On 2/20/2023 11:58 AM, Aitor Santamaría wrote:
Thanks, Ralf!!
So I thought, but I have read a couple of references (such as the
following in Wikipedia, but not the only one) by which the IFS was
present in MS-DOS 4.X, of course as well as in OS/2 and Windows:
Installable File System - Wikipedia
<https://en.wikipedia.org/wiki/Installable_File_System>
Apparently, there was some support for it that was probably removed
for MS-DOS 5.0 and later. Part of the mystery (to me) of MS-DOS 4.X! :)
In RBIL, the only reference I've found is to IFSHLP.SYS, which was a
Windows mean to guess what has been installed before getting into
protected mode, so I am not sure is if this has to be with the IFS
that was planned and implemented in MS-DOS 4.0.
Windows and OS/2 are totally different ball games. In DOS, as long as I
can remember, only the network redirector existed. That MSCDEX.TXT that
I mentioned I think tries to explain that as well...
Don't recall when MSCDEX first showed up, but I think it was after the
networking redirector stuff (for both Novell and LanManager) in MS-DOS 3.0.
Ralf
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