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Path: utzoo!linus!security!genrad!decvax!microsoft!markz
From: markz@microsoft.UUCP (Mark Zbiokowski)
Newsgroups: net.micro.pc
Subject: re: Rumors
Message-ID: <8665@microsoft.UUCP>
Date: Mon, 24-Oct-83 16:12:48 EDT
Article-I.D.: microsof.8665
Posted: Mon Oct 24 16:12:48 1983
Date-Received: Tue, 25-Oct-83 04:08:02 EDT
Organization: Microsoft Corporation
Lines: 18


	Recent rumours suggest that Microsoft made use of Intel reserved
	vectors in PC-DOS and the new 80188 makes use of these vectors.
	Thus old software using these vectors will bomb out.  Some suggest
	this is the reason for the delay in the IBM PC Junior (Peanut) which
	is probably based on the 80188.

I am amazed that people submit articles with 'rumors' without even  bothering
to read *any* of the relevant documentation.  In the IBM technical reference
on page 2-4 IBM lists all of the interrupt vectors that THEY use and/or
reserve.   These are in the range 0-1F.

On page 2-7 of the same document, IBM lists the DOS vector assignments as
being in the range 20-3F.

In *any* reference on the Intel 186/8 they list the vectors in the range 0-1F
as being in the Intel reserved range.

The other 'rumors' are mere corollaries of this misapprehension.