NdisRawReadPortUchar

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

At a Glance

Syntax

VOID NdisRawReadPortUchar( IN ULONG Port, OUT PUCHAR Data );

Parameters

Port

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

Data

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

Remarks

This function runs faster than the NdisImmediateReadPortUchar function because it need not map a bus-relative I/O 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, NdisRawReadPortUlong, NdisRawReadPortUshort, NdisRawWritePortUchar