Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!munnari.oz.au!metro!ipso!runxtsa!snow
From: snow@runxtsa.runx.oz.au (Ned Snow)
Newsgroups: comp.os.msdos.programmer
Subject: Re: Communicating With Resident Programs
Keywords: driver, TSR, interrupt vectors
Message-ID: <2337@runxtsa.runx.oz.au>
Date: 3 Oct 90 06:32:03 GMT
References: <679@digigw.digital.co.jp>
Organization: RUNX Unix Timeshare.  Sydney, Australia.
Lines: 14

In article <679@digigw.digital.co.jp> gday@digigw.digital.co.jp (Gordon Day) writes:
>Could somebody suggest the best way to communicate with a driver?  I have 
>successfully implemented a block device driver, but I am at a loss as to the
>best way to communicate with it from a transient program.  I have come up 
>
When I implemented a device driver ( to deal with serial input in a C program)
I used the ioctl functions to communicate with it. To do this, you must set
the ioctl bit in the device header, and provide code for the ioctl input
and output functions ( 3 for input, 12 for output ). The transient program
can then use dos function 44h to send/receive strings to/from the driver.

>Gordon W. Day

Ned