From: Joerg Hansmann (info_at_jhansmann.de)
Date: 2001-05-21 13:12:07
Hi,
----- Original Message -----
From: Waldemar Neto <wpneto_at_o...>
To: <buildcheapeeg_at_yahoogroups.com>
Sent: Sunday, May 20, 2001 5:56 PM
Subject: Re: [buildcheapeeg] Re: Sound Card-Phase II, real-time analysis
>Hi Joerg,
>
> 3.9 ms is a very good delay and the interpolation idea too.
>
>Maybe be fine to do a simple test for real time on pragmatic effects
> on RS232 processing ( with any device feeding data - eg. calculator
> sending a senoidal function ) putting a short routine to see and
> watching the performance. If you already did it ( or saw it ) then there's
> no problem;
>
> otherwise, the practical effects may bring surprises
> (especially for Windows' "misjudgement bandwidth ")
Under Windows I would not guarantee for anything.
So if you have something very timecritical like generating
stimuli for evoked potential measurements I would recommend
to put this part into the AT90S4433 software.
>One more thing: joining with the cheap eeg idea , would it be good to
> allow using DOS too ( for retrieve old PCs XT up to 486 ) ? Just
> wondering that it could amplify the beneficts of the project .
Under DOS it is easy to get well defined response times.
Regards,
Joerg
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