2017-05-30 03:38:38 +02:00
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/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Implementation of the floppy drive emulation.
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*
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2018-01-17 18:43:36 +01:00
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* Version: @(#)fdd.h 1.0.4 2018/01/16
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2017-05-30 03:38:38 +02:00
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*
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2017-08-24 01:14:39 -04:00
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* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
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2017-05-30 03:38:38 +02:00
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* Miran Grca, <mgrca8@gmail.com>
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2017-11-02 02:28:00 -05:00
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*
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2018-01-17 18:43:36 +01:00
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* Copyright 2008-2018 Sarah Walker.
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* Copyright 2016-2018 Miran Grca.
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2017-05-30 03:38:38 +02:00
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*/
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2017-08-24 01:14:39 -04:00
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#ifndef EMU_FDD_H
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# define EMU_FDD_H
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2017-05-30 03:38:38 +02:00
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2018-01-17 18:43:36 +01:00
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#define FDD_NUM 4
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2016-06-26 00:34:39 +02:00
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#define SEEK_RECALIBRATE -999
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2017-08-24 01:14:39 -04:00
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2016-09-04 22:20:32 +02:00
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2017-11-02 02:28:00 -05:00
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#ifdef __cplusplus
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extern "C" {
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#endif
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2016-06-26 00:34:39 +02:00
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extern int fdd_swap;
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2017-05-05 01:49:42 +02:00
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2018-01-17 18:43:36 +01:00
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extern void fdd_do_seek(int drive, int track);
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2017-08-24 01:14:39 -04:00
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extern void fdd_forced_seek(int drive, int track_diff);
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extern void fdd_seek(int drive, int track_diff);
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extern int fdd_track0(int drive);
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extern int fdd_getrpm(int drive);
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extern void fdd_set_densel(int densel);
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extern int fdd_can_read_medium(int drive);
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extern int fdd_doublestep_40(int drive);
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extern int fdd_is_525(int drive);
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extern int fdd_is_dd(int drive);
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extern int fdd_is_ed(int drive);
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extern int fdd_is_double_sided(int drive);
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extern void fdd_set_head(int drive, int head);
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extern int fdd_get_head(int drive);
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extern void fdd_set_turbo(int drive, int turbo);
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extern int fdd_get_turbo(int drive);
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extern void fdd_set_check_bpb(int drive, int check_bpb);
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extern int fdd_get_check_bpb(int drive);
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extern void fdd_set_type(int drive, int type);
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extern int fdd_get_type(int drive);
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extern int fdd_get_flags(int drive);
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extern int fdd_get_densel(int drive);
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extern char *fdd_getname(int type);
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extern char *fdd_get_internal_name(int type);
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extern int fdd_get_from_internal_name(char *s);
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2017-05-05 01:49:42 +02:00
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2018-01-17 18:43:36 +01:00
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extern int fdd_current_track(int drive);
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typedef struct {
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void (*seek)(int drive, int track);
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void (*readsector)(int drive, int sector, int track, int side, int density, int sector_size);
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void (*writesector)(int drive, int sector, int track, int side, int density, int sector_size);
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void (*comparesector)(int drive, int sector, int track, int side, int density, int sector_size);
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void (*readaddress)(int drive, int side, int density);
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void (*format)(int drive, int side, int density, uint8_t fill);
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int (*hole)(int drive);
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double (*byteperiod)(int drive);
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void (*stop)(int drive);
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void (*poll)(int drive);
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} DRIVE;
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extern DRIVE drives[FDD_NUM];
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extern wchar_t floppyfns[FDD_NUM][512];
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extern int driveempty[FDD_NUM];
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extern int64_t fdd_poll_time[FDD_NUM];
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extern int ui_writeprot[FDD_NUM];
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extern int curdrive;
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extern int fdd_time;
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extern int64_t floppytime;
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extern void fdd_load(int drive, wchar_t *fn);
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extern void fdd_new(int drive, char *fn);
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extern void fdd_close(int drive);
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extern void fdd_init(void);
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extern void fdd_reset(void);
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extern void fdd_poll(int drive);
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extern void fdd_poll_0(void* priv);
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extern void fdd_poll_1(void* priv);
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extern void fdd_poll_2(void* priv);
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extern void fdd_poll_3(void* priv);
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extern void fdd_seek(int drive, int track);
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extern void fdd_readsector(int drive, int sector, int track,
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int side, int density, int sector_size);
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extern void fdd_writesector(int drive, int sector, int track,
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int side, int density, int sector_size);
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extern void fdd_comparesector(int drive, int sector, int track,
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int side, int density, int sector_size);
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extern void fdd_readaddress(int drive, int side, int density);
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extern void fdd_format(int drive, int side, int density, uint8_t fill);
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extern int fdd_hole(int drive);
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extern double fdd_byteperiod(int drive);
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extern void fdd_stop(int drive);
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extern int fdd_empty(int drive);
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extern void fdd_set_rate(int drive, int drvden, int rate);
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extern int motorspin;
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extern int64_t motoron[FDD_NUM];
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extern int swwp;
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extern int disable_write;
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extern int defaultwriteprot;
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extern int writeprot[FDD_NUM], fwriteprot[FDD_NUM];
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extern int fdd_cur_track[FDD_NUM];
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extern int fdd_changed[FDD_NUM];
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extern int drive_empty[FDD_NUM];
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extern int drive_type[FDD_NUM];
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/*Used in the Read A Track command. Only valid for fdd_readsector(). */
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#define SECTOR_FIRST -2
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#define SECTOR_NEXT -1
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#if 0
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/* 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. */
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#define BYTE_GAP0 0x00
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#define BYTE_GAP1 0x10
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#define BYTE_GAP4 0x20
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#define BYTE_GAP2 0x40
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#define BYTE_GAP3 0x50
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#define BYTE_I_SYNC 0x01
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#define BYTE_ID_SYNC 0x41
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#define BYTE_DATA_SYNC 0x51
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#define BYTE_IAM_SYNC 0x02
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#define BYTE_IDAM_SYNC 0x42
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#define BYTE_DATAAM_SYNC 0x52
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#define BYTE_IAM 0x03
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#define BYTE_IDAM 0x43
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#define BYTE_DATAAM 0x53
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#define BYTE_ID 0x44
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#define BYTE_DATA 0x54
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#define BYTE_ID_CRC 0x45
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#define BYTE_DATA_CRC 0x55
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#define BYTE_IS_FUZZY 0x80
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#define BYTE_INDEX_HOLE 0x80 /* 1 = index hole, 0 = regular byte */
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#define BYTE_IS_SECTOR 0x40 /* 1 = per-sector, 0 = per-track */
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#define BYTE_IS_POST_TRACK 0x20 /* 1 = after all sectors, 0 = before or during all sectors */
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#define BYTE_IS_DATA 0x10 /* 1 = data, 0 = id */
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#define BYTE_TYPE 0x0F /* 5 = crc, 4 = data, 3 = address mark, 2 = address mark sync, 1 = sync, 0 = gap */
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#define BYTE_TYPE_GAP 0x00
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#define BYTE_TYPE_SYNC 0x01
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#define BYTE_TYPE_AM_SYNC 0x02
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#define BYTE_TYPE_AM 0x03
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#define BYTE_TYPE_DATA 0x04
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#define BYTE_TYPE_CRC 0x05
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#endif
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typedef union {
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uint16_t word;
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uint8_t bytes[2];
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} crc_t;
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void fdd_calccrc(uint8_t byte, crc_t *crc_var);
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typedef struct
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{
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uint16_t (*disk_flags)(int drive);
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uint16_t (*side_flags)(int drive);
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void (*writeback)(int drive);
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void (*set_sector)(int drive, int side, uint8_t c, uint8_t h, uint8_t r, uint8_t n);
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uint8_t (*read_data)(int drive, int side, uint16_t pos);
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void (*write_data)(int drive, int side, uint16_t pos, uint8_t data);
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int (*format_conditions)(int drive);
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int32_t (*extra_bit_cells)(int drive, int side);
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uint16_t* (*encoded_data)(int drive, int side);
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void (*read_revolution)(int drive);
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uint32_t (*index_hole_pos)(int drive, int side);
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uint32_t (*get_raw_size)(int drive, int side);
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uint8_t check_crc;
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} d86f_handler_t;
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d86f_handler_t d86f_handler[FDD_NUM];
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void d86f_common_handlers(int drive);
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int d86f_is_40_track(int drive);
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void d86f_reset_index_hole_pos(int drive, int side);
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uint16_t d86f_prepare_pretrack(int drive, int side, int iso);
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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);
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extern int gap3_sizes[5][8][48];
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void null_writeback(int drive);
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void null_write_data(int drive, int side, uint16_t pos, uint8_t data);
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int null_format_conditions(int drive);
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void d86f_unregister(int drive);
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extern uint8_t dmf_r[21];
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extern uint8_t xdf_physical_sectors[2][2];
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extern uint8_t xdf_gap3_sizes[2][2];
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extern uint16_t xdf_trackx_spos[2][8];
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typedef struct
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{
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uint8_t h;
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uint8_t r;
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} xdf_id_t;
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typedef union
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{
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uint16_t word;
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xdf_id_t id;
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} xdf_sector_t;
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extern xdf_sector_t xdf_img_layout[2][2][46];
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extern xdf_sector_t xdf_disk_layout[2][2][38];
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uint32_t td0_get_raw_tsize(int side_flags, int slower_rpm);
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void d86f_set_track_pos(int drive, uint32_t track_pos);
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int32_t null_extra_bit_cells(int drive, int side);
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uint16_t* common_encoded_data(int drive, int side);
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void common_read_revolution(int drive);
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void null_set_sector(int drive, int side, uint8_t c, uint8_t h, uint8_t r, uint8_t n);
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uint32_t null_index_hole_pos(int drive, int side);
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uint32_t common_get_raw_size(int drive, int side);
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typedef struct
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{
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uint8_t c;
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uint8_t h;
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uint8_t r;
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uint8_t n;
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} sector_id_fields_t;
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typedef union
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{
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uint32_t dword;
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uint8_t byte_array[4];
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sector_id_fields_t id;
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} sector_id_t;
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void d86f_set_version(int drive, uint16_t version);
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void d86f_initialize_last_sector_id(int drive, int c, int h, int r, int n);
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void d86f_zero_bit_field(int drive, int side);
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void d86f_set_fdc(void *fdc);
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void fdi_set_fdc(void *fdc);
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void fdd_set_fdc(void *fdc);
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void imd_set_fdc(void *fdc);
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void img_set_fdc(void *fdc);
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extern void d86f_set_cur_track(int drive, int track);
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extern void d86f_zero_track(int drive);
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2017-05-05 04:32:05 +02:00
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2017-11-02 02:28:00 -05:00
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#ifdef __cplusplus
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}
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#endif
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2017-07-26 00:16:54 +02:00
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2017-08-24 01:14:39 -04:00
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#endif /*EMU_FDD_H*/
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