Mercurial > hg > Members > kono > os9 > sbc09
annotate io.c @ 23:5217f23f2f9e
break point
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 09 Jul 2018 14:54:43 +0900 |
| parents | 10e33568b38a |
| children | 7b1b25ff010a |
| rev | line source |
|---|---|
| 9 | 1 /* 6808 Simulator V092 |
| 2 created 1993,1994 by L.C. Benschop. copyleft (c) 1994-2014 | |
| 3 by the sbc09 team, see AUTHORS for more details. license: | |
| 4 GNU General Public License version 2, see LICENSE for more | |
| 5 details. | |
| 0 | 6 |
| 7 This program simulates a 6809 processor. | |
| 8 | |
| 9 System dependencies: short must be 16 bits. | |
| 10 char must be 8 bits. | |
| 11 long must be more than 16 bits. | |
| 12 arrays up to 65536 bytes must be supported. | |
| 13 machine must be twos complement. | |
| 14 Most Unix machines will work. For MSODS you need long pointers | |
| 15 and you may have to malloc() the mem array of 65536 bytes. | |
| 16 | |
| 17 Define BIG_ENDIAN if you have a big-endian machine (680x0 etc) | |
| 18 | |
| 19 Special instructions: | |
| 20 SWI2 writes char to stdout from register B. | |
| 21 SWI3 reads char from stdout to register B, sets carry at EOF. | |
| 22 (or when no key available when using term control). | |
| 23 SWI retains its normal function. | |
| 24 CWAI and SYNC stop simulator. | |
| 25 | |
| 26 */ | |
| 27 | |
| 28 #include<stdio.h> | |
| 29 #include<stdlib.h> | |
| 30 #include<ctype.h> | |
| 31 #include<signal.h> | |
| 32 #include<sys/time.h> | |
| 33 | |
| 34 #include <unistd.h> | |
| 35 #include <fcntl.h> | |
| 36 #include <string.h> | |
| 1 | 37 #include <time.h> |
| 0 | 38 |
| 39 #ifdef USE_TERMIOS | |
| 40 #include <termios.h> | |
| 41 #endif | |
| 42 | |
| 43 #define engine extern | |
| 44 #include "v09.h" | |
| 45 | |
| 1 | 46 /* |
| 3 | 47 * IO Map ( can be overrupped by ROM ) |
| 48 * | |
|
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49 * IOPAGE ~ IOPAGE+0x7f |
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50 * for OS9 level2 |
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51 * IOPAGE 0xff80 means ioport beging 0xff80 but IOPAGE itself starts 0xff00 |
| 18 | 52 * 0xfe00-0xff7f, 0xffe0-0xffff can be used as ROM in fixed area |
| 1 | 53 * |
| 3 | 54 * IOPAGE + 0x00 ACIA control |
| 55 * IOPAGE + 0x01 ACIA data | |
| 1 | 56 * |
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57 * IOPAGE + 0x11 MMU Taskreg 0 system map, 1 user map |
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58 * IOPAGE + 0x20-0x27 MMU reg system map |
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59 * IOPAGE + 0x28-0x2f MMU reg user map |
| 3 | 60 * |
| 61 * on reset tr==0 and only IOPAGE is valid | |
| 62 * translatation occur only on non-IOPAGE | |
| 63 * mem == phymem + 0x70000 | |
| 64 * phy addr = phymem[ ( mmu[ adr >> 13 ] <<13 ) + (adr & 0x1fff ) ] | |
| 65 * tr=0 mmu=IOPAGE+0xa0 | |
| 66 * tr=1 mmu=IOPAGE+0xa8 | |
| 1 | 67 * |
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68 * IOPAGE + 0x30 Timer control 0x8f start timer/0x80 stop timer/0x04 update date |
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69 * IOPAGE + 0x31- YY/MM/DD/HH/MM/SS |
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70 * |
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71 * IOPAGE + 0x40 Disk control 0x81 read/0x55 write 0 ... ok / 0xff .. error |
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72 * IOPAGE + 0x41 drive no |
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73 * IOPAGE + 0x42 LSN2 |
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74 * IOPAGE + 0x43 LSN1 |
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75 * IOPAGE + 0x44 LSN0 |
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76 * IOPAGE + 0x45 ADR2 |
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77 * IOPAGE + 0x46 ADR1 |
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78 * |
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79 * |
| 1 | 80 */ |
| 81 | |
| 82 #define SECSIZE 256 | |
| 83 | |
| 19 | 84 |
| 0 | 85 int timer = 1; |
| 86 struct termios termsetting; | |
| 20 | 87 struct termios newterm; |
| 88 struct itimerval timercontrol; | |
| 0 | 89 |
| 20 | 90 int tflags; |
| 0 | 91 int xmstat; /* 0= no XMODEM transfer, 1=send, 2=receiver */ |
| 92 unsigned char xmbuf[132]; | |
| 93 int xidx; | |
| 94 int acknak; | |
| 95 int rcvdnak; | |
| 96 int blocknum; | |
| 97 | |
| 98 FILE *infile; | |
| 99 FILE *xfile; | |
| 20 | 100 FILE *logfile; |
| 1 | 101 FILE *disk[] = {0,0}; |
| 0 | 102 |
| 9 | 103 #ifdef USE_MMU |
| 104 extern char *prog ; // for disass | |
| 11 | 105 extern Byte * mem0(Byte *iphymem, Word adr, Byte *immu) ; |
| 9 | 106 #endif |
| 107 | |
| 20 | 108 extern int bpskip ; |
| 109 extern int stkskip ; | |
| 110 extern FILE *logfile; | |
| 0 | 111 |
| 1 | 112 void do_timer(int,int); |
| 113 void do_disk(int,int); | |
| 4 | 114 void do_mmu(int,int); |
| 0 | 115 |
| 116 int char_input(void) { | |
| 117 int c, w, sum; | |
| 118 if (!xmstat) { | |
| 119 if (infile) { | |
| 120 c = getc(infile); | |
| 121 if (c == EOF) { | |
| 122 fclose(infile); | |
| 123 infile = 0; | |
| 124 return char_input(); | |
| 125 } | |
| 126 if (c == '\n') | |
| 127 c = '\r'; | |
| 128 return c; | |
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129 } else { |
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130 usleep(100); |
| 0 | 131 return getchar(); |
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132 } |
| 0 | 133 } else if (xmstat == 1) { |
| 134 if (xidx) { | |
| 135 c = xmbuf[xidx++]; | |
| 136 if (xidx == 132) { | |
| 137 xidx = 0; | |
| 138 rcvdnak = EOF; | |
| 139 acknak = 6; | |
| 140 } | |
| 141 } else { | |
| 142 if ((acknak == 21 && rcvdnak == 21) || (acknak == 6 && rcvdnak == 6)) { | |
| 143 rcvdnak = 0; | |
| 144 memset(xmbuf, 0, 132); | |
| 145 w = fread(xmbuf + 3, 1, 128, xfile); | |
| 146 if (w) { | |
| 147 printf("Block %3d transmitted, ", blocknum); | |
| 148 xmbuf[0] = 1; | |
| 149 xmbuf[1] = blocknum; | |
| 150 xmbuf[2] = 255 - blocknum; | |
| 151 blocknum = (blocknum + 1) & 255; | |
| 152 sum = 0; | |
| 153 for (w = 3; w < 131; w++) | |
| 154 sum = (sum + xmbuf[w]) & 255; | |
| 155 xmbuf[131] = sum; | |
| 156 acknak = 6; | |
| 157 c = 1; | |
| 158 xidx = 1; | |
| 159 } else { | |
| 160 printf("EOT transmitted, "); | |
| 161 acknak = 4; | |
| 162 c = 4; | |
| 163 } | |
| 164 } else if (rcvdnak == 21) { | |
| 165 rcvdnak = 0; | |
| 166 printf("Block %3d retransmitted, ", xmbuf[1]); | |
| 167 c = xmbuf[xidx++]; /*retransmit the same block */ | |
| 168 } else | |
| 169 c = EOF; | |
| 170 } | |
| 171 return c; | |
| 172 } else { | |
| 173 if (acknak == 4) { | |
| 174 c = 6; | |
| 175 acknak = 0; | |
| 176 fclose(xfile); | |
| 177 xfile = 0; | |
| 178 xmstat = 0; | |
| 179 } else if (acknak) { | |
| 180 c = acknak; | |
| 181 acknak = 0; | |
| 182 } else | |
| 183 c = EOF; | |
| 184 if (c == 6) | |
| 185 printf("ACK\n"); | |
| 186 if (c == 21) | |
| 187 printf("NAK\n"); | |
| 188 return c; | |
| 189 } | |
| 190 } | |
| 191 | |
| 9 | 192 int do_input(int a) { |
| 0 | 193 static int c, f = EOF; |
| 18 | 194 if (a == 0+(IOPAGE&0x1ff)) { |
| 0 | 195 if (f == EOF) |
| 196 f = char_input(); | |
| 197 if (f != EOF) | |
| 198 c = f; | |
| 199 return 2 + (f != EOF); | |
| 18 | 200 } else if (a == 1+(IOPAGE&0x1ff)) { /*data port*/ |
| 0 | 201 if (f == EOF) |
| 202 f = char_input(); | |
| 203 if (f != EOF) { | |
| 204 c = f; | |
| 205 f = EOF; | |
| 206 } | |
| 207 return c; | |
| 208 } | |
| 18 | 209 return mem[(IOPAGE&0xfe00) + a]; |
| 0 | 210 } |
| 211 | |
| 212 void do_output(int a, int c) { | |
| 213 int i, sum; | |
| 18 | 214 if (a == 1+(IOPAGE&0x1ff)) { /* ACIA data port,ignore address */ |
| 0 | 215 if (!xmstat) { |
| 216 if (logfile && c != 127 && (c >= ' ' || c == '\n')) | |
| 217 putc(c, logfile); | |
| 218 putchar(c); | |
| 219 fflush(stdout); | |
| 220 } else if (xmstat == 1) { | |
| 221 rcvdnak = c; | |
| 222 if (c == 6 && acknak == 4) { | |
| 223 fclose(xfile); | |
| 224 xfile = 0; | |
| 225 xmstat = 0; | |
| 226 } | |
| 227 if (c == 6) | |
| 228 printf("ACK\n"); | |
| 229 if (c == 21) | |
| 230 printf("NAK\n"); | |
| 231 if (c == 24) { | |
| 232 printf("CAN\n"); | |
| 233 fclose(xfile); | |
| 234 xmstat = 0; | |
| 235 xfile = 0; | |
| 236 } | |
| 237 } else { | |
| 238 if (xidx == 0 && c == 4) { | |
| 239 acknak = 4; | |
| 240 printf("EOT received, "); | |
| 241 } | |
| 242 xmbuf[xidx++] = c; | |
| 243 if (xidx == 132) { | |
| 244 sum = 0; | |
| 245 for (i = 3; i < 131; i++) | |
| 246 sum = (sum + xmbuf[i]) & 255; | |
| 247 if (xmbuf[0] == 1 && xmbuf[1] == 255 - xmbuf[2] | |
| 248 && sum == xmbuf[131]) | |
| 249 acknak = 6; | |
| 250 else | |
| 251 acknak = 21; | |
| 252 printf("Block %3d received, ", xmbuf[1]); | |
| 253 if (blocknum == xmbuf[1]) { | |
| 254 blocknum = (blocknum + 1) & 255; | |
| 255 fwrite(xmbuf + 3, 1, 128, xfile); | |
| 256 } | |
| 257 xidx = 0; | |
| 258 } | |
| 259 } | |
| 18 | 260 } else if (a >= 0x40+(IOPAGE&0x1ff)) { /* disk */ |
| 11 | 261 do_disk(a,c); |
| 18 | 262 } else if (a >= 0x30+(IOPAGE&0x1ff)) { /* timer */ |
| 11 | 263 do_timer(a,c); |
| 18 | 264 } else if (a >= 0x10+(IOPAGE&0x1ff)) { /* mmu */ |
| 4 | 265 do_mmu(a,c); |
| 0 | 266 } |
| 267 } | |
| 268 | |
| 269 | |
| 1 | 270 void do_timer(int a, int c) { |
| 271 struct itimerval timercontrol; | |
| 18 | 272 if (a==0x30+(IOPAGE&0x1ff) && c==0x8f) { |
| 1 | 273 timercontrol.it_interval.tv_sec = 0; |
| 274 timercontrol.it_interval.tv_usec = 20000; | |
| 275 timercontrol.it_value.tv_sec = 0; | |
| 276 timercontrol.it_value.tv_usec = 20000; | |
| 277 setitimer(ITIMER_REAL, &timercontrol, NULL); | |
| 18 | 278 } else if (a==0x30+(IOPAGE&0x1ff) && c==0x80) { |
| 1 | 279 timercontrol.it_interval.tv_sec = 0; |
| 280 timercontrol.it_interval.tv_usec = 0; | |
| 281 setitimer(ITIMER_REAL, &timercontrol, NULL); | |
| 18 | 282 } else if (a==0x30+(IOPAGE&0x1ff) && c==0x04) { |
| 1 | 283 time_t tm = time(0); |
| 284 struct tm *t = localtime(&tm); | |
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285 mem[IOPAGE+0x31] = t->tm_year; |
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286 mem[IOPAGE+0x32] = t->tm_mon; |
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287 mem[IOPAGE+0x33] = t->tm_mday; |
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288 mem[IOPAGE+0x34] = t->tm_hour; |
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289 mem[IOPAGE+0x35] = t->tm_min; |
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290 mem[IOPAGE+0x36] = t->tm_sec; |
| 1 | 291 } else { |
| 18 | 292 mem[(IOPAGE&0xfe00)+a]=c; |
| 1 | 293 } |
| 294 } | |
| 295 | |
| 296 void do_disk(int a, int c) { | |
| 18 | 297 if (a!=0x40+(IOPAGE&0x1ff)) { |
| 298 mem[(IOPAGE&0xfe00)+a]=c; | |
| 1 | 299 return; |
| 300 } | |
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301 int drv = mem[IOPAGE+0x41]; |
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302 int lsn = (mem[IOPAGE+0x42]<<16) + (mem[IOPAGE+0x43]<<8) + mem[IOPAGE+0x44]; |
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303 int buf = (mem[IOPAGE+0x45]<<8) + mem[IOPAGE+0x46]; |
| 1 | 304 if (drv > 1 || disk[drv]==0) goto error; |
| 305 if (c==0x81) { | |
| 306 if (lseek(fileno(disk[drv]),lsn*SECSIZE,SEEK_SET)==-1) goto error; | |
| 307 if (read(fileno(disk[drv]),&mem[buf],SECSIZE)==-1) goto error; | |
| 308 } else if (c==0x55) { | |
| 309 if (lseek(fileno(disk[drv]),lsn*SECSIZE,SEEK_SET)==-1) goto error; | |
| 310 if (write(fileno(disk[drv]),&mem[buf],SECSIZE)==-1) goto error; | |
| 311 } | |
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312 mem[IOPAGE+0x40] = 0; |
| 1 | 313 return; |
| 314 error : | |
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315 mem[IOPAGE+0x40] = 0xff; |
| 1 | 316 } |
| 317 | |
| 4 | 318 void do_mmu(int a, int c) |
| 319 { | |
| 320 #ifdef USE_MMU | |
| 321 | |
| 18 | 322 if (a==0x11+(IOPAGE&0x1ff)) { |
| 13 | 323 if (c&1) { |
| 23 | 324 mmu = &mem[0xffa8]; |
| 13 | 325 } else { |
| 23 | 326 mmu = &mem[0xffa0]; |
| 4 | 327 } |
| 328 } | |
| 18 | 329 mem[(IOPAGE&0xfe00)+a] = c; // other register such as 0xffa0-0xffaf |
| 4 | 330 #endif |
| 331 } | |
| 332 | |
| 0 | 333 void timehandler(int sig) { |
| 334 attention = 1; | |
| 335 irq = 2; | |
| 336 signal(SIGALRM, timehandler); | |
| 337 } | |
| 338 | |
| 339 void handler(int sig) { | |
| 340 escape = 1; | |
| 341 attention = 1; | |
| 342 bpskip = 0; | |
| 343 stkskip = 0; | |
| 344 } | |
| 345 | |
| 20 | 346 void init_term(void) { |
| 347 tcgetattr(0, &termsetting); | |
| 348 tflags = fcntl(0, F_GETFL, 0); | |
| 349 } | |
| 350 | |
| 0 | 351 void set_term(char c) { |
| 352 signal(SIGQUIT, SIG_IGN); | |
| 353 signal(SIGTSTP, SIG_IGN); | |
| 354 signal(SIGINT, handler); | |
| 355 signal(SIGUSR1, handler); | |
| 356 newterm = termsetting; | |
| 357 newterm.c_iflag = newterm.c_iflag & ~INLCR & ~ICRNL; | |
| 358 newterm.c_lflag = newterm.c_lflag & ~ECHO & ~ICANON; | |
| 359 newterm.c_cc[VTIME] = 0; | |
| 360 newterm.c_cc[VMIN] = 1; | |
| 361 newterm.c_cc[VINTR] = escchar; | |
| 362 tcsetattr(0, TCSAFLUSH, &newterm); | |
| 363 fcntl(0, F_SETFL, tflags | O_NDELAY); /* Make input from stdin non-blocking */ | |
| 364 signal(SIGALRM, timehandler); | |
| 365 timercontrol.it_interval.tv_sec = 0; | |
| 366 timercontrol.it_interval.tv_usec = 20000; | |
| 367 timercontrol.it_value.tv_sec = 0; | |
| 368 timercontrol.it_value.tv_usec = 20000; | |
| 369 if (timer) | |
| 370 setitimer(ITIMER_REAL, &timercontrol, NULL); | |
| 371 } | |
| 20 | 372 |
| 373 void restore_term(void) { | |
| 22 | 374 termsetting.c_iflag = termsetting.c_iflag | INLCR | ICRNL; |
| 20 | 375 tcsetattr(0, TCSAFLUSH, &termsetting); |
| 376 fcntl(0, F_SETFL, tflags); | |
| 377 signal(SIGALRM, SIG_IGN); | |
| 378 } | |
| 379 | |
| 380 | |
| 381 | |
| 382 |