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- Newsgroups: comp.lang.modula2
- Path: cix.compulink.co.uk!usenet
- From: mark_tbu@cix.compulink.co.uk ("Mark Morgan Lloyd ")
- Subject: Re: Interrupt Handlers in Topspeed Modula 2 V1.17
- Message-ID: <DozCpx.7B6@cix.compulink.co.uk>
- Organization: KDG Mobrey Telemetry
- References: <496207970wnr@harvey27.demon.co.uk>
- Date: Thu, 28 Mar 1996 13:41:57 GMT
- X-News-Software: Ameol
-
- > There are several things that I can't seem to find explained very well:
- >
- > If I want to write a keyboard interrupt handler, I will want to make it
- > so that when my procedure returns, the registers are modified as if a
- > call to the original handler had occured (at least most of the time,
- > until the right keystroke(s) are entered) how do I do this??
-
- I've done it by inline code to modify the stack.
-
- > The First example modifies the interrupt vector table directly. If i
- > want to use this method, how do I calculate the address for any given
- > interrupt??
-
- You don't. There's a DOS call to do this.
-
- > And lastly: which of the above is the most practical/workable?? I would
- > greatly appreciate a quick pointer in the right direction from someone
- > who has tried this before :-)
-
- I've done it in the past by hooking in a mixture of high-level and
- assembler, but it was not nice. I don't suggest trying IOTRANSFER or
- anything like that- it's not really designed for it.
-
- Mark Morgan Lloyd
- mark_tbu@cix.compulink.co.uk
-
- [Opinions above are the author's, not those of his employers or
- colleagues]
-