#ifndef RESOURCES_DISK_H
#define RESOURCES_DISK_H

/*****************************************************************
*                                                                *
* Copyright (C) 1985, Commodore Amiga Inc.  All rights reserved. *
*                                                                *
*****************************************************************/


/****************************************************************
*
* discresource.h -- external declarations for disc resources
*
* SOURCE CONTROL
* ------ -------
* $Header: disk.h,v 27.2 85/07/12 23:12:44 neil Exp $
*
* $Locker:  $
*
****************************************************************/

#ifndef EXEC_TYPES_H
#include "exec/types.h"
#endif !EXEC_TYPES_H

#ifndef EXEC_LISTS_H
#include "exec/lists.h"
#endif !EXEC_LISTS_H

#ifndef EXEC_PORTS_H
#include "exec/ports.h"
#endif !EXEC_PORTS_H

#ifndef EXEC_INTERRUPTS_H
#include "exec/interrupts.h"
#endif !EXEC_INTERRUPTS_H

#ifndef EXEC_LIBRARIES_H
#include "exec/libraries.h"
#endif !EXEC_LIBRARIES_H


/********************************************************************
*
* Resource structures
*
********************************************************************/


struct DiscResourceUnit {
    struct Message dru_Message;
    struct Interrupt dru_DiscBlock;
    struct Interrupt dru_DiscSync;
    struct Interrupt dru_Index;
};

struct DiscResource {
    struct Library              dr_Library;
    struct DiscResourceUnit     *dr_Current;
    UBYTE                       dr_Flags;
    UBYTE                       dr_pad;
    struct Library              *dr_SysLib;
    struct Library              *dr_CiaResource;
    ULONG                       dr_UnitID[4];
    struct List                 dr_Waiting;
    struct Interrupt            dr_DiscBlock;
    struct Interrupt            dr_DiscSync;
    struct Interrupt            dr_Index;
};

/* dr_Flags entries */
#define DRB_ALLOC0      0       /* unit zero is allocated */
#define DRB_ALLOC1      1       /* unit one is allocated */
#define DRB_ALLOC2      2       /* unit two is allocated */
#define DRB_ALLOC3      3       /* unit three is allocated */
#define DRB_ACTIVE      7       /* is the disc currently busy? */

#define DRF_ALLOC0      (1<<0)  /* unit zero is allocated */
#define DRF_ALLOC1      (1<<1)  /* unit one is allocated */
#define DRF_ALLOC2      (1<<2)  /* unit two is allocated */
#define DRF_ALLOC3      (1<<3)  /* unit three is allocated */
#define DRF_ACTIVE      (1<<7)  /* is the disc currently busy? */



/********************************************************************
*
* Hardware Magic
*
********************************************************************/


#define DSKDMAOFF       0x4000  /* idle command for dsklen register */


/********************************************************************
*
* Resource specific commands
*
********************************************************************/

/*
 * DISKNAME is a generic macro to get the name of the resource.
 * This way if the name is ever changed you will pick up the
 *  change automatically.
 */

#define DISKNAME        "disk.resource"


#define DR_ALLOCUNIT    (LIB_BASE - 0*LIB_VECTSIZE)
#define DR_FREEUNIT     (LIB_BASE - 1*LIB_VECTSIZE)
#define DR_GETUNIT      (LIB_BASE - 2*LIB_VECTSIZE)
#define DR_GIVEUNIT     (LIB_BASE - 3*LIB_VECTSIZE)
#define DR_GETUNITID    (LIB_BASE - 4*LIB_VECTSIZE)


#define DR_LASTCOMM     (DR_GIVEUNIT)

/********************************************************************
*
* drive types
*
********************************************************************/

#define DRT_AMIGA       (0x00000000)
#define DRT_37422D2S    (0x55555555)
#define DRT_EMPTY       (0xFFFFFFFF)

#endif RESOURCES_DISK_H