VideoPortWriteRegisterBufferUchar function (video.h)
The VideoPortWriteRegisterBufferUchar function writes a number of unsigned bytes to a mapped register.
Syntax
VIDEOPORT_DEPRECATED VIDEOPORT_API VOID VideoPortWriteRegisterBufferUchar(
PUCHAR Register,
[in] PUCHAR Buffer,
ULONG Count
);
Parameters
Register
Pointer to the register. The given Register must be in a mapped memory-space range returned by VideoPortGetDeviceBase.
[in] Buffer
Pointer to a buffer containing the bytes to be written.
Count
Specifies the number of bytes to be transferred to the adapter.
Return value
None
Remarks
A miniport driver's HwVidInterrupt or HwVidSynchronizeExecutionCallback function can call VideoPortWriteRegisterBufferUchar.
Callers of VideoPortWriteRegisterBufferUchar can be running at any IRQL, provided that the memory pointed to by the Buffer parameter is resident and that pointed to by the Register parameter is resident, mapped device memory.
Requirements
Requirement | Value |
---|---|
Minimum supported client | Available in Windows 2000 and later versions of the Windows operating systems. |
Target Platform | Desktop |
Header | video.h (include Video.h) |
Library | Videoprt.lib |
DLL | Videoprt.sys |
IRQL | Any level (see Remarks section) |
See also
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