DOS 1.0 copyright string

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Mon Sep 10 17:54:08 2001

The are several strings embedded in the dos bot in command.com
and IBMdos. The bios was uniquely IBM and not a copy.

Also there are embedded characters in the code like:

    code....
    move a,h
    ret
    DB "D"
    modecode...
    push D
    RET
    DB "R"

and so on, it's spread out a bit.

Allison



-----Original Message-----
From: Cini, Richard <RCini_at_congressfinancial.com>
To: ClassCompList (E-mail) <classiccmp_at_classiccmp.org>
Date: Monday, September 10, 2001 10:18 AM
Subject: DOS 1.0 copyright string


>Hello, all:
>
> I was able to get my hands on the two DOS 1.0 disks. So, I spent a
>few minutes with Sourcer and a good hex editor in search of the DR
copyright
>notice. I didn't find it.
>
> Maybe I misunderstood the timing of the message, but I thought that
>the 1.0 version of DOS contained copyright information from Digital
Research
>and when IBM found out, they compelled MS to expunge it, resulting in
the
>1.1 version.
>
> The file dates are as follows:
>
>c:\>dir a:
> Volume in drive A is 3COM53_D1
> Volume Serial Number is 11DC-3A5E
>
> Directory of A:\
>
>07/23/81 12:00a 1,920 IBMBIO.COM ***
>08/04/81 12:00a 3,231 COMMAND.COM ***
>08/13/81 12:00a 6,400 IBMDOS.COM ***
>09/10/01 09:28a 66,235 COMMAND.LST
>09/10/01 09:27a 4,374 IBMBIO.SDF
>09/10/01 09:28a 143,874 IBMDOS.LST
>09/10/01 09:28a 16,231 IBMDOS.SDF
>09/10/01 09:27a 25,780 IBMBIO.LST
>09/10/01 09:28a 10,141 COMMAND.SDF
> 9 File(s) 278,186 bytes
> 1,177,088 bytes free
>
> The files are all dated before the PC's release. I find it
>interesting that the file date for DOS proper was one week before the PC
>announcement. Microsoft tweaking until the last minute.
>
> IBMBIO contains only a revision mark and no copyright notice. IBMDOS
>contains a header common to all versions of DOS ("M;S<>=~KRAA") and no
>copyright notice. COMMAND contains a copyright message which is the one
>probably displayed upon execution:
>
> The IBM Personal Computer DOS
> Version 1.00
> (C)Copyright IBM Corp 1981
> Licensed Material - Program Property of IBM
>
> So, where did I go wrong??
>
>Rich
>
>
>==========================
>Richard A. Cini, Jr.
>Congress Financial Corporation
>1133 Avenue of the Americas
>30th Floor
>New York, NY 10036
>(212) 545-4402
>(212) 840-6259 (facsimile)
>
Received on Mon Sep 10 2001 - 17:54:08 BST