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Date: | Mon, 31 Jan 2000 18:49:57 +0200 (IST) |
From: | Eli Zaretskii <eliz AT is DOT elta DOT co DOT il> |
X-Sender: | eliz AT is |
To: | Francisco Pastor <etra-id AT etra DOT es> |
cc: | djgpp AT delorie DOT com |
Subject: | RE: I need to advice on timing... |
In-Reply-To: | <873hoq$1q5$1@talia.mad.ttd.net> |
Message-ID: | <Pine.SUN.3.91.1000131184512.2604C-100000@is> |
MIME-Version: | 1.0 |
Reply-To: | djgpp AT delorie DOT com |
Errors-To: | dj-admin AT delorie DOT com |
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On Mon, 31 Jan 2000, Francisco Pastor wrote: > Yes, is posible to increase the timer speed 65535 times faster. You only > have to program the new timer divisor in the 8259 timer controler. > The MSDOS set the timer counter with the 0xffff value. With a inferior > varlue you get more ticks by second. Beware: increasing the timer tick interrupt frequency too much will eventually bring your machine to its knees. Hardware interrupt handling has a significant overhead in protected mode. The FAQ recommends not to go beyond 20KHz if the machine needs to do something non-trivial in the foreground thread. Slower machine will probably become busy/unstable even before 20KHz.
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