NdisRawWritePortBufferUchar

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

VOID
  NdisRawWritePortBufferUchar(
    IN ULONG_PTR  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 NdisMRegisterIoPortRange.

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.

Headers

Declared in Ndis.h. Include Ndis.h.

Comments

A NIC driver calls NdisRawWritePortBufferUchar to transfer a sequence of bytes, one at a time, to its NIC.

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

Callers of NdisRawWritePortBufferUchar can run at any IRQL.

See Also

MiniportInitialize, NdisMRegisterIoPortRange, NdisRawReadPortBufferUchar, NdisRawWritePortBufferUlong, NdisRawWritePortBufferUshort, NdisRawWritePortUchar