99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/*
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* Apple // emulator for *ix
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*
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* This software package is subject to the GNU General Public License
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* version 3 or later (your choice) as published by the Free Software
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* Foundation.
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*
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* Copyright 1994 Alexander Jean-Claude Bottema
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* Copyright 1995 Stephen Lee
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* Copyright 1997, 1998 Aaron Culliney
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* Copyright 1998, 1999, 2000 Michael Deutschmann
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* Copyright 2013-2015 Aaron Culliney
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*
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*/
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#ifndef A2_DISK_H
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#define A2_DISK_H
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#include "common.h"
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#define ERR_IMAGE_NOT_EXPECTED_SIZE "disk image is not expected size"
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#define ERR_STAT_FAILED "disk image unreadable for stat"
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#define ERR_CANNOT_OPEN "could not open disk image"
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#define ERR_MMAP_FAILED "disk image unreadable for mmap"
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#define NUM_TRACKS 35
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#define NUM_SECTORS 16
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#define DSK_TRACK_SIZE 0x1000 // DOS order, ProDOS order
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#define NIB_TRACK_SIZE 0x1A00 // NIB format
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#define NI2_TRACK_SIZE 0x18F0 // NI2 format
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#define DSK_SIZE (NUM_TRACKS * DSK_TRACK_SIZE) // 143360
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#define NIB_SIZE (NUM_TRACKS * NIB_TRACK_SIZE) // 232960
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#define NI2_SIZE (NUM_TRACKS * NI2_TRACK_SIZE) // 223440
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#define PHASE_BYTES (NIB_TRACK_SIZE/2)
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#define NIB_SEC_SIZE (NIB_TRACK_SIZE/NUM_SECTORS)
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#define DSK_VOLUME 254
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#define DISK_EXT_DSK ".dsk"
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#define _DSKLEN (sizeof(DISK_EXT_DSK)-1)
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#define DISK_EXT_DO ".do"
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#define _DOLEN (sizeof(DISK_EXT_DO)-1)
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#define DISK_EXT_PO ".po"
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#define _POLEN (sizeof(DISK_EXT_PO)-1)
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#define DISK_EXT_NIB ".nib"
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#define _NIBLEN (sizeof(DISK_EXT_NIB)-1)
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#define DISK_EXT_GZ ".gz"
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#define _GZLEN (sizeof(DISK_EXT_GZ)-1)
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typedef struct diskette_t {
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char *file_name;
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int fd;
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uint8_t *mmap_image;
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size_t whole_len;
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uint8_t *whole_image;
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bool nibblized;
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bool is_protected;
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bool track_valid;
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bool track_dirty;
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int *skew_table;
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long track_width;
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int phase;
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int run_byte;
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} diskette_t;
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typedef struct drive_t {
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struct timespec motor_time;
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int motor_off;
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int drive;
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int ddrw;
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int disk_byte;
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diskette_t disk[2];
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} drive_t;
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extern drive_t disk6;
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// initialize emulated 5.25 Disk ][ module
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extern void disk6_init(void);
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// insert 5.25 disk image file
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extern const char *disk6_insert(int drive, const char * const file_name, int force);
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// eject 5.25 disk image file
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extern const char *disk6_eject(int drive);
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// flush all I/O
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extern void disk6_flush(int drive);
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#if DISK_TRACING
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void c_toggle_disk_trace_6(const char *read_file, const char *write_file);
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void c_begin_disk_trace_6(const char *read_file, const char *write_file);
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void c_end_disk_trace_6(void);
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#endif
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#endif
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