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/**********************************************************************
ISA 8 bit XT Hard Disk Controller
**********************************************************************/
#pragma once
#ifndef ISA_HDC_H
#define ISA_HDC_H
#include "emu.h"
#include "machine/isa.h"
#include "imagedev/harddriv.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> isa8_hdc_device
class isa8_hdc_device :
public device_t,
public device_isa8_card_interface
{
public:
// construction/destruction
isa8_hdc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// optional information overrides
virtual machine_config_constructor device_mconfig_additions() const;
virtual const rom_entry *device_rom_region() const;
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
private:
int drv; /* 0 master, 1 slave drive */
int cylinders[2]; /* number of cylinders */
int rwc[2]; /* reduced write current from cyl */
int wp[2]; /* write precompensation from cyl */
int heads[2]; /* heads */
int ecc[2]; /* ECC bytes */
/* indexes */
int cylinder[2]; /* current cylinder */
int head[2]; /* current head */
int sector[2]; /* current sector */
int sector_cnt[2]; /* sector count */
int control[2]; /* control */
int csb; /* command status byte */
int status; /* drive status */
int error; /* error code */
int dip; /* dip switches */
emu_timer *timer;
int data_cnt; /* data count */
UINT8 *buffer; /* data buffer */
UINT8 *buffer_ptr; /* data pointer */
UINT8 hdc_control;
UINT8 hdcdma_data[512];
UINT8 *hdcdma_src;
UINT8 *hdcdma_dst;
int hdcdma_read;
int hdcdma_write;
int hdcdma_size;
// internal state
public:
virtual UINT8 dack_r(int line);
virtual void dack_w(int line,UINT8 data);
protected:
hard_disk_file *pc_hdc_file(int id);
void pc_hdc_result(int set_error_info);
int no_dma(void);
int get_lbasector();
int pc_hdc_dack_r();
void pc_hdc_dack_w(int data);
void execute_read();
void execute_write();
void get_drive();
void get_chsn();
int test_ready();
static TIMER_CALLBACK(pc_hdc_command);
public:
void hdc_command();
void pc_hdc_data_w(int data);
void pc_hdc_reset_w(int data);
void pc_hdc_select_w(int data);
void pc_hdc_control_w(int data);
UINT8 pc_hdc_data_r();
UINT8 pc_hdc_status_r();
UINT8 pc_hdc_dipswitch_r();
};
// device type definition
extern const device_type ISA8_HDC;
#endif /* ISA_HDC_H */
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