From: Joerg Hansmann (info_at_jhansmann.de)
Date: 2001-10-13 13:14:12
Hi Vladimir,
----- Original Message -----
From: Vladimir.K <gogol101_at_yahoo.com>
To: <buildcheapeeg_at_yahoogroups.com>
Sent: Thursday, October 11, 2001 3:01 PM
Subject: [buildcheapeeg] Re: comADC-EEG
> Hi Joerg,
>
> sory for late answer, I am busy now.
No problem.
>
> --- In buildcheapeeg_at_yahoogroups.com, "Joerg Hansmann" <info_at_jhansmann.de> wrote:
>
> > What sample rate and how many bits resolution do you get ?
> >
>
> I have not mesured it yet. My etimation that it's worse than 8 bit
> on 256 sampling. Now 256 samples per second is too high.
> But there is growing potencial. I saw some tricks with setting
> interrupt-unmask flag for IDE driver ( prog. hdparm ) and
> IRQ priority optimalization. ( www.best.com/~cae/irqtune/ )
> Maybe ideas from irqtune are also worth for DOS programs.
While the gameport timing loop is running, simply no interrupt must
be processed. Or are you using another technique than polling ?
IMO the advantage of simple and low cost hardware of the gameportEEG
or comEEG is more than compensated by the resulting difficulties with
software.
Regards,
Joerg
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