Device Drivers

Handling PCI interrupts
I have a PCI board supports four software interrupts. When an interrupt is triggered (PCI device -> Windows), my driver reads a data structure from a predetermined (fixed) address inside the PCI device, and included in the structure is the address and length of data that should be read. I'd really like to pas... 1 Jun 2008 23:54

Question about structure object copy
Hi I find that some sample write some code like this typedef struct _X { int a; int b; } X; struct X A,B; A.a = 1; A.b = 2; ...... B=A; I found this code works and I can change struct to class and test object copy in C++ sample. I used to think we should use memcpy for str... 30 May 2008 12:41

WDF Kernel Mode function question ..
Hi I find MS KMDF sample include wdf.h instead of wdm.h . Can we still use RTLxxx Kexxx Zwxxx Ioxxx functions in KMDF ? How about WRITE_REGISTER_UCHAR and WRITE_PORT_BUFFER_UCHAR , can these functions be used in KMDF too ? Thank you . ... 29 May 2008 15:23

Display driver install hangs in an RDP session
When we install our display driver using the Control Panel "Add Hardware Wizard" in an RDP session (i.e. running Remote Desktop Connection to a Windows PC) the wizard hangs after copying the driver files. This problem does not happen if you install the display driver in the same manner, but via a console sess... 29 May 2008 10:46

How to get COM port that modem is attached to?
Hi, I'm using ... SetupDiGetDeviceRegistryProperty( hDevInfo, &sdd, SPDRP_FRIENDLYNAME, NULL, (LPBYTE)szFriendlyName, sizeof(szFriendlyName), NULL); .... to get friendly name of the modem device. How can I get the COM port that the modem is attached to? Lisa ... 29 May 2008 08:43

How can I filter disk instances in diskperf?
I want to perform certain action on the traffic going to a specific physical drive. How can I do that in diskperf (the upper filter driver)? There are multiple physical hard drives in my system. How can I identify the required disk in AddDevice () routine. Thanks. ... 28 May 2008 17:24

Readydrive and defragmentation;
How does vista's readydrive deals with continuous defragmentation process running in the background? readydrive pins a sectors (LBAs) corresponding to more likely to be used files but defragmentation process may change the sectors on which the original files were residing. Does readydrive continuously pins/unpins t... 29 May 2008 12:49

Using difx:Driver in WiX to install a device driver with subdirectories
I'm trying to create an MSI, using WiX to install a device driver that have i386/ and amd64/ directories off the main driver directory (containing the ..INF file). I use the difx:Driver tag in the component containing the .INF file to have it copied to System32/DriverStore/, but I don't know how to get the subd... 28 May 2008 16:37

DHPDEV, PPDEV, and HDEV structure
Can someone help me point to where to look in terms of documentation on those three device structures? I'm having a lot of trouble finding them on MSDN documentation. Thanks. ... 31 May 2008 14:50

minifilter context question
Does the FLT_FILE_CONTEXT and the FLT_STREAM_CONTEXT support context per FILE_OBJECT (i.e. per process) or does it track this per FCB (across processes) ? So if process A and process B open a file foo.txt, I will see 2 irp_mj_create calls in my minifilter. If I want to track file_context, will I end up wi... 28 May 2008 23:40