Date: Sat, 26 Oct 1996 17:44:44 +0100 (MET) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: msmith@atrad.adelaide.edu.au (Michael Smith) Cc: babkin@hq.icb.chel.su, msmith@atrad.adelaide.edu.au, erich@lodgenet.com, hackers@freebsd.org Subject: Re: DOS emulation (was Re: Networking in PCEMU (1/2)) Message-ID: <199610261644.RAA28705@labinfo.iet.unipi.it> In-Reply-To: <199610261630.DAA23042@genesis.atrad.adelaide.edu.au> from "Michael Smith" at Oct 27, 96 03:00:11 am
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> Trust me; you can run real-mode '286 code on a V20/V30. I have done > this. I _believe_ that the Hedley emulator is up to this. cannot comment on the first sentence, but for the latter I am sure that some intructions are missing. It's been a couple of years since I worked on this code, so I have forgotten the details, but I remember adding some 286 instructions and some are still missing. ENTER/LEAVE are probably two of them, maybe PUSHALL/POPALL as well. The fact that some program recognizes the emulated processor as a V20 does not mean that all V20 instructions are emulated! Luigi ==================================================================== Luigi Rizzo Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it Universita' di Pisa tel: +39-50-568533 via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 http://www.iet.unipi.it/~luigi/ ====================================================================
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