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From: bet@ecsvax.UUCP
Newsgroups: net.micro.pc
Subject: Re: 8087 software emulator
Message-ID: <2509@ecsvax.UUCP>
Date: Wed, 16-May-84 23:37:01 EDT
Article-I.D.: ecsvax.2509
Posted: Wed May 16 23:37:01 1984
Date-Received: Thu, 17-May-84 23:29:17 EDT
Lines: 10

What happens inside the 8088 when an 8087 instruction is seen, if the
system doesn't have an 8087? Modern, civilized machines provide a special
"invalid instruction" interrupt. I can't find any description of what happens
in my Intel documentation (poorly organized as it is, that isn't saying much).

If an "invalid instruction" interrupt existed, an interrupt handler could
emulate the 8087.

					Bennett Todd
					...{decvax,ihnp4,akgua}!mcnc!ecsvax!bet