
> approach as PACTOR I. This is not required of DBM ARQ which is much
> less demanding that GTOR.
>
> /s/ Steve, N2CKH
>
> At 06:43 AM 8/28/2006, you wrote:
> >Precise timing isn't the issue, Steve. WinWarbler originally used
> >GetTickCount() and QueryPerformanceCounter() in its CW generation
> >code, but a high-resolution timer using the multimedia library is
> >sufficiently accurate and more convenient. The problem is thread
> >scheduling. WinWarbler uses SetPriorityClass to establish
> >REALTIME_PRIORITY_CLASS and SetThreadPriority to establish
> >THREAD_PRIORITY_TIME_CRITICAL . Nonetheless, there are many CPU-
> >consumptive events that Windows insists on handling at higher
> >priority -- such as displaying and moving the Task Manager window.
> >Spin locks are not an acceptable solution IMHO; the user would find
> >it disconcerting if the mouse pointer stopped following mouse
> >movements during CW generation or Pactor-3 operation, for example.
> >Yes, one could dedicate a headless Windows PC to executing one
> >application like Pactor-3, but what would be the point? Even the
most
> >expensive Pactor-3 TNC would be cheaper and more compact to boot.
> >
> >I didn't comment on the feasibility of implementing AMTOR on
Windows;
> >Pactor-2 and Pactor-3 were the protocols I mentioned.
> >
> > From my days as a CPU architect and designer, I have lots of
> >experience with real-time operating systems and applications -- but
> >WinWarbler was my first encounter with extracting real-time
> >performance from Windows. Any suggestions or pointers you have in
> >this area would be appreciated.
> >
> > 73,
> >
> > Dvae, AA6YQ
>
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