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The VideoPortWriteRegisterUchar function writes a byte to a mapped register.
Syntax
VIDEOPORT_DEPRECATED VIDEOPORT_API VOID VideoPortWriteRegisterUchar(
PUCHAR Register,
UCHAR Value
);
Parameters
Register
Pointer to the register. The given Register must be in a mapped memory-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 VideoPortWriteRegisterUchar.
Callers of VideoPortWriteRegisterUchar 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 | Any level (see Remarks section) |