Aric Stewart wrote:
I do have some difficulty figuring out how win2k is translating vender and product ids into class and interface guids. The documentation reports that they look them up in inf files, however i am finding that not to be true. I am suspecting that some may be hardcoded in the usb support somewhere.
Wouldn't that be something which would be put in the registry somehow for the well known IDs and for the rest I really assume the device detection routine does check for all .inf files it finds on the devices currently configured to be searched. If you look at PCI and USB inf files you will notice that the manufacturer and device ID are actually encoded in the key names which are to be added to the registry. That encoding does not always seem to be equally consistent, I've seen at least two different types, but it is obviously there.
One entry for instance for the Logitec PageScanner would be
%USB\VID_046D&PID_040f.DeviceDesc%=Model.PageScan_USB,USB\VID_046D&PID_040f
USB\VID_046D&PID_040f.DeviceDesc="Storm Technology - Logitech PageScan USB"
This is partly extracted from a logiscan.inf file on my W2K system.
Rolf Kalbermatter
Right, that is the theory but something else must be happening also. For example with the iPod (what i am concentrating on) the vendor id is 0x05ac which somehow translates to VEN_APPLE and the product id of 0x1201 somehow translates to PROD_IPOD however i cannot find any inf file or registry key that would show that transition.
-aric
Rolf Kalbermatter wrote:
Aric Stewart wrote:
I do have some difficulty figuring out how win2k is translating vender and product ids into class and interface guids. The documentation reports that they look them up in inf files, however i am finding that not to be true. I am suspecting that some may be hardcoded in the usb support somewhere.
Wouldn't that be something which would be put in the registry somehow for the well known IDs and for the rest I really assume the device detection routine does check for all .inf files it finds on the devices currently configured to be searched. If you look at PCI and USB inf files you will notice that the manufacturer and device ID are actually encoded in the key names which are to be added to the registry. That encoding does not always seem to be equally consistent, I've seen at least two different types, but it is obviously there.
One entry for instance for the Logitec PageScanner would be
%USB\VID_046D&PID_040f.DeviceDesc%=Model.PageScan_USB,USB\VID_046D&PID_040f
USB\VID_046D&PID_040f.DeviceDesc="Storm Technology - Logitech PageScan USB"
This is partly extracted from a logiscan.inf file on my W2K system.
Rolf Kalbermatter
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Aric Stewart -
Rolf Kalbermatter