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 PostPost subject: Does Retail MS-DOS 3.31 Exist?        Posted: Wed Apr 17, 2019 2:11 am 
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I've seen many places saying that MS-DOS 3.31 was released only to OEMs like Compaq, Emerson and Olivetti. I saw in the database there is a non-OEM release and I am wondering is it an actual retail release. I've seen a few modified MS-DOS 3.31 from 1989 and not sure if the one on the FTP is one of them.

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Wed Apr 17, 2019 6:31 am 
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Hello!
DOS 3.31 was only shipped to OEMs.
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Last edited by windowsio on Thu Apr 18, 2019 7:08 am, edited 1 time in total.

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Wed Apr 17, 2019 9:20 am 
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Microsoft did release versions of 3.x, which were used with small OEM computers. You can see the disk images on the downloads, of ms-dos 3.3x. The OEM versions have a hacked kernel, and sometimes hacked video support. This was still in the days of msdos-compatible computers, where the text-mode would run with little modification, but the video calls varied from machine to machine.

Version 3.31 contains fat16 support, which Compaq invented and microsoft copied. I suppose later they released a 3.31 version without a hacked kernel.


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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Wed Apr 17, 2019 12:41 pm 
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So did Microsoft release a retail version?

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Wed Apr 17, 2019 1:50 pm 
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There was no true retail release before MS-DOS 5.0 Upgrade. You can find some rather generic looking MS-DOS 3.x releases, which I believe are what os2fan2 is talking about. Probably released by minor OEMs without many customizations to the base OAK, if any at all.

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Thu Apr 18, 2019 4:27 am 
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I actually have the floppies for DOS 3.31 Compaq. Original copies, with original labels, and on 5 1/4" disks

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Thu Apr 18, 2019 4:43 am 
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Here is the version I found.

It has an IHC signature means it was possible written using Windows 9x. It also has creation and access time (1999) which is uncommon for untouched MS-DOS floppies. The date and time is inconsistent and it has 0x0000 timestamp for most files whereas Microsoft normally use 0x0001. There are 10 files that does not belong to DOS. Also I am pretty sure it was 2 disks cramped together using a 1.44MB disk and the file orders are wrong.

After deleting extra files and restoring dates and time, I've separated it into 2 disks and reconstructed them with the correct file order. I found out the OEM string overwritten by the IHC signature was IBM 3.3 instead of MSDOS3.3.

Comparing this to the original MS-DOS 3.30 and 3.30A release, it is very similar and the version string were mostly unchanged.

I am not sure if the version on the FTP but this looks fake and unprofessionally made.

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Thu Apr 18, 2019 4:44 am 
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DVINTHEHOUSEMAN wrote:
I actually have the floppies for DOS 3.31 Compaq. Original copies, with original labels, and on 5 1/4" disks

Sorry for the bump, but which version is that (what year)?

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Thu Apr 18, 2019 5:07 am 
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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Thu Apr 18, 2019 5:35 am 
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Can you please share it?

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Thu Apr 18, 2019 5:40 am 
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Take pics of the disk or write it and upload to the FTP
If my dang motherboard had Floppy and IDE ports I would do that but it doesn’t... it sucks

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Thu Apr 18, 2019 11:20 am 
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USB floppies will for the most part work.


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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Thu Apr 18, 2019 11:50 am 
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I don’t think they make 5.25” usb drives

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Thu Apr 18, 2019 12:57 pm 
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There is a 3.5 version of 3.x


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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Thu Apr 18, 2019 1:58 pm 
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But I have the 5.25” versions of the disks. Read the whole topic before telling me about a non existent product, such as a 5.25” USB floppy disk drive.

DVINTHEHOUSEMAN wrote:
I actually have the floppies for DOS 3.31 Compaq. Original copies, with original labels, and on 5 1/4" disks

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Fri Apr 19, 2019 9:22 am 
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Lets get back to topic. The purpose is to find out if a retail or non-OEM version of MS-DOS 3.31 exist. I guess the answer is yes because there is one on the FTP.

Also, can somebody please compare the file I uploaded with the one on the FTP to see if they are the same.

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Fri Apr 19, 2019 12:55 pm 
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It's the same copy, and not an original dump.

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 PostPost subject: Re: Does Retail MS-DOS 3.31 Exist?        Posted: Fri Apr 19, 2019 1:43 pm 
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I made a fix not sure if it is acceptable or not.

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