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/****************************************************************************
Hard disk support
See ti99_hd.c for documentation
Michael Zapf
February 2012: Rewritten as class
*****************************************************************************/
#ifndef __TI99_HD__
#define __TI99_HD__
#include "emu.h"
#include "imagedev/harddriv.h"
#define MFMHD_0 "mfmhd0"
#define MFMHD_1 "mfmhd1"
#define MFMHD_2 "mfmhd2"
extern const device_type TI99_MFMHD;
/*
Needed to adapt to higher cylinder numbers. Floppies do not have such
high numbers.
*/
struct chrn_id_hd
{
UINT16 C;
UINT8 H;
UINT8 R;
UINT8 N;
int data_id; // id for read/write data command
unsigned long flags;
};
class mfm_harddisk_device : public device_t
{
public:
mfm_harddisk_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
void read_sector(int cylinder, int head, int sector, UINT8 *buf);
void write_sector(int cylinder, int head, int sector, UINT8 *buf);
void read_track(int head, UINT8 *buffer);
void write_track(int head, UINT8 *buffer, int data_count);
UINT8 get_status();
void seek(int direction);
void get_next_id(int head, chrn_id_hd *id);
int get_track_length();
protected:
void device_start();
void device_reset();
machine_config_constructor device_mconfig_additions() const;
private:
int find_block(const UINT8 *buffer, int start, int stop, UINT8 byte, size_t number);
UINT8 cylinder_to_ident(int cylinder);
bool harddisk_chs_to_lba(hard_disk_file *hdfile, int cylinder, int head, int sector, UINT32 *lba);
int m_current_cylinder;
int m_current_head;
bool m_seeking;
int m_status;
int m_id_index; /* position in track for seeking the sector; counts the sector number */
harddisk_image_device *m_drive;
};
class ide_harddisk_device : public device_t
{
public:
ide_harddisk_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
protected:
void device_start() { };
void device_reset() { };
machine_config_constructor device_mconfig_additions() const;
};
#define MCFG_MFMHD_3_DRIVES_ADD() \
MCFG_DEVICE_ADD(MFMHD_0, TI99_MFMHD, 0) \
MCFG_DEVICE_ADD(MFMHD_1, TI99_MFMHD, 0) \
MCFG_DEVICE_ADD(MFMHD_2, TI99_MFMHD, 0)
#endif
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