/*
* 86Box A hypervisor and IBM PC system emulator that specializes in
* running old operating systems and software designed for IBM
* PC systems and compatibles from 1981 through fairly recent
* system designs based on the PCI bus.
*
* This file is part of the 86Box distribution.
*
* Generic floppy disk interface that communicates with the
* other handlers.
*
* Version: @(#)disc.h 1.0.1 2017/06/03
*
* Authors: Sarah Walker,
* Miran Grca,
* Copyright 2008-2017 Sarah Walker.
* Copyright 2016-2017 Miran Grca.
*/
#ifndef EMU_DISC_H
# define EMU_DISC_H
#define FDD_NUM 4
typedef struct
{
void (*seek)(int drive, int track);
void (*readsector)(int drive, int sector, int track, int side, int density, int sector_size);
void (*writesector)(int drive, int sector, int track, int side, int density, int sector_size);
void (*comparesector)(int drive, int sector, int track, int side, int density, int sector_size);
void (*readaddress)(int drive, int side, int density);
void (*format)(int drive, int side, int density, uint8_t fill);
int (*hole)(int drive);
double (*byteperiod)(int drive);
void (*stop)(int drive);
void (*poll)(int drive);
} DRIVE;
extern DRIVE drives[FDD_NUM];
extern int curdrive;
extern int disc_time;
extern int disc_poll_time[FDD_NUM];
extern void disc_load(int drive, wchar_t *fn);
extern void disc_new(int drive, char *fn);
extern void disc_close(int drive);
extern void disc_init(void);
extern void disc_reset(void);
extern void disc_poll(int drive);
extern void disc_poll_0(void* priv);
extern void disc_poll_1(void* priv);
extern void disc_poll_2(void* priv);
extern void disc_poll_3(void* priv);
extern void disc_seek(int drive, int track);
extern void disc_readsector(int drive, int sector, int track,
int side, int density, int sector_size);
extern void disc_writesector(int drive, int sector, int track,
int side, int density, int sector_size);
extern void disc_comparesector(int drive, int sector, int track,
int side, int density, int sector_size);
extern void disc_readaddress(int drive, int side, int density);
extern void disc_format(int drive, int side, int density, uint8_t fill);
extern int disc_hole(int drive);
extern double disc_byteperiod(int drive);
extern void disc_stop(int drive);
extern int disc_empty(int drive);
extern void disc_set_rate(int drive, int drvden, int rate);
extern void fdc_callback(void *priv);
extern int fdc_data(uint8_t dat);
extern void fdc_spindown(void);
extern void fdc_finishread(void);
extern void fdc_datacrcerror(void);
extern void fdc_headercrcerror(void);
extern void fdc_writeprotect(void);
extern int fdc_getdata(int last);
extern void fdc_sectorid(uint8_t track, uint8_t side, uint8_t sector,
uint8_t size, uint8_t crc1, uint8_t crc2);
extern void fdc_indexpulse(void);
/*extern int fdc_time;
extern int fdc_ready;
extern int fdc_indexcount;*/
extern int motorspin;
extern int motoron[FDD_NUM];
extern int swwp;
extern int disable_write;
extern int defaultwriteprot;
extern int writeprot[FDD_NUM], fwriteprot[FDD_NUM];
extern int disc_track[FDD_NUM];
extern int disc_changed[FDD_NUM];
extern int drive_empty[FDD_NUM];
extern int drive_type[FDD_NUM];
/*Used in the Read A Track command. Only valid for disc_readsector(). */
#define SECTOR_FIRST -2
#define SECTOR_NEXT -1
#if 0
/* Bits 0-3 define byte type, bit 5 defines whether it is a per-track (0) or per-sector (1) byte, if bit 7 is set, the byte is the index hole. */
#define BYTE_GAP0 0x00
#define BYTE_GAP1 0x10
#define BYTE_GAP4 0x20
#define BYTE_GAP2 0x40
#define BYTE_GAP3 0x50
#define BYTE_I_SYNC 0x01
#define BYTE_ID_SYNC 0x41
#define BYTE_DATA_SYNC 0x51
#define BYTE_IAM_SYNC 0x02
#define BYTE_IDAM_SYNC 0x42
#define BYTE_DATAAM_SYNC 0x52
#define BYTE_IAM 0x03
#define BYTE_IDAM 0x43
#define BYTE_DATAAM 0x53
#define BYTE_ID 0x44
#define BYTE_DATA 0x54
#define BYTE_ID_CRC 0x45
#define BYTE_DATA_CRC 0x55
#define BYTE_IS_FUZZY 0x80
#define BYTE_INDEX_HOLE 0x80 /* 1 = index hole, 0 = regular byte */
#define BYTE_IS_SECTOR 0x40 /* 1 = per-sector, 0 = per-track */
#define BYTE_IS_POST_TRACK 0x20 /* 1 = after all sectors, 0 = before or during all sectors */
#define BYTE_IS_DATA 0x10 /* 1 = data, 0 = id */
#define BYTE_TYPE 0x0F /* 5 = crc, 4 = data, 3 = address mark, 2 = address mark sync, 1 = sync, 0 = gap */
#define BYTE_TYPE_GAP 0x00
#define BYTE_TYPE_SYNC 0x01
#define BYTE_TYPE_AM_SYNC 0x02
#define BYTE_TYPE_AM 0x03
#define BYTE_TYPE_DATA 0x04
#define BYTE_TYPE_CRC 0x05
#endif
typedef union {
uint16_t word;
uint8_t bytes[2];
} crc_t;
void disc_calccrc(uint8_t byte, crc_t *crc_var);
typedef struct
{
uint16_t (*disk_flags)(int drive);
uint16_t (*side_flags)(int drive);
void (*writeback)(int drive);
void (*set_sector)(int drive, int side, uint8_t c, uint8_t h, uint8_t r, uint8_t n);
uint8_t (*read_data)(int drive, int side, uint16_t pos);
void (*write_data)(int drive, int side, uint16_t pos, uint8_t data);
int (*format_conditions)(int drive);
int32_t (*extra_bit_cells)(int drive, int side);
uint16_t* (*encoded_data)(int drive, int side);
void (*read_revolution)(int drive);
uint32_t (*index_hole_pos)(int drive, int side);
uint32_t (*get_raw_size)(int drive, int side);
uint8_t check_crc;
} d86f_handler_t;
d86f_handler_t d86f_handler[FDD_NUM];
void d86f_common_handlers(int drive);
int d86f_is_40_track(int drive);
void d86f_reset_index_hole_pos(int drive, int side);
uint16_t d86f_prepare_pretrack(int drive, int side, int iso);
uint16_t d86f_prepare_sector(int drive, int side, int prev_pos, uint8_t *id_buf, uint8_t *data_buf, int data_len, int gap2, int gap3, int deleted, int bad_crc);
int gap3_sizes[5][8][48];
void null_writeback(int drive);
void null_write_data(int drive, int side, uint16_t pos, uint8_t data);
int null_format_conditions(int drive);
void d86f_unregister(int drive);
uint8_t dmf_r[21];
uint8_t xdf_physical_sectors[2][2];
uint8_t xdf_gap3_sizes[2][2];
uint16_t xdf_trackx_spos[2][8];
typedef struct
{
uint8_t h;
uint8_t r;
} xdf_id_t;
typedef union
{
uint16_t word;
xdf_id_t id;
} xdf_sector_t;
xdf_sector_t xdf_img_layout[2][2][46];
xdf_sector_t xdf_disk_layout[2][2][38];
uint32_t td0_get_raw_tsize(int side_flags, int slower_rpm);
void d86f_set_track_pos(int drive, uint32_t track_pos);
int32_t null_extra_bit_cells(int drive, int side);
uint16_t* common_encoded_data(int drive, int side);
void common_read_revolution(int drive);
void null_set_sector(int drive, int side, uint8_t c, uint8_t h, uint8_t r, uint8_t n);
uint32_t null_index_hole_pos(int drive, int side);
uint32_t common_get_raw_size(int drive, int side);
typedef struct
{
uint8_t c;
uint8_t h;
uint8_t r;
uint8_t n;
} sector_id_fields_t;
typedef union
{
uint32_t dword;
uint8_t byte_array[4];
sector_id_fields_t id;
} sector_id_t;
void d86f_set_version(int drive, uint16_t version);
void d86f_initialize_last_sector_id(int drive, int c, int h, int r, int n);
void d86f_zero_bit_field(int drive, int side);
#endif /*EMU_DISC_H*/