Date: Thu, 10 Feb 2000 17:43:24 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: arcadepreserv AT hotmail DOT com
cc: djgpp AT delorie DOT com
Subject: Re: How Do I start another DOS program from DJGPP ?
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On Thu, 10 Feb 2000 arcadepreserv AT hotmail DOT com wrote:

> frontend.c
> 
> main{
> ...
> setup_timer_interrupt_to_call_int_handler_often_enough;
> exec_dos_program("backend.exe>tempfile.dat");
> ...
> }
> 
> int_handler
> {
> read_last_string_from_file("tempfile.txt");
> process_that_string_quickly_since_we_are_in_an_interrupt;
> }

That won't work (or, rather, will crash your system): you cannot safely 
make DOS calls from a hardware interrupt handler, and reading from a file 
requires a DOS call.