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How many different DOS discs were there?

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In the 80s I had an Atari DOS disc that let me copy discs sector by sector in stead of file by file.

I think it was 2.0j or 2.5j

Can't find anything with this name so I might be wrong about the name.

I'm pretty sure it was a hacked version of an existing DOS.

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Long John's Dos probably. Not sure if there was ever a 2.5 compatible one.

 

To do entire disk sector copies it's better to use a dedicated program.

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Although I have no info to back me up, I'd bet the Atari 8-bit line had more DOS types, versions and hacked variations than any other computer ever. I hazard a guess that I've encountered several dozen different DOS's myself, and I'm sure I've missed some.

Edited by Gunstar

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Long John's Dos probably. Not sure if there was ever a 2.5 compatible one.

 

To do entire disk sector copies it's better to use a dedicated program.

 

I have a number of DOS variants including a "DOS 2.5f" that says "Modified by L J Silver"

 

post-30400-0-88347200-1504535542_thumb.png

 

In the same archive, there are variants called "DOS 2.6f" and "DOS 2.8f."

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