/*

    File:       i_o.h

    Description:

    Author:     

    Copyright:  Copyright: © 1990-1999 by Apple Computer, Inc.

                all rights reserved.

    Disclaimer: You may incorporate this sample code into your applications without

                restriction, though the sample code has been provided "AS IS" and the

                responsibility for its operation is 100% yours.  However, what you are

                not permitted to do is to redistribute the source as "DSC Sample Code"

                after having made changes. If you're going to re-distribute the source,

                we require that you make it clear in the source that the code was

                descended from Apple Sample Code, but that you've made changes.

    Change History (most recent first):

                6/24/99 Updated for Metrowerks Codewarror Pro 2.1(KG)

*/

OSErr isoOpen(StringPtr fn, short *RefNum);

OSErr isoRead(short referenceNumber, Ptr dest, long count, long offset);

OSErr isoWrite(short referenceNumber, Ptr buffer, long count, long offset);

OSErr ZeroDisk(short referenceNumber);

short GetDriveNumber(short vRefNum);