#ifndef DOS_FILEHANDLER_H
#define DOS_FILEHANDLER_H 1
/*
** filehandler.h for ACE Basic
**
** Note: Translated to ACE by ConvertC2ACE
**       @ MapMeadow Software, Nils Sjoholm
**
**
** Date: 09/02/95
**
**
*/

/*
** This are the StructPointer defines for filehandler.h
*/
#ifndef DeviceNodePtr
#define DeviceNodePtr ADDRESS
#endif
#ifndef DosEnvecPtr
#define DosEnvecPtr ADDRESS
#endif
#ifndef FileSysStartupMsgPtr
#define FileSysStartupMsgPtr ADDRESS
#endif
/*
** End of StructPointer defines for filehandler.h
*/
       
#ifndef   EXEC_PORTS_H
#include <exec/ports.h>
#endif

#ifndef   DOS_DOS_H
#include <dos/dos.h>
#endif



/* The disk "environment" is a longword array that describes the
 * disk geometry.  It is variable sized,  with the length at the beginning.
 * Here are the constants for a standard geometry.
 */

STRUCT DosEnvec  
    LONGINT de_TableSize       /* Size of Environment vector */
    LONGINT de_SizeBlock       /* in longwords: standard value is 128 */
    LONGINT de_SecOrg          /* not used  must be 0 */
    LONGINT de_Surfaces        /* # of heads (surfaces). drive specific */
    LONGINT de_SectorPerBlock  /* not used  must be 1 */
    LONGINT de_BlocksPerTrack  /* blocks per track. drive specific */
    LONGINT de_Reserved        /* DOS reserved blocks at start of partition. */
    LONGINT de_PreAlloc        /* DOS reserved blocks at end of partition */
    LONGINT de_Interleave      /* usually 0 */
    LONGINT de_LowCyl          /* starting cylinder. typically 0 */
    LONGINT de_HighCyl         /* max cylinder. drive specific */
    LONGINT de_NumBuffers      /* Initial # DOS of buffers.  */
    LONGINT de_BufMemType      /* type of mem to allocate for buffers */
    LONGINT de_MaxTransfer     /* Max number of bytes to transfer at a time */
    LONGINT de_Mask        /* Address Mask to block out certain memory */
    LONGINT  de_BootPri         /* Boot priority for autoboot */
    LONGINT de_DosType         /* ASCII (HEX) string showing filesystem type 
                  * 0X444F5300 is old filesystem, 
                  * 0X444F5301 is fast file system */
    LONGINT de_Baud        /* Baud rate for serial handler */
    LONGINT de_Control         /* Control SHORTINT for handler/filesystem */
    LONGINT de_BootBlocks      /* Number of blocks containing boot code */

END STRUCT 

/* these are the offsets into the array */
/* DE_TABLESIZE is set to the number of longwords in the table minus 1 */

#define DE_TABLESIZE    0   /* minimum value is 11 (includes NumBuffers) */
#define DE_SIZEBLOCK    1   /* in longwords: standard value is 128 */
#define DE_SECORG   2   /* not used  must be 0 */
#define DE_NUMHEADS 3   /* # of heads (surfaces). drive specific */
#define DE_SECSPERBLK   4   /* not used  must be 1 */
#define DE_BLKSPERTRACK 5   /* blocks per track. drive specific */
#define DE_RESERVEDBLKS 6   /* unavailable blocks at start.  usually 2 */
#define DE_PREFAC   7   /* not used  must be 0 */
#define DE_INTERLEAVE   8   /* usually 0 */
#define DE_LOWCYL   9   /* starting cylinder. typically 0 */
#define DE_UPPERCYL 10  /* max cylinder.  drive specific */
#define DE_NUMBUFFERS   11  /* starting # of buffers.  typically 5 */
#define DE_MEMBUFTYPE   12  /* type of mem to allocate for buffers. */
#define DE_BUFMEMTYPE   12  /* same as above,  better name
                 * 1 is public,  3 is chip,  5 is fast */
#define DE_MAXTRANSFER  13  /* Max number bytes to transfer at a time */
#define DE_MASK     14  /* Address Mask to block out certain memory */
#define DE_BOOTPRI  15  /* Boot priority for autoboot */
#define DE_DOSTYPE  16  /* ASCII (HEX) string showing filesystem type 
                 * 0X444F5300 is old filesystem, 
                 * 0X444F5301 is fast file system */
#define DE_BAUD     17  /* Baud rate for serial handler */
#define DE_CONTROL  18  /* Control SHORTINT for handler/filesystem */
#define DE_BOOTBLOCKS   19  /* Number of blocks containing boot code */

/* The file system startup message is linked into a device node's startup
** field.  It contains a pointer to the above environment,  plus the
** information needed to do an exec OpenDevice().
*/
STRUCT FileSysStartupMsg  
    LONGINT   fssm_Unit   /* exec unit number for this device */
    ADDRESS    fssm_Device     /* null terminated bstring to the device name */
    ADDRESS    fssm_Environ    /* ptr to environment table (see above) */
    LONGINT   fssm_Flags  /* flags for OpenDevice() */
END STRUCT 


/* The include file "libraries/dosextens.h" has a DeviceList structure.
 * The "device list" can have one of three different things linked onto
 * it.  Dosextens defines the structure for a volume.  DLT_DIRECTORY
 * is for an assigned directory.  The following structure is for
 * a dos "device" (DLT_DEVICE).
*/

STRUCT DeviceNode  
    ADDRESS    dn_Next     /* singly linked list */
    LONGINT   dn_Type     /* always 0 for dos "devices" */
    MsgPortPtr  dn_Task     /* standard dos "task" field.  If this is
                 * null when the node is accesses,  a task
                 * will be started up */
    ADDRESS    dn_Lock     /* not used for devices -- leave null */
    ADDRESS    dn_Handler  /* filename to loadseg (if seglist is null) */
    LONGINT   dn_StackSize    /* stacksize to use when starting task */
    LONGINT    dn_Priority     /* task priority when starting task */
    ADDRESS    dn_Startup  /* startup msg: FileSysStartupMsg for disks */
    ADDRESS    dn_SegList  /* code to run to start new task (if necessary).
                 * if null then dn_Handler will be loaded. */
    ADDRESS    dn_GlobalVec    /* BCPL global vector to use when starting
                 * a task.  -1 means that dn_SegList is not
                 * for a bcpl program,  so the dos won't
                 * try and construct one.  0 tell the
                 * dos that you obey BCPL linkage rules, 
                 * and that it should construct a global
                 * vector for you.
                 */
    ADDRESS    dn_Name     /* the node name,  e.g. '\3', 'D', 'F', '3' */
END STRUCT 

#endif  /* DOS_FILEHANDLER_H */