hdd.h

// hdd.h


#ifndef __HDD_H__
#define __HDD_H__


// defines
#define CMD_IDECMD  0x04
#define CMD_IDEDAT  0x08

#define CMD_IDE_REGS_RD   0x80
#define CMD_IDE_REGS_WR   0x90
#define CMD_IDE_DATA_WR   0xA0
#define CMD_IDE_DATA_RD   0xB0
#define CMD_IDE_STATUS_WR 0xF0

#define IDE_STATUS_END  0x80
#define IDE_STATUS_IRQ  0x10
#define IDE_STATUS_RDY  0x08
#define IDE_STATUS_REQ  0x04
#define IDE_STATUS_ERR  0x01

#define ACMD_RECALIBRATE                  0x10
#define ACMD_DIAGNOSTIC                   0x90
#define ACMD_IDENTIFY_DEVICE              0xEC
#define ACMD_INITIALIZE_DEVICE_PARAMETERS 0x91
#define ACMD_READ_SECTORS                 0x20
#define ACMD_WRITE_SECTORS                0x30
#define ACMD_READ_MULTIPLE                0xC4
#define ACMD_WRITE_MULTIPLE               0xC5
#define ACMD_SET_MULTIPLE_MODE            0xC6

#define HDF_DISABLED  0
#define HDF_FILE      1
#define HDF_CARD      2
#define HDF_CARDPART0 3
#define HDF_CARDPART1 4
#define HDF_CARDPART2 5
#define HDF_CARDPART3 6
#define HDF_TYPEMASK  15
#define HDF_SYNTHRDB  128 // flag to indicate whether we should auto-synthesize a RigidDiskBlock

#define HDF_FILETYPE_UNKNOWN  0
#define HDF_FILETYPE_NOTFOUND 1
#define HDF_FILETYPE_RDB      2
#define HDF_FILETYPE_DOS      3

// types
typedef struct
{
    unsigned char enabled; // 0: Disabled, 1: Hard file, 2: MMC (entire card), 3-6: Partition 1-4 of MMC card
    unsigned char present;
    char name[8];
    char long_name[16];
} hardfileTYPE;

typedef struct
{
  int             type; // are we using a file, the entire SD card or a partition on the SD card?
  fileTYPE        file;
  unsigned short  cylinders;
  unsigned short  heads;
  unsigned short  sectors;
  unsigned short  sectors_per_block;
  unsigned short  partition; // partition no.
  long            offset; // if a partition, the lba offset of the partition.  Can be negative if we've synthesized an RDB.
  unsigned long   index[1024];
  unsigned long   index_size;
} hdfTYPE;

// variables
extern char debugmsg[40];
extern char debugmsg2[40];
extern hardfileTYPE *hardfile[2];
extern hdfTYPE hdf[2];

// functions
void IdentifyDevice(unsigned short *pBuffer, unsigned char unit);
unsigned long chs2lba(unsigned short cylinder, unsigned char head, unsigned short sector, unsigned char unit);
void WriteTaskFile(unsigned char error, unsigned char sector_count, unsigned char sector_number, unsigned char cylinder_low, unsigned char cylinder_high, unsigned char drive_head);
void WriteStatus(unsigned char status);
void HandleHDD(unsigned char c1, unsigned char c2);
void GetHardfileGeometry(hdfTYPE *hdf);
void BuildHardfileIndex(hdfTYPE *hdf);
unsigned char HardFileSeek(hdfTYPE *hdf, unsigned long lba);
unsigned char OpenHardfile(unsigned char unit);
unsigned char GetHDFFileType(char *filename);


#endif // __HDD_H__