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root/cebix/Frodo4/Src/1541d64.h

Comparing Frodo4/Src/1541d64.h (file contents):
Revision 1.3 by cebix, 2004-01-11T00:09:51Z vs.
Revision 1.6 by cebix, 2004-01-12T15:13:20Z

#	Line 1 | Line 1
1		/*
2	<	*  1541d64.h - 1541 emulation in .d64 file
2	>	*  1541d64.h - 1541 emulation in disk image files (.d64/.x64/zipcode)
3		*
4	<	*  Frodo (C) 1994-1997,2002-2003 Christian Bauer
4	>	*  Frodo (C) 1994-1997,2002-2004 Christian Bauer
5		*
6		*  This program is free software; you can redistribute it and/or modify
7		*  it under the terms of the GNU General Public License as published by
#	Line 24 | Line 24
24		#include "IEC.h"
25
26
27	<	// BAM structure
28	<	typedef struct {
29	<	uint8   dir_track;              // Track...
30	<	uint8   dir_sector;             // ...and sector of first directory block
31	<	int8    fmt_type;               // Format type
32	<	int8    pad0;
33	<	uint8   bitmap[4*35];   // Sector allocation
34	<	uint8   disk_name[18];  // Disk name
35	<	uint8   id[2];                  // Disk ID
36	<	int8    pad1;
37	<	uint8   fmt_char[2];    // Format characters
38	<	int8    pad2[4];
39	<	int8    pad3[85];
40	<	} BAM;
41	<
42	<	// Directory entry structure
43	<	typedef struct {
44	<	uint8   type;                   // File type
45	<	uint8   track;                  // Track...
46	<	uint8   sector;                 // ...and sector of first data block
47	<	uint8   name[16];               // File name
48	<	uint8   side_track;             // Track...
49	<	uint8   side_sector;    // ...and sector of first side sector
50	<	uint8   rec_len;                // Record length
51	<	int8    pad0[4];
52	<	uint8   ovr_track;              // Track...
53	<	uint8   ovr_sector;             // ...and sector on overwrite
54	<	uint8   num_blocks_l;   // Number of blocks, LSB
55	<	uint8   num_blocks_h;   // Number of blocks, MSB
56	<	int8    pad1[2];
57	<	} DirEntry;
58	<
59	<	// Directory block structure
60	<	typedef struct {
61	<	uint8           padding[2];             // Keep DirEntry word-aligned
62	<	uint8           next_track;
63	<	uint8           next_sector;
64	<	DirEntry        entry[8];
65	<	} Directory;
27	>	/*
28	>	*  Definitions
29	>	*/
30	>
31	>	// Constants
32	>	const int NUM_SECTORS_35 = 683; // Number of sectors in a 35-track image
33	>	const int NUM_SECTORS_40 = 768; // Number of sectors in a 40-track image
34	>
35	>	// Disk image types
36	>	enum {
37	>	TYPE_D64,                       // D64 file
38	>	TYPE_ED64,                      // Converted zipcode file (D64 with header ID)
39	>	TYPE_X64                        // x64 file
40	>	};
41
42	+	// Channel descriptor
43	+	struct channel_desc {
44	+	int mode;                       // Channel mode
45	+	bool writing;           // Flag: writing to file (for file channels)
46	+	int buf_num;            // Buffer number for direct access and file channels
47	+	uint8 *buf;                     // Pointer to start of buffer
48	+	uint8 *buf_ptr;         // Pointer to current position in buffer
49	+	int buf_len;            // Remaining bytes in buffer
50	+	int track, sector;      // Track and sector the buffer will be written to (for writing to file channels)
51	+	int num_blocks;         // Number of blocks in file (for writing to file channels)
52	+	int dir_track;          // Track...
53	+	int dir_sector;         // ...and sector of directory block containing file entry
54	+	int entry;                      // Number of entry in directory block
55	+	};
56
57	<	class D64Drive : public Drive {
57	>	// Disk image file descriptor
58	>	struct image_file_desc {
59	>	int type;                               // See definitions above
60	>	int header_size;                // Size of file header
61	>	int num_tracks;                 // Number of tracks
62	>	uint8 id1, id2;                 // Block header ID (as opposed to BAM ID)
63	>	uint8 error_info[NUM_SECTORS_40]; // Sector error information (1 byte/sector)
64	>	bool has_error_info;    // Flag: error info present in file
65	>	};
66	>
67	>	// Disk image drive class
68	>	class ImageDrive : public Drive {
69		public:
70	<	D64Drive(IEC *iec, char *filepath);
71	<	virtual ~D64Drive();
70	>	ImageDrive(IEC *iec, const char *filepath);
71	>	virtual ~ImageDrive();
72	>
73		virtual uint8 Open(int channel, const uint8 *name, int name_len);
74		virtual uint8 Close(int channel);
75	<	virtual uint8 Read(int channel, uint8 *byte);
75	>	virtual uint8 Read(int channel, uint8 &byte);
76		virtual uint8 Write(int channel, uint8 byte, bool eoi);
77		virtual void Reset(void);
78
79		private:
80	<	void open_close_d64_file(char *d64name);
80	>	void close_image(void);
81	>	bool change_image(const char *path);
82
83		uint8 open_file(int channel, const uint8 *name, int name_len);
82	–	bool find_file(const uint8 *pattern, int *track, int *sector);
84		uint8 open_file_ts(int channel, int track, int sector);
85	+	uint8 create_file(int channel, const uint8 *name, int name_len, int type, bool overwrite = false);
86		uint8 open_directory(const uint8 *pattern, int pattern_len);
87	<	uint8 open_direct(int channel, const uint8 *name);
88	<	void close_all_channels();
87	<
88	<	void block_read_cmd(int channel, int track, int sector, bool user_cmd = false);
89	<	void buffer_pointer_cmd(int channel, int pos);
90	<	void mem_read_cmd(uint16 adr, uint8 len);
91	<	void mem_write_cmd(uint16 adr, uint8 len, uint8 *p);
92	<	void initialize_cmd(void);
87	>	uint8 open_direct(int channel, const uint8 *filename);
88	>	void close_all_channels(void);
89
90		int alloc_buffer(int want);
91		void free_buffer(int buf);
92	+
93	+	bool find_file(const uint8 *pattern, int pattern_len, int &dir_track, int &dir_sector, int &entry, bool cont);
94	+	bool find_first_file(const uint8 *pattern, int pattern_len, int &dir_track, int &dir_sector, int &entry);
95	+	bool find_next_file(const uint8 *pattern, int pattern_len, int &dir_track, int &dir_sector, int &entry);
96	+	bool alloc_dir_entry(int &track, int &sector, int &entry);
97	+
98	+	bool is_block_free(int track, int sector);
99	+	int num_free_blocks(int track);
100	+	int alloc_block(int track, int sector);
101	+	int free_block(int track, int sector);
102	+	bool alloc_block_chain(int track, int sector);
103	+	bool free_block_chain(int track, int sector);
104	+	bool alloc_next_block(int &track, int &sector, int interleave);
105	+
106		bool read_sector(int track, int sector, uint8 *buffer);
107	<	int offset_from_ts(int track, int sector);
107	>	bool write_sector(int track, int sector, uint8 *buffer);
108	>	void write_error_info(void);
109
110	<	char orig_d64_name[256]; // Original path of .d64 file
110	>	virtual void block_read_cmd(int channel, int track, int sector, bool user_cmd = false);
111	>	virtual void block_write_cmd(int channel, int track, int sector, bool user_cmd = false);
112	>	virtual void block_allocate_cmd(int track, int sector);
113	>	virtual void block_free_cmd(int track, int sector);
114	>	virtual void buffer_pointer_cmd(int channel, int pos);
115	>	virtual void mem_read_cmd(uint16 adr, uint8 len);
116	>	virtual void mem_write_cmd(uint16 adr, uint8 len, uint8 *p);
117	>	virtual void copy_cmd(const uint8 *new_file, int new_file_len, const uint8 *old_files, int old_files_len);
118	>	virtual void rename_cmd(const uint8 *new_file, int new_file_len, const uint8 *old_file, int old_file_len);
119	>	virtual void scratch_cmd(const uint8 *files, int files_len);
120	>	virtual void initialize_cmd(void);
121	>	virtual void new_cmd(const uint8 *name, int name_len, const uint8 *comma);
122	>	virtual void validate_cmd(void);
123	>
124	>	FILE *the_file;                 // File pointer for image file
125	>	image_file_desc desc;   // Image file descriptor
126	>	bool write_protected;   // Flag: image file write-protected
127	>
128	>	uint8 ram[0x800];               // 2k 1541 RAM
129	>	uint8 dir[258];                 // Buffer for directory blocks
130	>	uint8 *bam;                             // Pointer to BAM in 1541 RAM (buffer 4, upper 256 bytes)
131	>	bool bam_dirty;                 // Flag: BAM modified, needs to be written back
132
133	<	FILE *the_file;                 // File pointer for .d64 file
133	>	channel_desc ch[18];    // Descriptors for channels 0..17 (16 = internal read, 17 = internal write)
134	>	bool buf_free[4];               // Flags: buffer 0..3 free?
135	>	};
136
103	–	uint8 *ram;                             // 2KB 1541 RAM
104	–	BAM *bam;                               // Pointer to BAM
105	–	Directory dir;                  // Buffer for directory blocks
137
138	<	int chan_mode[16];              // Channel mode
139	<	int chan_buf_num[16];   // Buffer number of channel (for direct access channels)
140	<	uint8 *chan_buf[16];    // Pointer to buffer
110	<	uint8 *buf_ptr[16];             // Pointer in buffer
111	<	int buf_len[16];                // Remaining bytes in buffer
138	>	/*
139	>	*  Functions
140	>	*/
141
142	<	bool buf_free[4];               // Buffer 0..3 free?
142	>	// Check whether file with given header (64 bytes) and size looks like one
143	>	// of the file types supported by this module
144	>	extern bool IsImageFile(const char *path, const uint8 *header, long size);
145
146	<	int image_header;               // Length of .d64 file header
146	>	// Create new blank disk image file
147	>	extern bool CreateImageFile(const char *path);
148
149	<	uint8 error_info[683];  // Sector error information (1 byte/sector)
150	<	};
149	>	// Open disk image file
150	>	extern FILE *open_image_file(const char *path, bool write_mode);
151	>
152	>	// Parse disk image file header, fill in descriptor
153	>	extern bool parse_image_file(FILE *f, image_file_desc &desc);
154	>
155	>	// Read/write sector from/to disk image file, return error code
156	>	extern int read_sector(FILE *f, const image_file_desc &desc, int track, int sector, uint8 *buffer);
157	>	extern int write_sector(FILE *f, const image_file_desc &desc, int track, int sector, uint8 *buffer);
158	>
159	>	// Format disk image
160	>	extern bool format_image(FILE *f, image_file_desc &desc, bool lowlevel, uint8 id1, uint8 id2, const uint8 *disk_name, int disk_name_len);
161	>
162	>	// Get number of sectors per track
163	>	extern int sectors_per_track(const image_file_desc &desc, int track);
164	>
165	>	// Get reference to error info byte of given track/sector
166	>	extern uint8 &error_info_for_sector(image_file_desc &desc, int track, int sector);
167	>
168	>	// Write error info back to image file
169	>	extern void write_back_error_info(FILE *f, const image_file_desc &desc);
170
171		#endif

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