Windows 95C / OSR2.5 hash?

Discussion in 'Windows XP / Older OS' started by malakai1911, Apr 2, 2011.

  1. malakai1911

    malakai1911 MDL Novice

    Feb 27, 2008
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    #1 malakai1911, Apr 2, 2011
    Last edited: Nov 26, 2011
    Does anyone know if any of these known images match up with an MSDN copy, or an official MS build of any capacity?
    Was OSR 2.5 ever on MSDN?
    (I know that Windows 95 was allegedly on MSDN for download until 2003, but I don't know details of what version was hosted there).
    I keep looking around and can't find a definitive answer.

    (tldr; It looks like Disc #3 is the "Best Available Copy", so do yourself a favor and get that one if you are collecting them.)

    * Disc #1
    File: win95c_osr25.iso
    Size: 596,140,032 bytes
    MD5: 63D344A46010E85871C79DCA32F17FCB
    SHA1: E050106B59520BABB64295041E44287B0E29A17F
    CRC32: DD09CE03
    Notes:
    - Likely IS an 95C/OSR 2.5 disc, although ISO contains files modified 8/24/1996, but they are bytewise identical with all files on discs #2/#3/#4 (which are dated 11/26/97).
    - Differences exist between this ISO and Discs #2/#3/#4:
    \ Additions: contains "AUTORUN.INF" file in the root of the disc and an "AUTORUN" folder (which contains "AUTORUN.EXE" and "WIN95CD.ICO").
    \ Deletions: does not contain "ohare.inf" in the "WIN32" folder.
    \ Alterations: modified files: "GOODTIME.AVI", "WELCOME1.AVI", "WELCOME2.AVI", "WELCOME3.AVI". All four are smaller in size.
    - This image IS NOT bootable.

    * Disc #2
    File: Windows95CISO.iso
    Size: 617938944 bytes
    MD5: 429F1F3DB1EE6C385CD2EECBA1138F7A
    SHA1: D0108F98F4D08EE7335606CE229A2FEBE6737004
    CRC32: 55538854
    Notes:
    - Likely IS an 95C/OSR 2.5 disc, as ISO contains files modified 11/26/1997.
    - Identical contents as Disc #3 and #4 (no differences whatsoever inside ISO image), but the ISO image itself is different.
    - This image IS NOT bootable.
    - This image is byte-for-byte identical with Disc #3, except has padding ("00") at the end of the image.

    * Disc #3
    File: Win95_OSR25.iso
    Size: 617308160 bytes
    MD5: 912DB741210BC04CB8591EDEEC3FA0A0
    SHA1: 97F66E77445CD4B1AC55508C36D0FDBC17F17F25
    CRC32: 115C1EC4
    Notes:
    - Likely IS an 95C/OSR 2.5 disc, as ISO contains files modified 11/26/1997.
    - Identical contents as Disc #2 and #4 (no differences whatsoever inside ISO image), but the ISO image itself is different.
    - This image IS NOT bootable.
    - This image is byte-for-byte identical with Disc #2, except has NO padding ("00") at the end of the image.

    * Disc #4
    File: Win95_OSR25.iso
    Size: 596627456 bytes
    MD5: C7B9A6DD79C262E2C287E26110EA6153
    SHA1: 02FB6BB9A6163868A2FA4069FD05BACF1F196ED2
    CRC32: B7F18C7C
    Notes:
    - Likely IS an 95C/OSR 2.5 disc, as ISO contains files modified 11/26/1997.
    - Identical contents as Disc #2 and #3 (no differences whatsoever inside ISO image), but the ISO image itself is different.
    - This image IS bootable.
    - This image is significantly different bytewise as compared with Disc #2 and Disc #3, the ISO was likely created by a different program (or modifications to insert the boot sector may have altered the structure somehow).
     
  2. malakai1911

    malakai1911 MDL Novice

    Feb 27, 2008
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    Thanks, I knew about the dates, but was more interested in MSDN copy info, unless OSR 2.5 was never released on MSDN (in which case Retail is good enough).

    I'm gonna test out the images of what I believe are 2.5 in VMWare in a little bit, to just be sure that they are the real deal.
     
  3. malakai1911

    malakai1911 MDL Novice

    Feb 27, 2008
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    Bump, as I have found and compared all four images in a more detailed fashion to let people know the differences and edited the first post.

    Can anyone find a copy of the Windows 95 download page on MSDN on Archive.org? Or have any other verifiable information to add?

    Thank you :)
     
  4. jayblok

    jayblok MDL Guru

    Dec 26, 2010
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  5. malakai1911

    malakai1911 MDL Novice

    Feb 27, 2008
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    Swedish? And I was looking more along the lines of a reliable source for info (hash, filename, file size) regarding an MSDN copy, not a torrent download.
     
  6. malakai1911

    malakai1911 MDL Novice

    Feb 27, 2008
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    #7 malakai1911, May 3, 2011
    Last edited: May 3, 2011
    (OP)
    More information.

    I have a feeling that #2 and #3 were the same image, but that #2 got those end bytes ("00" padding) appended somehow later, perhaps by some odd downloader or downloading service, which changed the file.

    I also share the view that different programs likely created the images, so I looked closer and found the following.


    Disc #1: CDIMAGE 2.47 (10/12/2000), UltraISO 8.6.5.2140
    Disc #2: CDIMAGE 2.38 (08/27/1997)
    Disc #3: CDIMAGE 2.38 (08/27/1997)
    Disc #4: CDIMAGE 2.38 (08/27/1997) ???

    So... Discs 2 or 3 could potentially have been created by Microsoft (shows a CDIMAGE that is old enough)... and I find it unlikely Disc #1 ever was :), they likely dont use UltraISO. I think Disc 4 was a modified version of 2/3 to insert a bootsector, but Disc 4 bytewise looks substantially different (though content of ISO is exactly identical).

    I'm only assuming one of these was from M$. But as I said, I'd like to see more information. For the time being, I think Disc #3 is the "best available copy", and closest thing to an original disc.
     
  7. Liebo

    Liebo MDL Member

    Jul 9, 2009
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    I think so.
     
  8. starx

    starx MDL Novice

    Mar 4, 2011
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    All my downloads are checked to Disc #1 (after downloaded from several sources).

    So, may I make request for deltas patch to convert my download (Disc #1) to the other versions.

    Thank you very much.
     
  9. empireum

    empireum MDL Junior Member

    Oct 25, 2013
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    I have a complete collection of Windows 95 discs and floppies downloaded from WinWorldPC.
     
  10. Mutagen

    Mutagen MDL Addicted

    Feb 18, 2013
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    Great link, except my PTSD has been re-triggered by not considering what else is there: OS/2. (Lithium, quick, I need my lithium)!
     
  11. starx

    starx MDL Novice

    Mar 4, 2011
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    That site is where I got the Windows 95C (which checked to Disc #1 on the first post).

    Since, my other downloads are also checked to Disc #1 which I downloaded from other sources. Thus, I make a request for deltas patch to convert it to other version of disc on first post. Hopefully someone willing to make the deltas.

    Thank you.
     
  12. ibmpc5150

    ibmpc5150 MDL Member

    Apr 14, 2014
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    Disc 1 <-- It is Not made by Microsoft at least. (MS used to make ISO with CDIMAGE.)
    Disc 2 <-- This must be over-dumped.
    Disc 3 <-- This is correct size of Windows 95C OSR 2.5
    Disc 4 <-- I think this is not made by Microsoft, because Windows 95 doesn't support to boot from CD itself but floppy.
     
  13. LNW

    LNW MDL Junior Member

    Aug 13, 2011
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    Hi,

    Could you please inform the correct size of the ISO file of Windows 95 4.00.950 (RTM) and 4.00.951 (OEM/OSR1)?


    Thanks,


    LNW
     
  14. ibmpc5150

    ibmpc5150 MDL Member

    Apr 14, 2014
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    #15 ibmpc5150, May 24, 2014
    Last edited: May 25, 2014
    Well, I think ISO of Windows 95 4.00.950 (RTM) was Not released as Retail Full package.
    (Retail full package version were released as Floppy version only.)
    They were released as Retail Upgrade or OEM.
    This is information for Windows 95 Retail Upgrade or MSDN

    Windows 95 (Original Release / USA)

    1) Upgrade version or MSDN version

    SHA1:49c7019b829266373b62e212d8ec2e348f5fcf63 / (ISO CD Image, Size : 631,629,824 bytes)


    I don't know OEM version.
     
  15. Oz

    Oz MDL Expert

    Sep 1, 2009
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    @WinDev

    Why do you post all those hashes, when you know most of them are home made?

    2003,12:00:00, looks the crap one would pick up from BA.
     
  16. pottzman

    pottzman MDL Novice

    Dec 8, 2009
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    #17 pottzman, Dec 13, 2014
    Last edited by a moderator: Apr 20, 2017

    Okay here is Windows 95 4.00.950 OEM (RTM)

    Code:
      File: en_win_95_x86_4.00.950_cd_000-04404.iso
    CRC-32: 31a787f7
       MD4: 70daecae571eeabbce41b4c8e2362202
       MD5: 3f7919ceca5f53a08a84c26d692dbb8d
     SHA-1: 285298256c8d406a83ff3c45481cbf2099202c46
    Here is Windows 95 4.00.950 OEM (OSR1)

    Code:
      File: en_win_95_x86_4.00.950a_cd_000-27722.iso
    CRC-32: 66f7ec0b
       MD4: d4de29ac9a560d1b9217c10536794990
       MD5: 80dee3cdc0ccb3f4414a1c0c6f45c8b2
     SHA-1: 9f28e89aec4dd694f1bb782ca0ec949987902139
    These are ISO's of actual cd's I own
     
  17. Threat

    Threat Lord of the Files

    Feb 23, 2014
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    Got the first one but not the second. Could you do a delta / SVF from first RTM to second OSR1 ?
     
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  18. pottzman

    pottzman MDL Novice

    Dec 8, 2009
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    yeah but I need 20 posts. I got 18 lol
     
  19. pottzman

    pottzman MDL Novice

    Dec 8, 2009
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    okay that should do it