VideoPortWritePortBufferUchar - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// video.h

VIDEOPORT_DEPRECATED VIDEOPORT_API VOID VideoPortWritePortBufferUchar(
       PUCHAR Port,
  [in] PUCHAR Buffer,
       ULONG  Count
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-video-videoportwriteportbufferuchar)

VideoPortWritePortBufferUchar function

Description

The VideoPortWritePortBufferUchar function writes a number of bytes to a mapped I/O port.

Parameters

Port

Pointer to the port. The given Port must be in a mapped I/O-space range returned by VideoPortGetDeviceBase.

Buffer [in]

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 VideoPortWritePortBufferUchar.

Callers of VideoPortWritePortBufferUchar can be running at any IRQL, provided that the memory pointed to by the Buffer parameter is resident and that pointed to by the Port parameter is resident, mapped device memory.

See also

VideoPortGetDeviceBase

View the official Windows Driver Kit DDI reference

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