Expand Minimize

VideoPortWritePortUchar function

The VideoPortWritePortUchar function writes a byte to a mapped I/O port.

Syntax


VOID VideoPortWritePortUchar(
  PUCHAR Port,
  UCHAR Value
);

Parameters

Port

Pointer to the port. The given Port must be in a mapped I/O-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 VideoPortWritePortUchar.

Callers of VideoPortWritePortUchar can be running at any IRQL, provided that the memory pointed to by the Port 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

Any level (see Remarks section)

See also

VideoPortGetDeviceBase

 

 

Send comments about this topic to Microsoft

Show:
© 2014 Microsoft