Function Calls

I/O operations use the following calls. See Kernel Folio Calls, in the 3DO System Programmer's Reference for complete details on these calls.

Opening and Closing Devices

The following calls open and close devices:

CloseNamedDevice() Closes a device previously opened with OpenNamedDevice().
FindDevice() Returns the item number of a device.
FindAndOpenDevice() Finds and opens a device item.
OpenNamedDevice() Opens a named device.

Creating, Deleting, and Creating Pointers for IOReqs

The following calls handle IO requests:

CreateIOReq() Creates an I/O request.
DeleteIOReq() Deletes an I/O request.
LookupItem() Gets a pointer to an item.

Controlling the I/O Process

The following calls handle I/O processes:

AbortIO() Aborts an I/O operation.
CheckIO() Checks if an asynchronous I/O request has completed.
DoIO() Performs synchronous I/O.
SendIO() Requests asynchronous I/O.
WaitIO() Waits for an asynchronous I/O request to complete.