From owner-freebsd-current  Mon Jul 21 10:41:07 1997
Return-Path: <owner-freebsd-current>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id KAA27492
          for current-outgoing; Mon, 21 Jul 1997 10:41:07 -0700 (PDT)
Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.2.228.19])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id KAA27476
          for <current@FreeBSD.ORG>; Mon, 21 Jul 1997 10:41:00 -0700 (PDT)
Received: (from bde@localhost) by godzilla.zeta.org.au (8.8.5/8.6.9) id DAA22131; Tue, 22 Jul 1997 03:36:47 +1000
Date: Tue, 22 Jul 1997 03:36:47 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199707211736.DAA22131@godzilla.zeta.org.au>
To: current@FreeBSD.ORG, smp@csn.net
Subject: Re: CR0_EM define.
Sender: owner-freebsd-current@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

>can someone tell me why machine/specialreg.h has:
>
>#ifdef notused
>#define	CR0_EM	0x00000004	/* EMulate non-NPX coproc. (trap ESC only) */
>#endif

I think it was to remind me not to set it :-).  You can enable it to clear
it.

Bruce