floppy_utils.h

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#ifndef _FLOPPY_UTILS_H_
#define _FLOPPY_UTILS_H_

#define FLOPPY_BASE     0x03f0

enum floppy_registers
{
        FLOPPY_SRA = 0, // Status register A            -- read-only
        FLOPPY_SRB = 1, // Status register B            -- read-only
        FLOPPY_DOR = 2, // Digital output register
        FLOPPY_TDR = 3, // Tape drive register
        FLOPPY_MSR = 4, // Main status register         -- read-only
        FLOPPY_DSR = 4, // Datarate select register     -- write-only
        FLOPPY_FIFO = 5, // Data FIFO
        FLOPPY_DIR = 7, // Digital input register       -- read-only
        FLOPPY_CCR = 7  // Configuration control register -- write-only
};

enum floppy_commands
{
        READ_TRACK =                    2,
        SPECIFY =                               3,
        SENSE_DRIVE_STATUS =    4,
        WRITE_DATA =                    5,
        READ_DATA =                             6,
        RECALIBRATE =                   7,
        SENSE_INTERRUPT =               8,
        READ_ID =                               10,
        READ_DELETED_DATA =             12,
        FORMAT_TRACK =                  13,
        SEEK =                                  15,
        VERSION =                               16,
        SCAN_EQUAL =                    17,
        PERPENDICULAR_MODE =    18,
        CONFIGURE =                             19,
        LOCK =                                  20,
        VERIFY =                                22,
        SCAN_LOW_OR_EQUAL =             25,
        SCAN_HIGH_OR_EQUAL =    29
};

bool floppy_ready();

int floppy_write_command(char cmd);

uint8_t floppy_read_data();

int floppy_seek(int drive, int cylindre, int head);

/*      
 * MISC  
 */

uint8_t floppy_get_type(int drive);

void floppy_detect_drives();

uint8_t floppy_get_version();

#endif