Mercurial > hg > Members > kono > os9 > sbc09
annotate io.c @ 44:b26c23331d02
add more function on vdisk
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
---|---|
date | Thu, 19 Jul 2018 11:31:17 +0900 |
parents | 01519215ec70 |
children | 07c84761da6f |
rev | line source |
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9 | 1 /* 6808 Simulator V092 |
34 | 2 created 1993,1994 by L.C. Benschop. copyleft (c) 1994-2014 |
3 by the sbc09 team, see AUTHORS for more details. license: GNU | |
4 General Public License version 2, see LICENSE for more details. | |
0 | 5 |
6 This program simulates a 6809 processor. | |
7 | |
8 System dependencies: short must be 16 bits. | |
9 char must be 8 bits. | |
10 long must be more than 16 bits. | |
11 arrays up to 65536 bytes must be supported. | |
12 machine must be twos complement. | |
13 Most Unix machines will work. For MSODS you need long pointers | |
14 and you may have to malloc() the mem array of 65536 bytes. | |
15 | |
16 Define BIG_ENDIAN if you have a big-endian machine (680x0 etc) | |
17 | |
18 Special instructions: | |
19 SWI2 writes char to stdout from register B. | |
20 SWI3 reads char from stdout to register B, sets carry at EOF. | |
21 (or when no key available when using term control). | |
22 SWI retains its normal function. | |
23 CWAI and SYNC stop simulator. | |
24 | |
25 */ | |
26 | |
27 #include<stdio.h> | |
28 #include<stdlib.h> | |
29 #include<ctype.h> | |
30 #include<signal.h> | |
31 #include<sys/time.h> | |
32 | |
33 #include <unistd.h> | |
34 #include <fcntl.h> | |
35 #include <string.h> | |
1 | 36 #include <time.h> |
0 | 37 |
38 #ifdef USE_TERMIOS | |
39 #include <termios.h> | |
40 #endif | |
41 | |
42 #define engine extern | |
43 #include "v09.h" | |
44 | |
1 | 45 /* |
3 | 46 * IO Map ( can be overrupped by ROM ) |
47 * | |
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48 * IOPAGE ~ IOPAGE+0x7f |
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49 * for OS9 level2 |
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50 * IOPAGE 0xff80 means ioport beging 0xff80 but IOPAGE itself starts 0xff00 |
34 | 51 * 0xfe00-0xff7f, 0xffe0-0xffff can be used as RAM in fixed area in level2 |
52 * and these are ROM in level1 | |
53 * | |
1 | 54 * |
3 | 55 * IOPAGE + 0x00 ACIA control |
56 * IOPAGE + 0x01 ACIA data | |
1 | 57 * |
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58 * IOPAGE + 0x11 MMU Taskreg 0 system map, 1 user map |
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59 * IOPAGE + 0x20-0x27 MMU reg system map |
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60 * IOPAGE + 0x28-0x2f MMU reg user map |
3 | 61 * |
62 * on reset tr==0 and only IOPAGE is valid | |
63 * translatation occur only on non-IOPAGE | |
64 * mem == phymem + 0x70000 | |
65 * phy addr = phymem[ ( mmu[ adr >> 13 ] <<13 ) + (adr & 0x1fff ) ] | |
66 * tr=0 mmu=IOPAGE+0xa0 | |
67 * tr=1 mmu=IOPAGE+0xa8 | |
1 | 68 * |
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69 * IOPAGE + 0x30 Timer control 0x8f start timer/0x80 stop timer/0x04 update date |
34 | 70 * read 0x10 bit menas timer |
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71 * IOPAGE + 0x31- YY/MM/DD/HH/MM/SS |
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72 * |
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73 * IOPAGE + 0x40 Disk control 0x81 read/0x55 write 0 ... ok / 0xff .. error |
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74 * IOPAGE + 0x41 drive no / ( VDISK 0 for system, 1 for user ) |
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75 * IOPAGE + 0x42 LSN2 |
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76 * IOPAGE + 0x43 LSN1 |
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77 * IOPAGE + 0x44 LSN0 |
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78 * IOPAGE + 0x45 ADR2 |
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79 * IOPAGE + 0x46 ADR1 |
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80 * |
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81 * |
1 | 82 */ |
83 | |
84 #define SECSIZE 256 | |
85 | |
19 | 86 |
0 | 87 int timer = 1; |
88 struct termios termsetting; | |
20 | 89 struct termios newterm; |
90 struct itimerval timercontrol; | |
0 | 91 |
20 | 92 int tflags; |
0 | 93 int xmstat; /* 0= no XMODEM transfer, 1=send, 2=receiver */ |
94 unsigned char xmbuf[132]; | |
95 int xidx; | |
96 int acknak; | |
97 int rcvdnak; | |
98 int blocknum; | |
34 | 99 int timer_irq = 2 ; // 2 = FIRQ, 1 = IRQ |
0 | 100 |
101 FILE *infile; | |
102 FILE *xfile; | |
20 | 103 FILE *logfile; |
1 | 104 FILE *disk[] = {0,0}; |
0 | 105 |
9 | 106 #ifdef USE_MMU |
107 extern char *prog ; // for disass | |
11 | 108 extern Byte * mem0(Byte *iphymem, Word adr, Byte *immu) ; |
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109 #define pmem(a) mem0(phymem,a,mmu) |
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110 #else |
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111 #define pmem(a) (&mem[a]) |
9 | 112 #endif |
113 | |
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114 |
20 | 115 extern int bpskip ; |
116 extern int stkskip ; | |
117 extern FILE *logfile; | |
0 | 118 |
1 | 119 void do_timer(int,int); |
120 void do_disk(int,int); | |
4 | 121 void do_mmu(int,int); |
0 | 122 |
123 int char_input(void) { | |
124 int c, w, sum; | |
125 if (!xmstat) { | |
126 if (infile) { | |
127 c = getc(infile); | |
128 if (c == EOF) { | |
129 fclose(infile); | |
130 infile = 0; | |
131 return char_input(); | |
132 } | |
133 if (c == '\n') | |
134 c = '\r'; | |
135 return c; | |
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136 } else { |
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137 usleep(100); |
0 | 138 return getchar(); |
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139 } |
0 | 140 } else if (xmstat == 1) { |
141 if (xidx) { | |
142 c = xmbuf[xidx++]; | |
143 if (xidx == 132) { | |
144 xidx = 0; | |
145 rcvdnak = EOF; | |
146 acknak = 6; | |
147 } | |
148 } else { | |
149 if ((acknak == 21 && rcvdnak == 21) || (acknak == 6 && rcvdnak == 6)) { | |
150 rcvdnak = 0; | |
151 memset(xmbuf, 0, 132); | |
152 w = fread(xmbuf + 3, 1, 128, xfile); | |
153 if (w) { | |
154 printf("Block %3d transmitted, ", blocknum); | |
155 xmbuf[0] = 1; | |
156 xmbuf[1] = blocknum; | |
157 xmbuf[2] = 255 - blocknum; | |
158 blocknum = (blocknum + 1) & 255; | |
159 sum = 0; | |
160 for (w = 3; w < 131; w++) | |
161 sum = (sum + xmbuf[w]) & 255; | |
162 xmbuf[131] = sum; | |
163 acknak = 6; | |
164 c = 1; | |
165 xidx = 1; | |
166 } else { | |
167 printf("EOT transmitted, "); | |
168 acknak = 4; | |
169 c = 4; | |
170 } | |
171 } else if (rcvdnak == 21) { | |
172 rcvdnak = 0; | |
173 printf("Block %3d retransmitted, ", xmbuf[1]); | |
174 c = xmbuf[xidx++]; /*retransmit the same block */ | |
175 } else | |
176 c = EOF; | |
177 } | |
178 return c; | |
179 } else { | |
180 if (acknak == 4) { | |
181 c = 6; | |
182 acknak = 0; | |
183 fclose(xfile); | |
184 xfile = 0; | |
185 xmstat = 0; | |
186 } else if (acknak) { | |
187 c = acknak; | |
188 acknak = 0; | |
189 } else | |
190 c = EOF; | |
191 if (c == 6) | |
192 printf("ACK\n"); | |
193 if (c == 21) | |
194 printf("NAK\n"); | |
195 return c; | |
196 } | |
197 } | |
198 | |
9 | 199 int do_input(int a) { |
0 | 200 static int c, f = EOF; |
18 | 201 if (a == 0+(IOPAGE&0x1ff)) { |
0 | 202 if (f == EOF) |
203 f = char_input(); | |
34 | 204 if (f != EOF) { |
0 | 205 c = f; |
34 | 206 mem[(IOPAGE&0xfe00) + a] = c; |
207 } | |
208 mem[(IOPAGE&0xfe00) + a] = c = 2 + (f != EOF); | |
209 return c; | |
18 | 210 } else if (a == 1+(IOPAGE&0x1ff)) { /*data port*/ |
0 | 211 if (f == EOF) |
212 f = char_input(); | |
213 if (f != EOF) { | |
214 c = f; | |
215 f = EOF; | |
34 | 216 mem[(IOPAGE&0xfe00) + a] = c; |
0 | 217 } |
218 return c; | |
219 } | |
18 | 220 return mem[(IOPAGE&0xfe00) + a]; |
0 | 221 } |
222 | |
223 void do_output(int a, int c) { | |
224 int i, sum; | |
18 | 225 if (a == 1+(IOPAGE&0x1ff)) { /* ACIA data port,ignore address */ |
0 | 226 if (!xmstat) { |
227 if (logfile && c != 127 && (c >= ' ' || c == '\n')) | |
228 putc(c, logfile); | |
229 putchar(c); | |
230 fflush(stdout); | |
231 } else if (xmstat == 1) { | |
232 rcvdnak = c; | |
233 if (c == 6 && acknak == 4) { | |
234 fclose(xfile); | |
235 xfile = 0; | |
236 xmstat = 0; | |
237 } | |
238 if (c == 6) | |
239 printf("ACK\n"); | |
240 if (c == 21) | |
241 printf("NAK\n"); | |
242 if (c == 24) { | |
243 printf("CAN\n"); | |
244 fclose(xfile); | |
245 xmstat = 0; | |
246 xfile = 0; | |
247 } | |
248 } else { | |
249 if (xidx == 0 && c == 4) { | |
250 acknak = 4; | |
251 printf("EOT received, "); | |
252 } | |
253 xmbuf[xidx++] = c; | |
254 if (xidx == 132) { | |
255 sum = 0; | |
256 for (i = 3; i < 131; i++) | |
257 sum = (sum + xmbuf[i]) & 255; | |
258 if (xmbuf[0] == 1 && xmbuf[1] == 255 - xmbuf[2] | |
259 && sum == xmbuf[131]) | |
260 acknak = 6; | |
261 else | |
262 acknak = 21; | |
263 printf("Block %3d received, ", xmbuf[1]); | |
264 if (blocknum == xmbuf[1]) { | |
265 blocknum = (blocknum + 1) & 255; | |
266 fwrite(xmbuf + 3, 1, 128, xfile); | |
267 } | |
268 xidx = 0; | |
269 } | |
270 } | |
18 | 271 } else if (a >= 0x40+(IOPAGE&0x1ff)) { /* disk */ |
11 | 272 do_disk(a,c); |
18 | 273 } else if (a >= 0x30+(IOPAGE&0x1ff)) { /* timer */ |
11 | 274 do_timer(a,c); |
18 | 275 } else if (a >= 0x10+(IOPAGE&0x1ff)) { /* mmu */ |
4 | 276 do_mmu(a,c); |
35 | 277 #ifdef USE_MMU |
278 } else { /* fixed ram */ | |
279 mem[ a + 0xfe00 ] = c; | |
280 #endif | |
0 | 281 } |
282 } | |
283 | |
284 | |
1 | 285 void do_timer(int a, int c) { |
286 struct itimerval timercontrol; | |
18 | 287 if (a==0x30+(IOPAGE&0x1ff) && c==0x8f) { |
1 | 288 timercontrol.it_interval.tv_sec = 0; |
289 timercontrol.it_interval.tv_usec = 20000; | |
290 timercontrol.it_value.tv_sec = 0; | |
291 timercontrol.it_value.tv_usec = 20000; | |
34 | 292 timer_irq = 1; |
1 | 293 setitimer(ITIMER_REAL, &timercontrol, NULL); |
34 | 294 mem[(IOPAGE&0xfe00)+a]=c; |
18 | 295 } else if (a==0x30+(IOPAGE&0x1ff) && c==0x80) { |
1 | 296 timercontrol.it_interval.tv_sec = 0; |
297 timercontrol.it_interval.tv_usec = 0; | |
298 setitimer(ITIMER_REAL, &timercontrol, NULL); | |
34 | 299 mem[(IOPAGE&0xfe00)+a]=c; |
18 | 300 } else if (a==0x30+(IOPAGE&0x1ff) && c==0x04) { |
1 | 301 time_t tm = time(0); |
302 struct tm *t = localtime(&tm); | |
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303 mem[IOPAGE+0x31] = t->tm_year; |
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304 mem[IOPAGE+0x32] = t->tm_mon; |
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305 mem[IOPAGE+0x33] = t->tm_mday; |
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306 mem[IOPAGE+0x34] = t->tm_hour; |
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307 mem[IOPAGE+0x35] = t->tm_min; |
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308 mem[IOPAGE+0x36] = t->tm_sec; |
1 | 309 } else { |
18 | 310 mem[(IOPAGE&0xfe00)+a]=c; |
1 | 311 } |
312 } | |
313 | |
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314 |
1 | 315 void do_disk(int a, int c) { |
18 | 316 if (a!=0x40+(IOPAGE&0x1ff)) { |
317 mem[(IOPAGE&0xfe00)+a]=c; | |
1 | 318 return; |
319 } | |
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320 int drv = mem[IOPAGE+0x41]; |
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321 int lsn = (mem[IOPAGE+0x42]<<16) + (mem[IOPAGE+0x43]<<8) + mem[IOPAGE+0x44]; |
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322 int buf = (mem[IOPAGE+0x45]<<8) + mem[IOPAGE+0x46]; |
1 | 323 if (drv > 1 || disk[drv]==0) goto error; |
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324 Byte *phy = pmem(buf); |
1 | 325 if (c==0x81) { |
326 if (lseek(fileno(disk[drv]),lsn*SECSIZE,SEEK_SET)==-1) goto error; | |
30 | 327 if (read(fileno(disk[drv]),phy,SECSIZE)==-1) goto error; |
1 | 328 } else if (c==0x55) { |
329 if (lseek(fileno(disk[drv]),lsn*SECSIZE,SEEK_SET)==-1) goto error; | |
30 | 330 if (write(fileno(disk[drv]),phy,SECSIZE)==-1) goto error; |
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331 #ifdef VDISK |
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332 } else { |
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333 do_vdisk(c); |
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334 #endif |
1 | 335 } |
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336 mem[IOPAGE+0x40] = 0; |
1 | 337 return; |
338 error : | |
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339 mem[IOPAGE+0x40] = 0xff; |
1 | 340 } |
341 | |
4 | 342 void do_mmu(int a, int c) |
343 { | |
344 #ifdef USE_MMU | |
345 | |
18 | 346 if (a==0x11+(IOPAGE&0x1ff)) { |
13 | 347 if (c&1) { |
23 | 348 mmu = &mem[0xffa8]; |
13 | 349 } else { |
23 | 350 mmu = &mem[0xffa0]; |
4 | 351 } |
352 } | |
18 | 353 mem[(IOPAGE&0xfe00)+a] = c; // other register such as 0xffa0-0xffaf |
4 | 354 #endif |
355 } | |
356 | |
0 | 357 void timehandler(int sig) { |
358 attention = 1; | |
359 irq = 2; | |
34 | 360 mem[(IOPAGE&0xfe00)+0x30] |= 0x10 ; |
361 // signal(SIGALRM, timehandler); | |
0 | 362 } |
363 | |
364 void handler(int sig) { | |
365 escape = 1; | |
366 attention = 1; | |
367 bpskip = 0; | |
368 stkskip = 0; | |
369 } | |
370 | |
20 | 371 void init_term(void) { |
372 tcgetattr(0, &termsetting); | |
373 tflags = fcntl(0, F_GETFL, 0); | |
374 } | |
375 | |
0 | 376 void set_term(char c) { |
377 signal(SIGQUIT, SIG_IGN); | |
378 signal(SIGTSTP, SIG_IGN); | |
379 signal(SIGINT, handler); | |
380 signal(SIGUSR1, handler); | |
381 newterm = termsetting; | |
382 newterm.c_iflag = newterm.c_iflag & ~INLCR & ~ICRNL; | |
383 newterm.c_lflag = newterm.c_lflag & ~ECHO & ~ICANON; | |
384 newterm.c_cc[VTIME] = 0; | |
385 newterm.c_cc[VMIN] = 1; | |
386 newterm.c_cc[VINTR] = escchar; | |
387 tcsetattr(0, TCSAFLUSH, &newterm); | |
388 fcntl(0, F_SETFL, tflags | O_NDELAY); /* Make input from stdin non-blocking */ | |
389 signal(SIGALRM, timehandler); | |
390 timercontrol.it_interval.tv_sec = 0; | |
391 timercontrol.it_interval.tv_usec = 20000; | |
392 timercontrol.it_value.tv_sec = 0; | |
393 timercontrol.it_value.tv_usec = 20000; | |
394 if (timer) | |
395 setitimer(ITIMER_REAL, &timercontrol, NULL); | |
396 } | |
20 | 397 |
398 void restore_term(void) { | |
22 | 399 termsetting.c_iflag = termsetting.c_iflag | INLCR | ICRNL; |
20 | 400 tcsetattr(0, TCSAFLUSH, &termsetting); |
401 fcntl(0, F_SETFL, tflags); | |
402 signal(SIGALRM, SIG_IGN); | |
403 } | |
404 | |
405 | |
406 | |
407 |