hdd_internal.h

#ifndef HDD_INTERNAL_H
#define HDD_INTERNAL_H

// Structure definitions for RDB emulation.
// For hardfiles that have no RDB information, we'll just create a single-partition RDB and Part block
// on blocks 0 and 1.  All other blocks within the first cylinder will be translated into the hardfile

struct RigidDiskBlock {
    unsigned long   rdb_ID __attribute__ ((aligned(4)));	// "RDSK"
    unsigned long   rdb_Summedlongs; // 0x40
    long			rdb_ChkSum;	// Sum to zero
    unsigned long   rdb_HostID;	// 0x07
    unsigned long   rdb_BlockBytes; // 0x200
    unsigned long   rdb_Flags;	// 0x12 (Disk ID valid, no LUNs after this one)
    unsigned long   rdb_BadBlockList;	// -1 since we don't provide one
    unsigned long   rdb_PartitionList;	// 1
    unsigned long   rdb_FileSysHeaderList;	// -1
    unsigned long   rdb_DriveInit;	// -1
    unsigned long   rdb_Reserved1[6];	// 0xffffffff
    unsigned long   rdb_Cylinders;
    unsigned long   rdb_Sectors;
    unsigned long   rdb_Heads;
    unsigned long   rdb_Interleave;	// 1
    unsigned long   rdb_Park;	// =Cylinder count
    unsigned long   rdb_Reserved2[3];
    unsigned long   rdb_WritePreComp;	// High cylinder ?
    unsigned long   rdb_ReducedWrite;	// High cylinder ?
    unsigned long   rdb_StepRate;	// 3 ?
    unsigned long   rdb_Reserved3[5];
    unsigned long   rdb_RDBBlocksLo;	// block zero
    unsigned long   rdb_RDBBlocksHi;	// block one
    unsigned long   rdb_LoCylinder;	// 1
    unsigned long   rdb_HiCylinder;	// From the hardfile: cylinder count -1
    unsigned long   rdb_CylBlocks;	// From the hardfile: heads * sectors
    unsigned long   rdb_AutoParkSeconds; // zero
    unsigned long   rdb_HighRDSKBlock;	// 1
    unsigned long   rdb_Reserved4;
    char    rdb_DiskVendor[8];	        // "Don't"
    char    rdb_DiskProduct[16];	// " repartition!"
    char    rdb_DiskRevision[4];
    char    rdb_ControllerVendor[8];
    char    rdb_ControllerProduct[16];
    char    rdb_ControllerRevision[4];
    unsigned long   rdb_Reserved5[10];
} __attribute__ ((packed));

struct DosEnvec {
    unsigned long de_TableSize;	     // Size of Environment vector - 0x10
    unsigned long de_SizeBlock;	     // in longwords - 0x80
    unsigned long de_SecOrg;	     // 0
    unsigned long de_Surfaces;		 // Heads?
    unsigned long de_SectorPerBlock; // 1
    unsigned long de_BlocksPerTrack;
    unsigned long de_Reserved;	     // 2 ?
    unsigned long de_PreAlloc;	     // 0
    unsigned long de_Interleave;     // 0
    unsigned long de_LowCyl;
    unsigned long de_HighCyl;
    unsigned long de_NumBuffers;     // 30
    unsigned long de_BufMemType;     // 0 - any available
    unsigned long de_MaxTransfer;    // 0x00ffffff
    unsigned long de_Mask;	// 0x7ffffffe
    long	de_BootPri;	     // 0
    unsigned long de_DosType;	// 0x444f5301 or 3
	// Extra fields
    unsigned long de_Baud;
    unsigned long de_Control;
    unsigned long de_BootBlocks;
} __attribute__ ((packed));


struct PartitionBlock {
    unsigned long   pb_ID __attribute__ ((aligned(4)));		// "PART"
    unsigned long   pb_Summedlongs;	// 0x40
    long    pb_ChkSum;		// Sum to zero
    unsigned long   pb_HostID;		// 0x07
    unsigned long   pb_Next;		// -1
    unsigned long   pb_Flags;		// 1 - Bootable
    unsigned long   pb_Reserved1[2];	// 0
    unsigned long   pb_DevFlags;	 // 0
    char   pb_DriveName[32];	// 0x03"DH0"
    unsigned long   pb_Reserved2[15];
    struct DosEnvec pb_Environment;
    unsigned long   pb_EReserved[12];	/* reserved for future environment vector */
} __attribute__ ((packed));

#endif /* HDD_INTERNAL_H */