## Using Your DDK

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### NEC CD-ROM Filter

Driver Description:

The NEC CD-ROM Filter is a special class of device driver for NEC OEM. This filter provides the generic value-added services, such as data stripping or encryption. It also provides device-specific services, such as an adapter device driver to support a particular type of device.

The interfaces between device manager and CD-ROM filter are identical to the interfaces between device managers and ordinary device drivers. Filter drivers differ from ordinary drivers in that they normally do not manage hardware directly.

Compilers/Assemblers Required:

           Microsoft MASM 5.1  (supplied with the DDK)
           Microsoft C 6.0

Build Instructions:

1.Set the environment variables so the correct tools are picked up during the build.

    e.g., SET PATH=<drive>:\DDK\TOOLS;%PATH%

Where <drive> represents your DDK installed drive and DDK represents the DDK installed directory. On the CD-ROM, the TOOLS directory path is DDK\ TOOLS.

2.Before the FIRST build is attempted, run (only once) the COPYC60.CMD REXX command file in the DDK\TOOLS directory. This command copies the set of needed files from your copy of the Microsoft C 6.0 compiler to the proper directories under the DDK base directory.

    e.g., COPYC60 <MSCdrive>:\'MSC60' <drive>:\DDK

Where <MSCdrive> represents the Microsoft C 6.0 installed drive and 'MSC60' represents the Microsoft C 6.0 installed directory, <drive> represents your DDK installed drive and DDK represents the DDK installed directory.

To build the NEC CD-ROM Filter:

3.Change the directory to DDK\BASE\SRC\DEV\DASD\CDROM\NEC.

4.Invoke NMAKE on the resident makefile.
Files Created by Successful Build:

         Directory:  \DDK\BASE\SRC\DEV\DASD\CDROM\NEC

         o  NECCDS1.FLT