| 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.VideoPortReadPortUchar |
VideoPortReadPortUchar function (video.h) |
The VideoPortReadPortUchar function reads a byte from a mapped I/O port. |
display\videoportreadportuchar.htm |
display |
05/10/2018 |
|
VideoPortReadPortUchar, VideoPortReadPortUchar function [Display Devices], VideoPort_Functions_128aedd7-fb7b-4e0e-8447-12733a245bc0.xml, display.videoportreadportuchar, video/VideoPortReadPortUchar |
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 VideoPortReadPortUchar function reads a byte 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.
VideoPortReadPortUchar returns the byte read from the adapter.
A miniport driver's HwVidInterrupt or HwVidSynchronizeExecutionCallback function can call VideoPortReadPortUchar.
Callers of VideoPortReadPortUchar can be running at any IRQL, provided that the memory pointed to by the Port parameter is resident, mapped device memory.