From:	moreau AT alpes-net DOT fr (nico)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: exact timing and allegro timers
Date:	Sat, 05 Jul 1997 07:19:57 GMT
Organization:	NetSat Inc.
Lines:	30
Message-ID:	<33bdf372.309421@news.internetsat.com>
References:	<199707041814 DOT LAA21998 AT adit DOT ap DOT net>
Reply-To:	moreau AT alpes-net DOT fr
NNTP-Posting-Host:	grenoble09.alpes-net.fr
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

On Fri, 4 Jul 1997 18:14:35 GMT, Nate Eldredge <eldredge AT ap DOT net>
wrote:

>You wrote
>>I need to measure intervals exactly (to aprox 1/400 of second) and I also
>>need to use allegro with mouse(that requires timers)
>>So I did timer (using allegro) at 100hz and measuerd intervals to 1/100 sec
>>but increasing timer 400Hz efectivly degrades speed of computer.
>>So this way us unusable anymore.
>>
>>Do you have any ideas how to solve this please?
>
I too have had a few wories about Allegro timer routines, the fact is
that Allegro interrupt handler is quite big. 
I think it would be a good idea to have different versions of the
handler when building the library
You could then choose your handler, depending on what fucntions you
really need: mouse, midi,fli,gui,windows compatibility ....

I coded a  handler a few months ago with Watcom + DOS/4GW and it
wasn't slowing down my computer (P90) when running at 1000Hz

Another idea for Allegro timers would be to increase maximum rate say
2000Hz so you could get more precise timming.



Nico 
e-mail: moreau AT alpes-net DOT fr        
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