NdisRawWritePortBufferUchar

This function writes a specified number of bytes from a caller-supplied buffer to a given I/O port.

At a Glance

Header file:	Ndis.h
Windows CE versions:	2.0 and later

Syntax

VOID NdisRawWritePortBufferUchar( IN ULONG Port,
IN PUCHAR Buffer, IN ULONG Length );

Parameters

Port: Specifies the I/O port. This address falls in a range that was mapped during initialization with the NdisMRegisterIoPortRange function.
Buffer: Pointer to a caller-allocated resident buffer containing the bytes to be written.
Length: Specifies the number of bytes to write to the I/O port.

Remarks

An NIC driver calls this function to transfer a sequence of bytes, one at a time, to its NIC.

This function runs significantly faster than the NdisImmediateWritePortBufferUchar function because it need not map a bus-relative port address onto a host-dependent logical port address at every call.

A driver that calls this function can run at any IRQL.