Device Drivers

Memory Mapped IO Read Write
Hi I have PCI NIC card. This crad does not have Port reange. This card is having only memory mapped region. I used NdisMMapIoSpace api in order to get virtual address. I want to read and write somthing on Virtual Address. Does NDIS support any apis for it or there is any special way? -- With regards tha... 6 Oct 2006 14:30

IoQueryFileDosDeviceName
Dear all, I am using IoQueryFileDosDeviceName but the documentation does not explicitly say whether I should use ExFreePool to release the ObjectNameInformation buffer returned. Looking at the buffer with !pool and stepping through IoQueryFileDosDeviceName it seems the buffer is infact a paged pool buffer ... 3 Oct 2006 09:54

ZwQueryInformationFile(..FileAlignmentInformation..) always returns FILE_WORD_ALIGNMENT
Greetings I'am assuming ZwQueryInformationFile(..FileAlignmentInformation..) to always return FILE_BYTE_ALIGNMENT(0) for files opened without FILE_NO_INTERMEDIATE_BUFFERING and FILE_512_BYTE_ALIGNMENT(0x1ff) for files opened with FILE_NO_INTERMEDIATE_BUFFERING on sector size = 512 but for me the return ... 1 Oct 2006 06:52

Using section/view in the driver
Can I call ZwCreateSection() and ZwMapViewOfSection() with the same handle in the different processes ? -Gary ... 29 Oct 2006 16:38

USB Video extension units
I cannot access UVC extension units using DirectShow IKsControl::KsProperty. When I try doing KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_TOPOLOGY on PropertyId 0, I get back the extension unit GUID and seven additional bytes (1,1,3,2,1,0,6) which do not seem to be defined in the DDK. PropertyId 1 returns error 0x8007... 28 Sep 2006 22:32

signtool cli
Hello, I can't seem to use the command line interface with signtool because: SignTool Error: No certificates were found that met all the given criteria. The only thing I can think of is that the name has a comma in it? signtool sign /v /s my /n Acme, Inc. /t http://timestamp.verisign.com/scripts/timestamp... 23 Oct 2006 21:03

Barcode scanner problem
Hi all, does anybody has the manual for the SD300 SmartPro CCD barcode scanner? I want to hit some special keys like "F1" or "CTR-S" with the barcode scanner... Thank you! Bastien ... 24 Sep 2006 13:53

deviceiocontrol fails for bus driver
We currently have a functional bus driver that was installed under the system class. Most of the functionality for the driver has been accessed via an API that makes ioctl calls. Recently, we've created a miniport driver to sit on top of this bus driver so that the bus driver can hook into the Windows network s... 1 Oct 2006 20:47

USB suspend issues
I'm using the microchip custom firmware with my USB device and I'm having problems with the the computer constantly trying to suspend the device. It makes the device respond slowly and sporadically. When I uncheck the box "Allow the computer to turn this device off to save power" in the Power Management tab of th... 12 Sep 2006 16:05

__readmsr and __writemsr usage
HI, Has anyone used "__readmsr and __writemsr" while writing device drivers for windows. These are intrinsic functions in VC++. Not sure how to use it to read MSR values. A sample code demonstrating these command will be helpful. When I try to use them I get a bunch of Linking errors. Thanks NM ... 7 Sep 2006 19:04