VideoPortReadRegisterUchar function (video.h)

Article
02/22/2024

The VideoPortReadRegisterUchar function reads a byte from a mapped register.

Syntax

VIDEOPORT_DEPRECATED VIDEOPORT_API UCHAR VideoPortReadRegisterUchar(
  PUCHAR Register
);

Parameters

Register

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

Return value

VideoPortReadRegisterUchar returns the byte read from the adapter.

Remarks

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

Callers of VideoPortReadRegisterUchar 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	See Remarks section.