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VideoPortWriteRegisterUchar function (video.h)

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The VideoPortWriteRegisterUchar function writes a byte to a mapped register.

Syntax

VIDEOPORT_DEPRECATED VIDEOPORT_API VOID VideoPortWriteRegisterUchar(
  PUCHAR Register,
  UCHAR  Value
);

Parameters

Register

Pointer to the register. The given Register must be in a mapped memory-space range returned by VideoPortGetDeviceBase.

Value

Specifies a byte to be transferred to the adapter.

Return value

None

Remarks

A miniport driver's HwVidInterrupt or HwVidSynchronizeExecutionCallback function can call VideoPortWriteRegisterUchar.

Callers of VideoPortWriteRegisterUchar can be running at any IRQL, provided that the memory 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

VideoPortGetDeviceBase