From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
Newsgroups: comp.os.msdos.programmer,comp.os.msdos.djgpp
Subject: Re: Interrupts reserved for BASIC
Date: Wed, 29 Sep 1999 10:31:55 +0200
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On 28 Sep 1999, George Swan wrote:

> After reading some of the other responses here I thought I would
> add that I have always assumed that, since DOS isn't multi-tasking,
> that any interrupt vector that contained a NULL pointer was available
> for my program to use.

AFAIK, unused interrupts don't have a NULL pointer in the interrupt
vector table, they have a pointer to an IRET instruction.