Path: utzoo!utgpu!utorvm!ryerson!acps2924
Date: Sunday, 13 Jan 1991 14:04:58 EST
From: <ACPS2924@Ryerson.CA>
Message-ID: <91013.140458ACPS2924@Ryerson.CA>
Newsgroups: comp.os.msdos.programmer
Subject:    INT9 replacement with C

OK this is my problem,
I'm writing an event manager in Turbo C++(1.00) and need to capture the
users keystrokes as soon as they occur.  I figured the best place would
be to write an extension to INT9. My extension calls the old INT9 and then
INT16 to get the keystroke.  Lo and behold the system hangs.

Any suggestions,code fragments or even assembly would help.
I'm not really up to rewriting the INT9 handler, assembler is only
mediocre...

I've read that INT9 calls INT15 as a hook but that this is of no practical
value because of INT21 problems,  the hook may never get called.

Any suggestions as how to write this interrupt routine, or guidelines in
general about writing interrupts, general do's and don'ts.

Peter
ACPS2924@ryerson.ca