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The latest info from the "NTDEV" new group of OSR's technical web site OsrOnline

Last Build Date: Tue, 20 Feb 2018 16:30:00 EDT

Copyright: Copyright 2005-2010, OSR Open Systems Resources, Inc.

Need help with windows audio driver (8 msgs)

Tue, 20 Feb 2018 12:52:00 EDT

Hi, I'm new in driver development. I need to read data from an analog-to-digital converter on a sound card when the microphone is muted, if it is possible of course. As I understand, I should get a noise on the sound card. How could I do this at the ...

Is it allowed to use shared libs[Dll]/dynamic linking with UMDF Drivers (6 msgs)

Mon, 19 Feb 2018 00:12:00 EDT

Hello, I have a UMDF 2.15 driver and needed to modify it to use some functionality that is provided by a 3rd party. This functionality is provided both as a static lib and as a shared lib[Dll]. I modified the driver to call the appropriate function...

Are Dpcs and IRPs serialized? (4 msgs)

Tue, 20 Feb 2018 12:15:00 EDT

Two questions here, one about Dpc and the other about IRP. (1) Can a driver have two CustomDpc functions running at the same time? I realize that since they run at DISPATCH_LEVEL, they will be serialized on the same processor. But what about diffe...

driver package type

Thu, 15 Feb 2018 13:24:00 EDT

What should be the driver package type for a driver of class 'System' and a class 'Volume'? ...

Keyboard filter driver scan code mapping to vk (3 msgs)

Thu, 15 Feb 2018 09:45:00 EDT

If we want to change in the filter driver the keyboard codes we write scan codes. Before the scan code reached the User mode it is translated to virtual code vk. If we look at the vk table there are unassigned values e.g. 0x3A - 0x40. Under user mo...