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From: markz@microsoft.UUCP (Mark Zbikowski)
Newsgroups: net.micro.pc
Subject: RE: BASICA shell problem
Message-ID: <8749@microsoft.UUCP>
Date: Wed, 12-Jun-85 14:20:47 EDT
Article-I.D.: microsof.8749
Posted: Wed Jun 12 14:20:47 1985
Date-Received: Sat, 15-Jun-85 06:18:00 EDT
Organization: Microsoft Corporation
Lines: 5

The problem with "SHELL=" clobbering BASIC's data segment is actually a bug in
the EXEC code for DOS 2.0.  The bug clobbered locations 0x2E-0x31 in the DS
presented to the EXEC system call.  This bug was fixed in DOS 2.1.

Note that SHELL is completely documented in 3.*.