Driver for a controller less modem on Win 2K

NTDEV
1

Hi ,
I am writing a Driver for a controller less modem on Win 2K. I am using a
Win 95/98 “.VxD” which does a similar job, for my reference. However, I do
not know how the driver was installed on Win 95/98.
My design is :

  1. I want to create a WDM Driver which has all the functionality of a
    “Controllerless Modem driver”. In fact, I am unsure of how WDM will help me
    but I have NuMega DriverWorks Wizard which will give me a skeleton WDM
    Function Driver. Hence I am using the same driver to lessen my load of
    coding.
  2. I intend to install such a driver as a “Driver for a Dummy Modem,
    attached to a Dummy COM Port, example : COMx”.
  3. When a user selects this Dummy Modem as THE modem to be used with
    Microsoft Dialup Networking ,(selection done typically in a drop-down list)
    and launches the DUN Connection , the modem starts polling all the actual
    COM Ports, to detect which one has a real modem and when it finds it,
    directs all its data to the Port.
  4. The Driver exposes an interface same as Serial.sys so that any
    application can treat it as a port driver and write/read to/from this port.
  5. The Device Object attached to this Driver is a “place holder” in the
    sense I do not direct any operation to it.
  6. I modified the Wizard-generated INF file to suit a modem’s INF file,
    i.e., added Class GUID of modems, added another entry “Port Driver” with my
    driver’s name as the driver.

The problem I am facing is :

  1. The Installation happens properly, my driver is copied into
    “system32/drivers” directory, in the “properties” of such a dummy modem, my
    driver name does appear, but “modem.sys” also appears. Means, the OS is not
    treating my driver as THE driver for such a modem.
  2. My driver does not show up in the list of drivers currently loaded
    even though my Dummy modem is installed. To see this, I am using “Object
    Viewer”, a utility given by Walter Oney.
  3. My debugger “SoftICE” shows errors in kernel.
  4. I need to reboot the system and uninstall the driver.

My query is :

  1. If I want to write a “Controller-less Modem Driver” on win 2K and
    register it as a driver for a Dummy modem which is attached to a dummy port,
    how should my INF file be ?
  2. Is such a design permitted on Win 2K ?
  3. How to make an application like Microsoft DUN recognize my driver
    and use my driver , when a user selects my “Dummy Modem” in the drop-down
    list of modems ?

I would very much appreciate any information in this regard,
Regards,
Shail.