## Using Your DDK

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### Virtual Video Display Driver

Driver Description:

Virtual device drivers are used as virtual display devices for DOS applications running in DOS sessions. Virtual device drivers are required when it is necessary for multiple DOS sessions to share one or more video devices. A separate driver is provided for each of the commonly used video devices.

Compilers/Assemblers Required:

         Microsoft MASM 5.1  (supplied with the DDK)
         Microsoft CL386     (supplied with the DDK)

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.Change the directory to DDK\VIDEO\SRC\VIDEO\VDEV\VVIDEO.

3.To build the retail version, invoke NMAKE with target RETOS2C on the resident makefile.

4.To build the debug version, invoke NMAKE with target DBGOS2C on the resident makefile.

Files Created By Successful Build:

         Retail Version:
         Directory:  \DDK\VIDEO\REL\OS2C\RETAIL\BASE\OS2\MDOS

         o  V8514A.SYS
         o  VCGA.SYS
         o  VEGA.SYS
         o  VMONO.SYS
         o  VSVGA.SYS
         o  VSVGAJ.SYS
         o  VSVGAK.SYS
         o  VVGA.SYS
         o  VVGAJ.SYS
         o  VVGAK.SYS

         Debug Version :
         Directory:  \DDK\VIDEO\REL\OS2C\DEBUG\BASE\OS2\MDOS

         o  V8514A.SYS
         o  VCGA.SYS
         o  VEGA.SYS
         o  VMONO.SYS
         o  VSVGA.SYS
         o  VSVGAJ.SYS
         o  VSVGAK.SYS
         o  VVGA.SYS
         o  VVGAJ.SYS
         o  VVGAK.SYS