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.

See Also

NdisMRegisterIoPortRange, NdisRawReadPortBufferUchar, NdisRawWritePortBufferUlong, NdisRawWritePortBufferUshort, NdisRawWritePortUchar