/[projet1]/public/pc/tools/oric/dsk/READDSK.C
Defence Force logotype

Annotation of /public/pc/tools/oric/dsk/READDSK.C

Parent Directory Parent Directory | Revision Log Revision Log


Revision 21 - (hide annotations)
Mon Feb 23 21:53:50 2009 UTC (11 years, 3 months ago) by dbug
File MIME type: text/plain
File size: 8098 byte(s)
Added various tools (4k8, bas2txt, read and write disk, etc...)
1 dbug 21 /* Watcom compiler */
2     #include <i86.h>
3     #include <bios.h>
4     #include <stdio.h>
5     char *version="Readdsk 2.0";
6     char diskid[8]="MFM_DISK";
7     char pad[256];
8     int drive;
9     int tracks=0,sectors=0,sides=2;
10     char __far *biosparams;
11     struct diskinfo_t di;
12     FILE *fd;
13    
14     /***********************************************************************************/
15     /* writing to the virtual disk */
16     /***********************************************************************************/
17    
18     unsigned char trackbuf[6400];
19     int ptr_track;
20     int crc;
21    
22     int crctab[256]={
23     0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
24     0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
25     0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
26     0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
27     0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
28     0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
29     0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
30     0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
31     0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
32     0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
33     0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
34     0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
35     0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
36     0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
37     0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
38     0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
39     0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
40     0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
41     0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
42     0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
43     0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
44     0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
45     0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
46     0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
47     0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
48     0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
49     0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
50     0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
51     0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
52     0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
53     0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
54     0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
55     };
56    
57    
58     reset_crc()
59     {
60     crc=0xFFFF;
61     }
62    
63     int get_crc()
64     {
65     return crc;
66     }
67    
68     store_byte(int val)
69     {
70     trackbuf[ptr_track++]=val;
71     crc=crctab[(crc>>8)^val]^((crc&0xFF)<<8);
72     }
73    
74     store_address_mark(int mark)
75     {
76     reset_crc();
77     store_byte(0xA1);
78     store_byte(0xA1);
79     store_byte(0xA1);
80     store_byte(mark);
81     }
82    
83     store_id(int cyl,int head,int record,int n)
84     {
85     store_address_mark(0xFE);
86     store_byte(cyl);
87     store_byte(head);
88     store_byte(record);
89     store_byte(n);
90     }
91    
92     store_data(char buf[],int n)
93     {
94     int i, nbytes=128<<n;
95     store_address_mark(0xFB);
96     for (i=0;i<nbytes;i++) store_byte(buf[i]);
97     }
98    
99     store_crc()
100     {
101     int crc=get_crc();
102     store_byte(crc>>8);
103     store_byte(crc&0xFF);
104     }
105    
106     store_bad_crc()
107     {
108     store_byte(0);
109     store_byte(0);
110     }
111    
112     store_gap(int size,int val)
113     {
114     int i;
115     for (i=0;i<size;i++) store_byte(val);
116     }
117    
118     store_sector(char buf[],int cyl,int head,int sect,int sectsize)
119     {
120     store_gap(12,0);
121     store_id(cyl,head,sect,sectsize);
122     store_crc();
123     store_gap(22,0x4E);
124     store_gap(12,0)
125     store_data(buf,sectsize);
126     store_crc();
127     store_gap(40,0x4E);
128     }
129    
130     store_sector_bad_crc(char buf[],int cyl,int head,int sect,int sectsize)
131     {
132     store_gap(12,0);
133     store_id(cyl,head,sect,sectsize);
134     store_crc();
135     store_gap(22,0x4E);
136     store_gap(12,0)
137     store_data(buf,sectsize);
138     store_bad_crc();
139     store_gap(40,0x4E);
140     }
141    
142     init_track()
143     {
144     int i;
145     for (i=0;i<6400;i++) trackbuf[i]=0x4E;
146     ptr_track=0;
147     }
148    
149     flush_track(FILE *fd)
150     {
151     int i;
152     fwrite(trackbuf,6400,1,fd);
153     }
154    
155     /*********************************************************************************/
156     /* Reading floppy at bios level */
157     /*********************************************************************************/
158     #define OK 0
159     #define BADCRC 0x10
160     unsigned char buf[1024];
161    
162     int read_sector(int cyl,int head,int sect)
163     {
164     struct diskinfo_t di;
165     int try, status;
166    
167     for(try=0;try<3;try++) {
168     di.drive=drive;
169     di.head=head;
170     di.track=cyl;
171     di.sector=sect;
172     di.nsectors=1;
173     di.buffer=(char __far *)buf;
174     status = _bios_disk(_DISK_READ,&di) >> 8 ;
175     if (status==OK) break;
176     }
177     return status;
178     }
179    
180     void read_track(int cyl,int head,int sectsize)
181     {
182     int sectmax;
183     if (sectors) sectmax=sectors;
184     else switch (sectsize) {
185     case 0: sectmax=35; break; /* I don't know how many 128-bytes sectors fit in */
186     case 1: sectmax=18; break; /* 256-bytes sectors */
187     case 2: sectmax=10; break; /* 512-bytes sectors */
188     case 3: sectmax=5; break; /* 1024-bytes sectors */
189     }
190     init_track();
191     for (i=1;i<=sectmax;i++) {
192     status=read_sector(cyl,head,i);
193     if (status==OK) store_sector(buf,cyl,head,i,sectsize);
194     else if (status==BADCRC) store_sector_badcrc(buf,cyl,head,i,sectsize);
195     else break;
196     }
197     }
198    
199     int test_track(int track,int side,int &sectsize)
200     {
201     int n= (*sectsize);
202     int status;
203    
204     do {
205     status=read_sector(track,side,1,*sectsize);
206     if (status==OK || status==BADCRC) return status;
207     (*sectsize) = ((*sectsize)+1)&3);
208     biosparams[3]=(*sectsize);
209     di.drive=drive;
210     _bios_disk(_DISK_RESET,&di);
211     } while (*sectsize!=n);
212     return status;
213     }
214    
215    
216     int transfer_side(int side, FILE *fd)
217     {
218     int ntrack;
219     sectsize=biosparams[3]=1; /* most often, 256-bytes sectors will be read */
220     di.drive=drive;
221     _bios_disk(_DISK_RESET,&di);
222    
223     if (tracks) ntrack=tracks;
224     for (i=0;i<ntrack;i++) {
225     status=test_track(i,side,&sectsize);
226     if (status!=OK && status!=BADCRC) return i;
227     printf("Reading side %d track %d\n",side,i);
228     read_track(i,side,sectsize);
229     flush_track(fd);
230     }
231     return ntrack;
232     }
233    
234    
235     quit(char *msg)
236     {
237     printf(msg);
238     biosparams[3]=2; /* restore normal sector size (512) */
239     exit(0);
240     }
241    
242     usage()
243     {
244     printf("Usage: readdsk [options] <floppy-drive:> <disk-image>\n");
245     printf("Options:\n");
246     printf("\t-1 (read one side only)\n");
247     printf("\t-t:nn (specify number of tracks, e.g -t:42)\n");
248     printf("\t-s:nn (specify number of sectors per track, e.g -s:17)\n");
249     printf("Nota: specifying the sectors per track number prevents the program from searching\n");
250     printf("inexistent sectors\n");
251     exit(1);
252     }
253    
254     int scan_arg(char *arg)
255     {
256     if (arg[0]!=':' && arg[0]!='=') usage();
257     return atoi(arg+1);
258     }
259    
260     main(int argc,char *argv[])
261     {
262     FILE *fd;
263     int t,h,tracks,sides,geometry;
264     char diskid[8], *signature="MFM_DISK";
265    
266     printf("%s\n",version);
267     if (argc<3) usage();
268     for (i=1; i<argc-2; i++) {
269     if (argv[i][0]!='-' && argv[i][0]!='/') usage();
270     switch (argv[i][1]) {
271     case '1': sides=1; break;
272     case 't': tracks=scan_arg(argv[i]+2); break;
273     case 's': sectors=scan_arg(argv[i]+2); break;
274     default: usage();
275     }
276     }
277     if (strcmp(argv[i],"a:")==0 || strcmp(argv[i],"A:")==0)
278     drive=0;
279     else if (strcmp(argv[i],"b:")==0 || strcmp(argv[i],"B:")==0)
280     drive=1;
281     else {
282     printf("Invalid floppy drive specification (%s)\n",argv[2]);
283     exit(1);
284     }
285     fd=fopen(argv[argc-1],"wb");
286     if (fd==NULL) {
287     printf("Unable to open %s for writing\n",argv[argc-1]);
288     exit(1);
289     }
290     fwrite(pad,256,1,fd);
291     biosparams= *(char __far * __far *)MK_FP(0,4*0x1E);
292    
293     tracks=transfer_side(0,fd);
294     if (sides>1) transfer_side(1,fd);
295    
296     rewind(fd);
297     fwrite(diskid,8,1,fd);
298     fwrite(&sides,1,2,fd); fwrite(pad,1,2,fd);
299     fwrite(&tracks,1,2,fd); fwrite(pad,1,2,fd);
300     fwrite(&geometry,1,2,fd); fwrite(pad,1,2,fd);
301     fclose(fd);
302     }
303    

  ViewVC Help
Powered by ViewVC 1.1.26