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Mail Archives: djgpp/1992/08/24/13:04:57

Path: grendel.demon.co.uk!jes
From: jes AT grendel DOT demon DOT co DOT uk (Jim Segrave)
Reply-To: jes AT grendel DOT demon DOT co DOT uk
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: Installable ISRs
References: <9208241329 DOT AA23573 AT isis DOT cshl DOT org>
Date: Mon, 24 Aug 92 16:40:20 GMT
Organization: None
Lines: 16

In article <9208241329 DOT AA23573 AT isis DOT cshl DOT org> you write:

> There already is an interrupt - driven serial I/O package available on the
> FTP site, have you tried it?
> 
> -T
But this loads a real mode handler as a TSR then connects to it via gcc. I
want to install a protected mode handler with an entry in go32's idt, to
minimise the overhead (in context switching) of handling serial interrupts.
Ideally, an interrupt gate should give a very fast protected mode switch to
my handler (no stack swapping code or other PC nasties).

--
Jim Segrave


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