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From: es1@cunixb.cc.columbia.edu (Ethan Solomita)
Subject: Re: 68000 specific program?
Message-ID: <1991May18.192102.15897@cunixf.cc.columbia.edu>
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Organization: Columbia University
References: <1991May18.180250.20204@cunixf.cc.columbia.edu> <1991May18.190505.21579@ux1.cso.uiuc.edu>
Date: Sat, 18 May 1991 19:21:02 GMT

In article <1991May18.190505.21579@ux1.cso.uiuc.edu> sjhg9320@uxa.cso.uiuc.edu (Maximum Slackness ) writes:
>rs54@cunixf.cc.columbia.edu (Richard Sucgang) writes:
>
>>I am unsure about this but:
>>Is it possible to write a program so coded that it
>>will specifically run only with a 68000 chip, and not t
>>on any of the later generation chips?
>
>The instruction sets for the MC68XXX series are pretty much entirely
>forward compatible, but you can always tell which chip you're using
>by checking the Status Registers or, if you're running under the Mac OS,
>by making a quick call to SysEnvirons (Pre-System 7) or Gestalt. 
>Once you've checked which chips are there, just exit to shell if you've
>returned a result you don't want.
>
>Any chance you're doing this to support an emulator? 
>--
>______________________________________________________________________________
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	I can't quite fathom WHY he would want to do this, but
all the emulators I know of support 030s just fine.
	-- Ethan

The constitution isn't perfect, but
it's better than what we have now.