ReadIoSpace

The ReadIoSpace function reads from the system I/O locations.

VOID 
  ReadIoSpace (
    ULONG address,
    PULONG data,
    PULONG size
    );

Parameters

address

Specifies the I/O address to read from.

data

Specifies the address of a variable to hold the data read. This must be at least the number of bytes contained in size.

size

Specifies the address of a variable that contains the number of bytes to read (1, 2, or 4 only). After the data is read, size will contain the number of bytes actually read.

Return Value

None

Comments

If you are writing 64-bit code, you should use ReadIoSpace64 instead. See 32-Bit Pointers and 64-Bit Pointers for details.

Requirements

Headers: Defined in wdbgexts.h. If you are writing a WdbgExts extension, include wdbgexts.h. If you are writing a DbgEng extension that calls this function, include wdbgexts.h before dbgeng.h (see Writing DbgEng Extension Code for details).