Date: Mon, 28 Nov 94 18:12:50 -0500 From: dj AT stealth DOT ctron DOT com (DJ Delorie) To: trav AT clark DOT edu Cc: djgpp AT sun DOT soe DOT clarkson DOT edu Subject: Re: Interrupts > handler(){ > printf("foo"); > } One other problem is that you can't do anything in a real mode callback (or interrupt) that might cause a mode switch. Basically, you can do integer math and maybe call a function or two - it's pretty limited. It may work sometimes, but it's not guaranteed. DJ