Date: Thu, 11 Feb 1999 10:18:07 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender: eliz AT is
To: Engard Ferenc <fery AT pons DOT sote DOT hu>
cc: djgpp AT delorie DOT com
Subject: Re: pm and rm interrupt handlers vs. emm386
In-Reply-To: <Pine.LNX.3.96.990211031118.31261C-100000@Pons.sote.hu>
Message-ID: <Pine.SUN.3.91.990211101748.7662P-100000@is>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Reply-To: djgpp AT delorie DOT com


On Thu, 11 Feb 1999, Engard Ferenc wrote:

> My test machine is currently a P266 with
> win98 (dos mode), but (if I can reach the needed speed) I want to run
> it on a 386SX-20 laptop (currently ms-dos 5.0 :)))

I suggest to read section 18.11 of the FAQ.  In particular, it tells
you that on a 386SX/16, even a 1KHz interrupt rate will eat more than
1/2 of the cycles.  So I'd say that for 50KHz rate anything less than
a P120 won't do.

Section 18.11 also has advice on how to design your program so that
interrupt handling has as little overhead as possible.

If you have already read the FAQ, please ask more specific questions,
based on what is described there.

> PS2: Yesterday I didn't knew what dpmi is good for, now I only don't
> know what does it do... Hmmmhhhh... :-)

See section 22.5 of the FAQ, it explains this.