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This header defines function prototypes for accessing I/O ports and memory on I/O adapters.
For information about accessing device registers, see:
ioaccess.h contains the following programming interfaces:
Functions
| READ_PORT_UCHAR The READ_PORT_UCHAR function (ioaccess.h) returns a byte that is read from the specified port address in resident, mapped device memory. |
| READ_PORT_ULONG The READ_PORT_ULONG function (ioaccess.h) returns a ULONG value that is read from the specified port address in resident, mapped device memory. |
| READ_PORT_USHORT The READ_PORT_USHORT function (ioaccess.h) returns a USHORT value that is read from the specified port address in resident, mapped device memory. |
| WRITE_PORT_UCHAR The WRITE_PORT_UCHAR function (ioaccess.h) writes a byte to the specified port address in resident, mapped device memory. |
| WRITE_PORT_ULONG The WRITE_PORT_ULONG function (ioaccess.h) writes a ULONG value to the specified port address in resident, mapped device memory. |
| WRITE_PORT_USHORT The WRITE_PORT_USHORT function (ioaccess.h) writes a USHORT value to the specified port address in resident, mapped device memory. |