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From: oster@well.sf.ca.us (David Phillip Oster)
Newsgroups: comp.sys.mac.programmer
Subject: Re: F Emulator, Just what the hey is it
Message-ID: <19493@well.sf.ca.us>
Date: 10 Aug 90 05:24:43 GMT
References: <1990Aug8.100755.1@mel.cipl.uiowa.edu>
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 10

68000 instructions that begin with the hex code 0xFxxx are reserved for 
coporcessor chips. If you don't have a coprocessor, then you get a software
interrupt to an interrupt routine that is supposed to emulate the coprocessor.
If the 0xFxxx instruction is in fact ransom garbage that the processor is
being asked to execute, then the emulation routine will just give up. Since
the processor is already executing garbage, Apple decied the only safe thing
to do was System Error.
-- 
-- David Phillip Oster - Note new signature. Old one has gone Bye Bye.
-- oster@well.sf.ca.us = {backbone}!well!oster