NdisReadPortBufferUchar function

Article
06/19/2017

Note NDIS 5. x has been deprecated and is superseded by NDIS 6. x. For new NDIS driver development, see Network Drivers Starting with Windows Vista. For information about porting NDIS 5. x drivers to NDIS 6. x, see Porting NDIS 5.x Drivers to NDIS 6.0.

NdisReadPortBufferUchar is called by the miniport driver to read a specified number of UCHARs from a NIC into a buffer.

Syntax

VOID NdisReadPortBufferUchar(
  _In_  NDIS_HANDLE NdisAdapterHandle,
  _In_  ULONG       Port,
  _Out_ PUCHAR      Buffer,
  _In_  ULONG       Length
);

Parameters

NdisAdapterHandle [in]
Specifies the handle that the NDIS interface library associates with the network interface card.
Port [in]
Specifies the I/O port.
Buffer [out]
Pointer to the caller-supplied buffer in which this function writes the UCHAR values read from Port.
Length [in]
Specifies the number of pieces of data to read from Port to Buffer.

Return value

None

Remarks

NdisReadPortBufferUchar reads sequentially each byte from the port. It determines how the host accesses the I/O port and processes the read request accordingly.

Requirements

Target platform	Desktop
Version	Not supported for NDIS 6.0 drivers in Windows Vista. Supported for NDIS 5.1 drivers (see NdisReadPortBufferUchar (NDIS 5.1)) in Windows XP.
Header	Ndis.h (include Ndis.h)
IRQL	Any level

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