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VideoPortReadRegisterUlong function

The VideoPortReadRegisterUlong function reads a ULONG value from a mapped register range.

Syntax


ULONG VideoPortReadRegisterUlong(
  PULONG Register
);

Parameters

Register

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

Return value

VideoPortReadRegisterUlong returns the ULONG value read from the adapter.

Remarks

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

Callers of VideoPortReadRegisterUlong can be running at any IRQL, provided that the memory pointed to by the Register parameter is resident, mapped device memory.

Requirements

Version

Available in Windows 2000 and later versions of the Windows operating systems.

Header

Video.h (include Video.h)

Library

Videoprt.lib

DLL

Videoprt.sys

IRQL

See Remarks section.

See also

HwVidInterrupt
HwVidSynchronizeExecutionCallback
VideoPortGetDeviceBase

 

 

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