WRITE_PORT_UCHAR function (wdm.h)

The WRITE_PORT_UCHAR routine writes a byte to the specified port address.

Syntax

NTHALAPI VOID WRITE_PORT_UCHAR(
  [in] PUCHAR Port,
  [in] UCHAR  Value
);

Parameters

[in] Port

Pointer to the port, which must be a mapped memory range in I/O space.

[in] Value

Specifies a byte to be written to the port.

Return value

None

Remarks

Callers of WRITE_PORT_UCHAR can be running at any IRQL, assuming the Port is resident, mapped device memory.

Requirements