Path: utzoo!mnetor!uunet!husc6!bbn!rochester!cornell!batcomputer!itsgw!steinmetz!davidsen
From: davidsen@steinmetz.steinmetz.UUCP (William E. Davidsen Jr)
Newsgroups: comp.sys.ibm.pc
Subject: Re: What's the deal on the 80387 and real mode interrupts?
Message-ID: <8349@steinmetz.steinmetz.UUCP>
Date: 4 Jan 88 17:50:15 GMT
References: <1269@looking.UUCP>
Reply-To: davidsen@crdos1.UUCP (bill davidsen)
Organization: General Electric CRD, Schenectady, NY
Lines: 13

In article <1269@looking.UUCP> brad@looking.UUCP (Brad Templeton) writes:
| My documentation on the 387 states that an exception triggers trap 16 (decimal)
| in the 386.   If this maps into the 16th vector in real mode, as it seems to,
| this is the same as IBM's VIDEO Bios call!

Looking at the original 8086 product manual, it clearly states that
interrupts 0-31 are reserved to Intel for expansion, and int 224 is
reserved to Digital Research for CP/M-86. There is a conflict, and it's
because Microsoft/IBM messed up. Yes, you can get problems here.
-- 
	bill davidsen		(wedu@ge-crd.arpa)
  {uunet | philabs | seismo}!steinmetz!crdos1!davidsen
"Stupidity, like virtue, is its own reward" -me