Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!samsung!emory!att!linac!mp.cs.niu.edu!ux1.cso.uiuc.edu!midway!gsbsun!valley From: valley@gsbsun.uchicago.edu (Doug Dougherty) Newsgroups: comp.os.msdos.programmer Subject: Re: Protected mode/Real mode switching Message-ID: <1991May1.131818.27612@midway.uchicago.edu> Date: 1 May 91 13:18:18 GMT References: <1991Apr15.160333.8107@msuinfo.cl.msu.edu> <37390009@hpopd.pwd.hp.com> <3199@bimacs.BITNET> <1448@balrog.ctron.com> <281@altos86.Altos.COM> Sender: news@midway.uchicago.edu (NewsMistress) Organization: University of Chicago Lines: 19 rcollins@altos86.Altos.COM (Robert Collins) writes: >LOADALL is available on both the '286 and '386. However, it is >implemented as different op codes on each processor. '286 LOADALL >is op code 0F 05, and '386 LOADALL is op code 0F 07. In the October >issue of 'TECH SPECIALIST' is an article I wrote discussing LOADALL >for both the '286 and '386. Included in the article is a detailed >description of the instruction, and source code examples showing how >to use it on each processor. Also included is a LOADALL emulation >TSR written for the '386. This routine will use '386 LOADALL to >emulate '286 LOADALL. >The '486 has LOADALL, but is not accessible via an op code. Then how, pray tell (given your .signature, this cliche seems appropriate) is it accessed? Magic? (IN/OUT ?) -- (Another fine mess brought to you by valley@gsbsun.uchicago.edu)