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Floppy fixes to handle TD0 and IMD images with some kinds of copy protection, fixes eg. F-19 Stealth Fighter from 1988.

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OBattler
2019-12-05 21:36:28 +01:00
parent b6adaff6fd
commit b9a35eb418
20 changed files with 471 additions and 648 deletions
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117
src/floppy/fdd_86f.h
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@@ -1,44 +1,56 @@
/*
* VARCem Virtual ARchaeological Computer EMulator.
* An emulator of (mostly) x86-based PC systems and devices,
* using the ISA,EISA,VLB,MCA and PCI system buses, roughly
* spanning the era between 1981 and 1995.
* 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 VARCem Project.
* This file is part of the 86Box distribution.
*
* Definitions for the 86F floppy image format.
*
* Version: @(#)floppy_86f.h 1.0.5 2018/11/14
* Version: @(#)floppy_86f.h 1.0.6 2019/12/05
*
* Authors: Fred N. van Kempen, <decwiz@yahoo.com>
* Miran Grca, <mgrca8@gmail.com>
* Authors: Miran Grca, <mgrca8@gmail.com>
* Fred N. van Kempen, <decwiz@yahoo.com>
*
* Copyright 2018 Fred N. van Kempen.
* Copyright 2016-2018 Miran Grca.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the:
*
* Free Software Foundation, Inc.
* 59 Temple Place - Suite 330
* Boston, MA 02111-1307
* USA.
* Copyright 2016-2019 Miran Grca.
* Copyright 2018,2019 Fred N. van Kempen.
*/
#ifndef EMU_FLOPPY_86F_H
# define EMU_FLOPPY_86F_H
#define D86FVER 0x020C
#define D86FVER 0x020C
/* Thesere were borrowed from TeleDisk. */
#define SECTOR_DUPLICATED 0x01
#define SECTOR_CRC_ERROR 0x02
#define SECTOR_DELETED_DATA 0x04
#define SECTOR_DATA_SKIPPED 0x10
#define SECTOR_NO_DATA 0x20
#define SECTOR_NO_ID 0x40
#define length_gap0 80
#define length_gap1 50
#define length_sync 12
#define length_am 4
#define length_crc 2
#define IBM
#define MFM
#ifdef IBM
#define pre_gap1 length_gap0 + length_sync + length_am
#else
#define pre_gap1 0
#endif
#define pre_track pre_gap1 + length_gap1
#define pre_gap length_sync + length_am + 4 + length_crc
#define pre_data length_sync + length_am
#define post_gap length_crc
extern d86f_handler_t d86f_handler[FDD_NUM];
extern void d86f_init(void);
@@ -61,29 +73,38 @@ extern void d86f_prepare_track_layout(int drive, int side);
extern void d86f_set_version(int drive, uint16_t version);
extern uint16_t d86f_side_flags(int drive);
extern uint16_t d86f_track_flags(int drive);
extern void d86f_initialize_last_sector_id(int drive, int c, int h,
int r, int n);
extern void d86f_initialize_last_sector_id(int drive, int c, int h, int r, int n);
extern void d86f_initialize_linked_lists(int drive);
extern void d86f_destroy_linked_lists(int drive, int side);
#define length_gap0 80
#define length_gap1 50
#define length_sync 12
#define length_am 4
#define length_crc 2
extern 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 flags);
extern void d86f_setup(int drive);
extern void d86f_destroy(int drive);
extern int d86f_export(int drive, wchar_t *fn);
extern void d86f_unregister(int drive);
extern void d86f_common_handlers(int drive);
extern void d86f_set_version(int drive, uint16_t version);
extern int d86f_is_40_track(int drive);
extern void d86f_reset_index_hole_pos(int drive, int side);
extern uint16_t d86f_prepare_pretrack(int drive, int side, int iso);
extern void d86f_set_track_pos(int drive, uint32_t track_pos);
extern void d86f_set_cur_track(int drive, int track);
extern void d86f_zero_track(int drive);
extern void d86f_initialize_last_sector_id(int drive, int c, int h, int r, int n);
extern void d86f_initialize_linked_lists(int drive);
extern void d86f_destroy_linked_lists(int drive, int side);
#define IBM
#define MFM
#ifdef IBM
#define pre_gap1 length_gap0 + length_sync + length_am
#else
#define pre_gap1 0
#endif
#define pre_track pre_gap1 + length_gap1
#define pre_gap length_sync + length_am + 4 + length_crc
#define pre_data length_sync + length_am
#define post_gap length_crc
extern uint16_t *common_encoded_data(int drive, int side);
extern void common_read_revolution(int drive);
extern uint32_t common_get_raw_size(int drive, int side);
extern void null_writeback(int drive);
extern void null_write_data(int drive, int side, uint16_t pos, uint8_t data);
extern int null_format_conditions(int drive);
extern int32_t null_extra_bit_cells(int drive, int side);
extern void null_set_sector(int drive, int side, uint8_t c, uint8_t h, uint8_t r, uint8_t n);
extern uint32_t null_index_hole_pos(int drive, int side);
#endif /*EMU_FLOPPY_86F_H*/