Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!mailrus!husc6!m2c!wpi!hmatisa
From: hmatisa@wpi.wpi.edu (Huzrei M. Isa)
Newsgroups: comp.lang.pascal
Subject: capturing INT 9
Message-ID: <14381@wpi.wpi.edu>
Date: 5 Aug 90 18:23:53 GMT
Distribution: usa
Organization: Worcester Polytechnic Institute, Worcester, Mass.
Lines: 27


Hello,

I would like to check for specific key everytime the keyboard is
pressed.  In order to do this, my intuition told me that I can
capture the keyboard interrupt vector(int 9), examine the key, and if that
is the key that I want, my program will execute a subroutine.

This problem is, if the key is not what I want, I'll have to pass
execution back to the original keyboard interrupt handler...
Questions :

How do I do that in Pascal?  How do I get the instruction pointer to
goto original keyboard interrupt vector and then jump back into my
program?   Is there any way I can do it without plunging into massive
assembly language code?  I know 8088 assembly language but not much...

Nope, I'm not writing a memory resident program.  I'd like to use
this feature in my user interface code where the user can press i.e.
ALT-F in the middle of doing `other' things and `suddenly' a file
directory (or whatever) appear onscreen.

				Thanks.
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