READ_PORT_UCHAR routine

The READ_PORT_UCHAR routine reads a byte from the specified port address.

Syntax


UCHAR READ_PORT_UCHAR(
  _In_ PUCHAR Port
);

Parameters

Port [in]

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

Return value

READ_PORT_UCHAR returns the byte that is read from the specified port address.

Remarks

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

Requirements

Target platform

Universal

Version

Available starting with Windows 2000.

Header

Wdm.h (include Wdm.h, Ntddk.h, or Ntifs.h)

Library

Hal.lib

IRQL

Any level (see Remarks section)

 

 

Send comments about this topic to Microsoft

Show: