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Question about VDD's

 
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Old 10-11-2003, 03:41 PM   #1
Reiner Ziegler
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Default Question about VDD's


Hi there,

I have a question about "Virtual Device Drivers" (VDD's)
in Microsoft Operating Systems based on the NT-architecture.

Is it possible to intercept BIOS-calls (in my case INT 13h)
of an old 16-bit (MS-DOS) Application running in a "DOS-Box"
and redirect these calls to my 32-bit Device driver?

Is it further possible to "chain" these calls, so that
I can process only the sub-functions of INT 13h that my
Device Driver can handle (in my case only the floppy-calls)
and "forwarding" other calls to the original handler?

The VDD.. functions documented in the DDK offers only Hook-Functions
based on I/O-Ports and Device-Memory.

Thanks in advance

Reiner


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