VideoPortWritePortBufferUchar function (video.h)
The VideoPortWritePortBufferUchar function writes a number of bytes to a mapped I/O port.
Syntax
VIDEOPORT_DEPRECATED VIDEOPORT_API VOID VideoPortWritePortBufferUchar(
PUCHAR Port,
[in] PUCHAR Buffer,
ULONG Count
);
Parameters
Port
Pointer to the port. The given Port must be in a mapped I/O-space range returned by VideoPortGetDeviceBase.
[in] Buffer
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.
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) |