derSammler wrote:That said, the way "Previous DOS version" works in Win9x is quite weird.
I second that. It only works if the partition is not using FAT32 filesystem also.
From what I vaguely remember (please double-check!), DOS 7 has an altered boot loader code.
It can find its system files anywhere on the partition, including in sub directories.
By comparison, DOS 6.x requires them to be located on a fixed location on the partition.
So if one of them gets moved around accidently, except command.com, maybe, DOS 6.x can't boot anymore.
(This could happen because of third-party disk fragmenters etc.)
That's why it can chain load MS-DOS 6.x also, I believe.
The old system is stored in/loaded from a binary file.
Again, I'm speaking under correction here.
In the end it's all preference, I guess. Some people just like to continue DR-DOS,
PC-DOS, MS-DOS because they are used to it, rather than using it because of technical reasons.
To their defense, MS-DOS 6.x comes with a full set of utilies, from which some of them check the DOS version number.
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