From:	Endlisnis <s257m AT unb DOT ca>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Testing for a key in an inline assembly loop
Date:	Sat, 08 Aug 1998 15:46:27 -0300
Organization:	NBTel Internet
Lines:	22
Message-ID:	<35CC9D03.81A24950@unb.ca>
References:	<6qh8i2$mf$1 AT news2 DOT saix DOT net>
NNTP-Posting-Host:	fctnts13c58.nbnet.nb.ca
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Rylan wrote:

> Hi,
> How can I test for a key press in an inline assembly loop in DJGPP? I tried
> using a __dpmi_int call, which works fine for int 16h function 0x00 which
> waits until a key is pressed, then continues, so my interrupt setup seems to
> work. But when I try function 0x01 of int 16h, which sets the zero flag if a
> key has been pressed, how can I test the flags set by an int executed for me
> by __dpmi_int? 'Cause it seems that __dpmi_int alters them on exit of
> itself?

    You pass the address of a __dpmi_regs variable to the function don't you?
You would have to as far as I understand.  When the function returns, the value
of the flags should be in regs.flags (or something like that, it is in dpmi.h).

--
     (\/) Endlisnis (\/)
          s257m AT unb DOT ca
          Endlisnis AT GeoCities DOT com
          Endlis AT nbnet DOT nb DOT ca

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