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root/cebix/Frodo4/Src/IEC.h
Revision: 1.8
Committed: 2005-06-27T19:55:48Z (17 years, 5 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

# Content
1 /*
2 * IEC.h - IEC bus routines, 1541 emulation (DOS level)
3 *
4 * Frodo (C) 1994-1997,2002-2005 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
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 _IEC_H
22 #define _IEC_H
23
24
25 /*
26 * Definitions
27 */
28
29 // Maximum length of file names
30 const int NAMEBUF_LENGTH = 256;
31
32 // C64 status codes
33 enum {
34 ST_OK = 0, // No error
35 ST_READ_TIMEOUT = 0x02, // Timeout on reading
36 ST_TIMEOUT = 0x03, // Timeout
37 ST_EOF = 0x40, // End of file
38 ST_NOTPRESENT = 0x80 // Device not present
39 };
40
41 // 1541 error codes
42 enum {
43 ERR_OK, // 00 OK
44 ERR_SCRATCHED, // 01 FILES SCRATCHED
45 ERR_UNIMPLEMENTED, // 03 UNIMPLEMENTED
46 ERR_READ20, // 20 READ ERROR (block header not found)
47 ERR_READ21, // 21 READ ERROR (no sync character)
48 ERR_READ22, // 22 READ ERROR (data block not present)
49 ERR_READ23, // 23 READ ERROR (checksum error in data block)
50 ERR_READ24, // 24 READ ERROR (byte decoding error)
51 ERR_WRITE25, // 25 WRITE ERROR (write-verify error)
52 ERR_WRITEPROTECT, // 26 WRITE PROTECT ON
53 ERR_READ27, // 27 READ ERROR (checksum error in header)
54 ERR_WRITE28, // 28 WRITE ERROR (long data block)
55 ERR_DISKID, // 29 DISK ID MISMATCH
56 ERR_SYNTAX30, // 30 SYNTAX ERROR (general syntax)
57 ERR_SYNTAX31, // 31 SYNTAX ERROR (invalid command)
58 ERR_SYNTAX32, // 32 SYNTAX ERROR (command too long)
59 ERR_SYNTAX33, // 33 SYNTAX ERROR (wildcards on writing)
60 ERR_SYNTAX34, // 34 SYNTAX ERROR (missing file name)
61 ERR_WRITEFILEOPEN, // 60 WRITE FILE OPEN
62 ERR_FILENOTOPEN, // 61 FILE NOT OPEN
63 ERR_FILENOTFOUND, // 62 FILE NOT FOUND
64 ERR_FILEEXISTS, // 63 FILE EXISTS
65 ERR_FILETYPE, // 64 FILE TYPE MISMATCH
66 ERR_NOBLOCK, // 65 NO BLOCK
67 ERR_ILLEGALTS, // 66 ILLEGAL TRACK OR SECTOR
68 ERR_NOCHANNEL, // 70 NO CHANNEL
69 ERR_DIRERROR, // 71 DIR ERROR
70 ERR_DISKFULL, // 72 DISK FULL
71 ERR_STARTUP, // 73 Power-up message
72 ERR_NOTREADY // 74 DRIVE NOT READY
73 };
74
75 // Mountable file types
76 enum {
77 FILE_IMAGE, // Disk image, handled by ImageDrive
78 FILE_ARCH // Archive file, handled by ArchDrive
79 };
80
81 // 1541 file types
82 enum {
83 FTYPE_DEL, // Deleted
84 FTYPE_SEQ, // Sequential
85 FTYPE_PRG, // Program
86 FTYPE_USR, // User
87 FTYPE_REL, // Relative
88 FTYPE_UNKNOWN
89 };
90
91 static const char ftype_char[9] = "DSPUL ";
92
93 // 1541 file access modes
94 enum {
95 FMODE_READ, // Read
96 FMODE_WRITE, // Write
97 FMODE_APPEND, // Append
98 FMODE_M // Read open file
99 };
100
101 // Drive LED states
102 enum {
103 DRVLED_OFF, // Inactive, LED off
104 DRVLED_ON, // Active, LED on
105 DRVLED_ERROR // Error, blink LED
106 };
107
108 // Information about file in disk image/archive file
109 struct c64_dir_entry {
110 c64_dir_entry(const uint8 *n, int t, bool o, bool p, size_t s, off_t ofs = 0, uint8 sal = 0, uint8 sah = 0)
111 : type(t), is_open(o), is_protected(p), size(s), offset(ofs), sa_lo(sal), sa_hi(sah)
112 {
113 strncpy((char *)name, (const char *)n, 17);
114 name[16] = 0;
115 }
116
117 // Basic information
118 uint8 name[17]; // File name (C64 charset, null-terminated)
119 int type; // File type (see defines above)
120 bool is_open; // Flag: file open
121 bool is_protected; // Flag: file protected
122 size_t size; // File size (may be approximated)
123
124 // Special information
125 off_t offset; // Offset of file in archive file
126 uint8 sa_lo, sa_hi; // C64 start address
127 };
128
129 class Drive;
130 class C64Display;
131 class Prefs;
132
133 // Class for complete IEC bus system with drives 8..11
134 class IEC {
135 public:
136 IEC(C64Display *display);
137 ~IEC();
138
139 void Reset(void);
140 void NewPrefs(Prefs *prefs);
141 void UpdateLEDs(void);
142
143 uint8 Out(uint8 byte, bool eoi);
144 uint8 OutATN(uint8 byte);
145 uint8 OutSec(uint8 byte);
146 uint8 In(uint8 &byte);
147 void SetATN(void);
148 void RelATN(void);
149 void Turnaround(void);
150 void Release(void);
151
152 private:
153 Drive *create_drive(const char *path);
154
155 uint8 listen(int device);
156 uint8 talk(int device);
157 uint8 unlisten(void);
158 uint8 untalk(void);
159 uint8 sec_listen(void);
160 uint8 sec_talk(void);
161 uint8 open_out(uint8 byte, bool eoi);
162 uint8 data_out(uint8 byte, bool eoi);
163 uint8 data_in(uint8 &byte);
164
165 C64Display *the_display; // Pointer to display object (for drive LEDs)
166
167 uint8 name_buf[NAMEBUF_LENGTH]; // Buffer for file names and command strings
168 uint8 *name_ptr; // Pointer for reception of file name
169 int name_len; // Received length of file name
170
171 Drive *drive[4]; // 4 drives (8..11)
172
173 Drive *listener; // Pointer to active listener
174 Drive *talker; // Pointer to active talker
175
176 bool listener_active; // Listener selected, listener_data is valid
177 bool talker_active; // Talker selected, talker_data is valid
178 bool listening; // Last ATN was listen (to decide between sec_listen/sec_talk)
179
180 uint8 received_cmd; // Received command code ($x0)
181 uint8 sec_addr; // Received secondary address ($0x)
182 };
183
184 // Abstract superclass for individual drives
185 class Drive {
186 public:
187 Drive(IEC *iec);
188 virtual ~Drive() {}
189
190 virtual uint8 Open(int channel, const uint8 *name, int name_len)=0;
191 virtual uint8 Close(int channel)=0;
192 virtual uint8 Read(int channel, uint8 &byte)=0;
193 virtual uint8 Write(int channel, uint8 byte, bool eoi)=0;
194 virtual void Reset(void)=0;
195
196 int LED; // Drive LED state
197 bool Ready; // Drive is ready for operation
198
199 protected:
200 void set_error(int error, int track = 0, int sector = 0);
201
202 void parse_file_name(const uint8 *src, int src_len, uint8 *dest, int &dest_len, int &mode, int &type, int &rec_len, bool convert_charset = false);
203
204 void execute_cmd(const uint8 *cmd, int cmd_len);
205 virtual void block_read_cmd(int channel, int track, int sector, bool user_cmd = false);
206 virtual void block_write_cmd(int channel, int track, int sector, bool user_cmd = false);
207 virtual void block_execute_cmd(int channel, int track, int sector);
208 virtual void block_allocate_cmd(int track, int sector);
209 virtual void block_free_cmd(int track, int sector);
210 virtual void buffer_pointer_cmd(int channel, int pos);
211 virtual void mem_read_cmd(uint16 adr, uint8 len);
212 virtual void mem_write_cmd(uint16 adr, uint8 len, uint8 *p);
213 virtual void mem_execute_cmd(uint16 adr);
214 virtual void copy_cmd(const uint8 *new_file, int new_file_len, const uint8 *old_files, int old_files_len);
215 virtual void rename_cmd(const uint8 *new_file, int new_file_len, const uint8 *old_file, int old_file_len);
216 virtual void scratch_cmd(const uint8 *files, int files_len);
217 virtual void position_cmd(const uint8 *cmd, int cmd_len);
218 virtual void initialize_cmd(void);
219 virtual void new_cmd(const uint8 *name, int name_len, const uint8 *comma);
220 virtual void validate_cmd(void);
221 void unsupp_cmd(void);
222
223 char error_buf[256]; // Buffer with current error message
224 char *error_ptr; // Pointer within error message
225 int error_len; // Remaining length of error message
226 int current_error; // Number of current error
227
228 uint8 cmd_buf[64]; // Buffer for incoming command strings
229 int cmd_len; // Length of received command
230
231 private:
232 IEC *the_iec; // Pointer to IEC object
233 };
234
235
236 /*
237 * Functions
238 */
239
240 // Convert ASCII character to PETSCII character
241 extern uint8 ascii2petscii(char c);
242
243 // Convert ASCII string to PETSCII string
244 extern void ascii2petscii(uint8 *dest, const char *src, int max);
245
246 // Convert PETSCII character to ASCII character
247 extern char petscii2ascii(uint8 c);
248
249 // Convert PETSCII string to ASCII string
250 extern void petscii2ascii(char *dest, const uint8 *src, int max);
251
252 // Check whether file is a mountable disk image or archive file, return type
253 extern bool IsMountableFile(const char *path, int &type);
254
255 // Read directory of mountable disk image or archive file into c64_dir_entry vector
256 extern bool ReadDirectory(const char *path, int type, vector<c64_dir_entry> &vec);
257
258 #endif