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NdisRawReadPortUchar (NDIS 5.1) function

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 x has been deprecated and is superseded by NDIS 6.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.

NdisRawReadPortUchar reads a byte from a given I/O port on the NIC.

Syntax


VOID NdisRawReadPortUchar(
  _In_  ULONG_PTR Port,
  _Out_ PUCHAR    Data
);

Parameters

Port [in]

Specifies the I/O port. This address falls in a range that was mapped during initialization with NdisMRegisterIoPortRange.

Data [out]

Pointer to a caller-supplied variable in which this function returns a byte read in from the port.

Return value

None

Remarks

NdisRawReadPortUchar runs faster than NdisImmediateReadPortUchar because it need not map a bus-relative I/O port address onto a host-dependent logical port address at every call.

Requirements

Target platform

Desktop

Version

See NdisRawReadPortUchar.

Header

Ndis.h (include Ndis.h)

IRQL

Any level

See also

MiniportInitialize
NdisMRegisterIoPortRange
NdisRawReadPortBufferUchar
NdisRawReadPortUlong
NdisRawReadPortUshort
NdisRawWritePortUchar

 

 

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