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root/cebix/Frodo4/Src/1541d64.h
Revision: 1.8
Committed: 2005-06-27T19:55:48Z (17 years, 7 months ago) by cebix
Content type: text/plain
Branch: MAIN
CVS Tags: VERSION_4_2, HEAD
Changes since 1.7: +1 -1 lines
Log Message:
updated copyright dates

File Contents

# User Rev Content
1 cebix 1.1 /*
2 cebix 1.4 * 1541d64.h - 1541 emulation in disk image files (.d64/.x64/zipcode)
3 cebix 1.1 *
4 cebix 1.8 * Frodo (C) 1994-1997,2002-2005 Christian Bauer
5 cebix 1.1 *
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
8     * the Free Software Foundation; either version 2 of the License, or
9     * (at your option) any later version.
10     *
11     * This program is distributed in the hope that it will be useful,
12     * but WITHOUT ANY WARRANTY; without even the implied warranty of
13     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14     * GNU General Public License for more details.
15     *
16     * You should have received a copy of the GNU General Public License
17     * along with this program; if not, write to the Free Software
18     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19     */
20    
21     #ifndef _1541D64_H
22     #define _1541D64_H
23    
24     #include "IEC.h"
25    
26    
27 cebix 1.4 /*
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 cebix 1.1
57 cebix 1.4 // 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 cebix 1.1
67 cebix 1.4 // Disk image drive class
68 cebix 1.5 class ImageDrive : public Drive {
69 cebix 1.1 public:
70 cebix 1.5 ImageDrive(IEC *iec, const char *filepath);
71     virtual ~ImageDrive();
72 cebix 1.4
73 cebix 1.3 virtual uint8 Open(int channel, const uint8 *name, int name_len);
74 cebix 1.1 virtual uint8 Close(int channel);
75 cebix 1.4 virtual uint8 Read(int channel, uint8 &byte);
76 cebix 1.1 virtual uint8 Write(int channel, uint8 byte, bool eoi);
77     virtual void Reset(void);
78    
79     private:
80 cebix 1.4 void close_image(void);
81     bool change_image(const char *path);
82 cebix 1.3
83     uint8 open_file(int channel, const uint8 *name, int name_len);
84 cebix 1.1 uint8 open_file_ts(int channel, int track, int sector);
85 cebix 1.4 uint8 create_file(int channel, const uint8 *name, int name_len, int type, bool overwrite = false);
86 cebix 1.3 uint8 open_directory(const uint8 *pattern, int pattern_len);
87 cebix 1.4 uint8 open_direct(int channel, const uint8 *filename);
88     void close_all_channels(void);
89 cebix 1.3
90 cebix 1.1 int alloc_buffer(int want);
91     void free_buffer(int buf);
92 cebix 1.4
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 cebix 1.1 bool read_sector(int track, int sector, uint8 *buffer);
107 cebix 1.4 bool write_sector(int track, int sector, uint8 *buffer);
108     void write_error_info(void);
109 cebix 1.1
110 cebix 1.4 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 cebix 1.1
133 cebix 1.4 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    
137    
138     /*
139     * Functions
140     */
141    
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 cebix 1.1
146 cebix 1.7 // Read directory of disk image file into (empty) c64_dir_entry vector
147     extern bool ReadImageDirectory(const char *path, vector<c64_dir_entry> &vec);
148    
149 cebix 1.4 // Create new blank disk image file
150     extern bool CreateImageFile(const char *path);
151 cebix 1.1
152     #endif