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From: HORVATH_DB@SCOV19.dnet.ge.com (David B. Horvath)
Newsgroups: comp.virus
Subject: RE: MS-DOS on ROM (PC)
Message-ID: <0003.9106041713.AA03722@ubu.cert.sei.cmu.edu>
Date: 3 Jun 91 14:02:46 GMT
Sender: Virus Discussion List <VIRUS-L@LEHIIBM1>
Lines: 22
Approved: krvw@sei.cmu.edu

Radio Shack, in the newer versions of the TANDY-1000 series (SL, TL,
and newer) all have MS-DOS in ROM.  The ROM emulates a write-protected
hard disk with NO free space.  The boot device is selectable in the
system startup (stored in battery backed CMOS RAM) - as well as
certain default AUTOEXEC.BAT/CONFIG.SYS entries.

The pseudo-disk is implemented in socket ROM chips; the salesmen talk
about the ease of upgrade - "just replace the chip with a new one -
easier than upgrading from floppy..."

             - David B. Horvath

+--------------------------------------------------------------------+
|   David B. Horvath, CDP    AT&T Net: 215-354-2468                  |
|   Systems Analyst - GE     Internet: horvath_db@scov19.dnet.ge.com |
|   Adjunct Instructor - CCC DecNet  : SCOV19::horvath_db            |
|   M.S. Candidate - UPENN   ICBM Net: 40 N 75 E                     |
|      (dhorvath@pennsas.upenn.edu)                                  |
|  Standard Disclaimer: All expressed opinions are my own and do not |
|        represent any of my employers or affiliated organizations.  |
|                                                                    |
+--------------------------------------------------------------------+