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Path: utzoo!linus!decvax!decwrl!amdcad!lll-crg!well!farren
From: farren@well.UUCP (Mike Farren)
Newsgroups: net.micro,net.micro.pc
Subject: Re: Re: IBM's new 32 bit machine - not an 80386?
Message-ID: <449@well.UUCP>
Date: Wed, 8-Jan-86 15:29:34 EST
Article-I.D.: well.449
Posted: Wed Jan  8 15:29:34 1986
Date-Received: Fri, 10-Jan-86 04:57:20 EST
References: <216@utastro.UUCP> <210@ism780c.UUCP> <399@l5.uucp> <168@intelca.UUCP> <1@unisoft.UUCP>
Organization: Whole Earth Lectronic Link, Sausalito, CA
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Xref: linus net.micro:12212 net.micro.pc:6224

In article <1@unisoft.UUCP>, fnf@unisoft.UUCP (Fred Fish) writes:
> 
> The software 8088 emulation mode on the AMIGA is reported to execute
> IBM PC programs at about 40% of the speed of a real 8088.  Given that a 
> 68020 is about 2-3 times faster than a plain 68000, I would expect 
> the equivalent 68020 emulation to run at 80-120% of a real 8088 under 
> the same conditions.  Of course this is all just speculation...

  I've seen a beta version of the PC emulation.  Sorry, it ain't 40%, more
like 15%. S - L - O - W!  The "quick" emulator, if I am not mistaken, will
incorporate an 8088 processor, so no comparison there.
  Having written a number of emulators in my time, I've found that you are
pretty lucky if you can get even 50% speed out of one.  Hardware just does
some things a lot more efficiently than software, and real-time emulation
of another piece of hardware is definitely one of those things.

-- 
           Mike Farren
           uucp: {dual, hplabs}!well!farren
           Fido: Sci-Fido, Fidonode 125/84, (415)655-0667
           USnail: 390 Alcatraz Ave., Oakland, CA 94618