[comp.sys.ibm.pc] A Question about MS-DOS-Interrupt 2Fh.

wetzel@iravcl.ira.uka.de (05/20/88)

A nice guy recently told me about the MS-DOS-Interrupt 2Fh.
He said it may be used to communicate with memory-resident
programs.
My problem is: that's a DOS internal int. and therefore it is
not documented.
The only documentation I found is something about the way
PRINT.COM uses this interrupt, but not more.
Is this the legal way to communicate with memory-resident
programs beside using own interrupt-numbers ? 
Who can help me ?

Thanks in advance ... marvin.

P.S.: I'am working with MS-DOS 3.3


===================
Ludger Wetzel     =
Hirschstrasse 103 =
D-7500 Karlsruhe  =
West-Germany      =
===================

carl@imagen.UUCP (Carl Stehle) (05/24/88)

in article <134@iravcl.ira.uka.de>, wetzel@iravcl.ira.uka.de says:
> Posted: Fri May 20 12:57:52 1988
> Organisation: Universitaet Karlsruhe, IRA, F.R. Germany
> 
> A nice guy recently told me about the MS-DOS-Interrupt 2Fh.
> Ludger Wetzel     =
> Hirschstrasse 103 =
> D-7500 Karlsruhe  =
> West-Germany      =
>  ===================

Interupt 2FH is documented in the DOS Technical Reference Manual (p.6-28).
It is intended for application-application communications.
Here at IMAGEN, we use it in our PC Publisher Kit product and
it works quite well. I suggest that you make the function code
programmable so that no conflicts with existing software will occur.

Carl Stehle
IMAGEN Corp.
.