🚀 go-pugleaf

In article <jbf6cm79f@tmsoft.uucp>, mshiels@tmsoft.uucp (Michael A. Shiels) wrote:
}Does DOS do it's own semaphoring with INT 2A AX=80xx/AX=81xx to ensure you
}don't swap in the middle of a drive read/write?

Not really.  DOS protects a few sections of code that absolutely
positively cannot be reentered.  Much of the SHARE.EXE code consists of
such critical sections--wouldn't want to interrupt the search whether a
file is currently open with an open of that file, would we?  However,
DOS itself does not check the semaphores at all.  That is left up to
whatever software is doing the reentering (that software also has to
maintain the semaphores itself).

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