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Date: Mon, 4 Aug 2003 10:33:18 -0700
From: David Schultz <das@FreeBSD.ORG>
To: pat bey <phaza7@yahoo.com>
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cc: freebsd-hackers@FreeBSD.ORG
Subject: Re: Assembly interrupts and Developers handbook
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On Sat, Aug 02, 2003, pat bey wrote:
> Secondly, What can I find a list of other interrupts within
> FreeBSD like the int 80h.  Or is this the only interrupt. Like
> example interrupt for video stuff, disk access ....etc. .etc

On x86, all system calls are made through int 80h with %eax set to
the syscall number.  See src/sys/kern/syscalls.master.  In
general, you don't access the hardware directly unless you're
writing a device driver.