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floppy.h File Reference

Floppy disk driver header. More...

Go to the source code of this file.

Data Structures
struct	floppy_struct
	Floppy geometry structures. More...
Defines
#define	FDC_SECTORS   18
	Sectors per track.
#define	FDC_HEADS   2
	Heads per track.
#define	FDC_TRACKS   80
	Tracks per disk.
#define	FDC_SECTOR_SIZE   512
	Bytes per sector.
#define	FDC_TIME_MOTOR_SPINUP   500
	FDC motor spin-up time (msec).
#define	FDC_TIME_MOTOR_OFF   3000
	FDC timeout to turn the motor off (msec).
#define	FDC_DOR   0x3F2
	Digital Output Register.
#define	FDC_MSR   0x3F4
	Main Status Register (read).
#define	FDC_DSR   0x3F4
	Data Rate Select Register (write).
#define	FDC_DATA   0x3F5
	Data Register.
#define	FDC_DIR   0x3F7
	Digital Input Register.
#define	FDC_CCR   0x3F7
	Configuration Control Register.
#define	CMD_SPECIFY   0x03
	Specify.
#define	CMD_WRITE   0xC5
	Write.
#define	CMD_READ   0xE6
	Read.
#define	CMD_RECAL   0x07
	Recalibrate.
#define	CMD_SENSEI   0x08
	Send a "sense interrupt status".
#define	CMD_FORMAT   0x4D
	Format a track.
#define	CMD_SEEK   0x0F
	Seek a track.
#define	CMD_VERSION   0x10
	Get the controller version.
#define	MSR_BUSY   0x10
	The controller is busy.
Typedefs
typedef floppy_struct	floppy_struct
	Floppy geometry structures.
Functions
void	floppy_handler ()
	This is the floppy interrupt handler routine. It is invoked every time that a floppy operation successfully completes.
void	floppy_thread ()
	This is a routine called from clock_thread() at every clock tick to perform the floppy motor kill countdown and to control the floppy timeouts.
bool	init_floppy ()
	Initialize the floppy driver. Returns: TRUE on success; FALSE if an error occurs.
void	fdc_motor_on ()
	Turn the floppy motor on.
void	fdc_motor_off ()
	Starts the FDC motor kill countdown.
void	fdc_recalibrate ()
	Recalibrate the floppy drive.
bool	fdc_seek (int track)
	Seek a track. Parameters: track  The track to seek. Returns: TRUE on success; FALSE if an error occurs.
bool	fdc_read (int block, byte *buffer, uint32_t count)
	Read some contiguous blocks from the floppy disk. Parameters: block  The starting block to read. buffer  The destination buffer in memory where the blocks will be copied. count  How many blocks to read. Returns: TRUE on success; FALSE if an error occurs.
bool	fdc_write (int block, byte *buffer, uint32_t count)
	Write some contiguous blocks to the floppy disk. Parameters: block  The starting block to write. buffer  The address in memory from which the data will be copied. count  How many blocks to write. Returns: TRUE on success; FALSE if an error occurs.
bool	fdc_is_changed ()
	Check if the floppy disk was changed. Returns: TRUE if the disk was changed; FALSE otherwise.

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Detailed Description

Floppy disk driver header.

Author:

Andrea Righi <drizzt@inwind.it>

Date:

Last update: 2003-11-08

Note:

Copyright (©) 2003 Andrea Righi

Definition in file floppy.h.

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Define Documentation

#define CMD_FORMAT   0x4D

Format a track. Definition at line 40 of file floppy.h.

#define CMD_READ   0xE6

Read. Definition at line 37 of file floppy.h.

#define CMD_RECAL   0x07

Recalibrate. Definition at line 38 of file floppy.h.

#define CMD_SEEK   0x0F

Seek a track. Definition at line 41 of file floppy.h.

#define CMD_SENSEI   0x08

Send a "sense interrupt status". Definition at line 39 of file floppy.h.

#define CMD_SPECIFY   0x03

Specify. Definition at line 35 of file floppy.h.

#define CMD_VERSION   0x10

Get the controller version. Definition at line 42 of file floppy.h.

#define CMD_WRITE   0xC5

Write. Definition at line 36 of file floppy.h.

#define FDC_CCR   0x3F7

Configuration Control Register. Definition at line 31 of file floppy.h.

#define FDC_DATA   0x3F5

Data Register. Definition at line 29 of file floppy.h.

#define FDC_DIR   0x3F7

Digital Input Register. Definition at line 30 of file floppy.h.

#define FDC_DOR   0x3F2

Digital Output Register. Definition at line 26 of file floppy.h.

#define FDC_DSR   0x3F4

Data Rate Select Register (write). Definition at line 28 of file floppy.h.

#define FDC_HEADS   2

Heads per track. Definition at line 14 of file floppy.h.

#define FDC_MSR   0x3F4

Main Status Register (read). Definition at line 27 of file floppy.h.

#define FDC_SECTOR_SIZE   512

Bytes per sector. Definition at line 16 of file floppy.h.

#define FDC_SECTORS   18

Sectors per track. Definition at line 13 of file floppy.h.

#define FDC_TIME_MOTOR_OFF   3000

FDC timeout to turn the motor off (msec). Definition at line 22 of file floppy.h.

#define FDC_TIME_MOTOR_SPINUP   500

FDC motor spin-up time (msec). Definition at line 19 of file floppy.h.

#define FDC_TRACKS   80

Tracks per disk. Definition at line 15 of file floppy.h.

#define MSR_BUSY   0x10

The controller is busy. Definition at line 47 of file floppy.h.

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Typedef Documentation

typedef struct floppy_struct floppy_struct

Floppy geometry structures.

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