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- Newsgroups: comp.os.msdos.programmer
- Subject: Hooked interrupts fail under Windows/DOS
- Message-ID: <1992Aug31.162117.2194@brandonu.ca>
- From: dueck@brandonu.ca
- Date: 31 Aug 92 16:21:16 CST
- Organization: Brandon University, Brandon, Manitoba, Canada
- Lines: 11
-
- I have a TSR that hooks the clock interrupt (8) in order to
- perform a periodic activity. When in the DOS shell under Windows,
- another program that depends on the value of the clock bytes in the
- DOS segment fails because the clock bytes never get changed.
- The second program works properly if the TSR is not loaded before entering
- Windows.
-
- Does anyone have an explanation for this behaviour?
-
- Gery Dueck
- dueck@brandonu.ca
-