| UID | title | description | old-location | tech.root | ms.date | keywords | ms.keywords | req.header | req.include-header | req.target-type | req.target-min-winverclnt | req.target-min-winversvr | req.kmdf-ver | req.umdf-ver | req.ddi-compliance | req.unicode-ansi | req.idl | req.max-support | req.namespace | req.assembly | req.type-library | req.lib | req.dll | req.irql | targetos | req.typenames | f1_keywords | topic_type | api_type | api_location | api_name | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
NF:video.VideoPortReadPortUlong |
VideoPortReadPortUlong function (video.h) |
The VideoPortReadPortUlong function reads a ULONG value from a mapped I/O port. |
display\videoportreadportulong.htm |
display |
05/10/2018 |
|
VideoPortReadPortUlong, VideoPortReadPortUlong function [Display Devices], VideoPort_Functions_347d0c32-a4b6-4061-bbd5-16325e0e3af6.xml, display.videoportreadportulong, video/VideoPortReadPortUlong |
video.h |
Video.h |
Desktop |
Available in Windows 2000 and later versions of the Windows operating systems. |
Videoprt.lib |
Videoprt.sys |
See Remarks section. |
Windows |
|
|
|
|
|
The VideoPortReadPortUlong function reads a ULONG value from a mapped I/O port.
Pointer to the port. The given Port must be in a mapped I/O-space range returned by VideoPortGetDeviceBase.
VideoPortReadPortUlong returns the ULONG value read from the adapter.
A miniport driver's HwVidInterrupt or HwVidSynchronizeExecutionCallback function can call VideoPortReadPortUlong.
Callers of VideoPortReadPortUlong can be running at any IRQL, provided that the memory pointed to by the Port parameter is resident, mapped device memory.