208 lines
5.5 KiB
C
208 lines
5.5 KiB
C
/*
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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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* Definitions for the floppy drive emulation.
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*
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*
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*
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* Authors: Sarah Walker, <tommowalker@tommowalker.co.uk>
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* Miran Grca, <mgrca8@gmail.com>
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* Fred N. van Kempen, <decwiz@yahoo.com>
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*
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* Copyright 2008-2018 Sarah Walker.
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* Copyright 2016-2018 Miran Grca.
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* Copyright 2018 Fred N. van Kempen.
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*/
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#ifndef EMU_FDD_H
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# define EMU_FDD_H
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#define FDD_NUM 4
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#define SEEK_RECALIBRATE -999
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern int fdd_swap;
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extern void fdd_set_motor_enable(int drive, int motor_enable);
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extern void fdd_do_seek(int drive, int track);
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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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extern int fdd_current_track(int drive);
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typedef struct {
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int id;
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void (*seek)(int drive, int track);
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void (*readsector)(int drive, int sector, int track, int side,
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int density, int sector_size);
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void (*writesector)(int drive, int sector, int track, int side,
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int density, int sector_size);
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void (*comparesector)(int drive, int sector, int track, int side,
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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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uint64_t (*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 char floppyfns[FDD_NUM][512];
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extern pc_timer_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, char *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_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 void fdd_stop(int drive);
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extern void fdd_do_writeback(int drive);
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extern int motorspin;
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extern uint64_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_changed[FDD_NUM];
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extern int drive_empty[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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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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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,
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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,
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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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extern const int gap3_sizes[5][8][48];
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extern const uint8_t dmf_r[21];
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extern const uint8_t xdf_physical_sectors[2][2];
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extern const uint8_t xdf_gap3_sizes[2][2];
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extern const uint16_t xdf_trackx_spos[2][8];
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typedef struct {
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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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uint16_t word;
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xdf_id_t id;
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} xdf_sector_t;
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extern const xdf_sector_t xdf_img_layout[2][2][46];
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extern const xdf_sector_t xdf_disk_layout[2][2][38];
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typedef struct {
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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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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_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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void mfm_set_fdc(void *fdc);
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#ifdef __cplusplus
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}
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#endif
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#endif /*EMU_FDD_H*/
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