Mercurial > hg > Members > kono > os9 > sbc09
annotate io.c @ 45:07c84761da6f
dd vrbf asm code
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Thu, 19 Jul 2018 16:21:47 +0900 |
| parents | b26c23331d02 |
| children | ec9f494497e1 |
| rev | line source |
|---|---|
| 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 |
| 45 | 74 * 0xd1- VDISK command |
| 75 * IOPAGE + 0x41 drive no / VDISK drv | |
| 76 * IOPAGE + 0x42 LSN2 / VDISK sysmode 0 for system, 1 for user | |
| 77 * IOPAGE + 0x43 LSN1 / VDISK Curdir pd number | |
| 78 * IOPAGE + 0x44 LSN0 / VDISK file attribute | |
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79 * IOPAGE + 0x45 ADR2 |
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80 * IOPAGE + 0x46 ADR1 |
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81 * |
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82 * |
| 1 | 83 */ |
| 84 | |
| 85 #define SECSIZE 256 | |
| 86 | |
| 19 | 87 |
| 0 | 88 int timer = 1; |
| 89 struct termios termsetting; | |
| 20 | 90 struct termios newterm; |
| 91 struct itimerval timercontrol; | |
| 0 | 92 |
| 20 | 93 int tflags; |
| 0 | 94 int xmstat; /* 0= no XMODEM transfer, 1=send, 2=receiver */ |
| 95 unsigned char xmbuf[132]; | |
| 96 int xidx; | |
| 97 int acknak; | |
| 98 int rcvdnak; | |
| 99 int blocknum; | |
| 34 | 100 int timer_irq = 2 ; // 2 = FIRQ, 1 = IRQ |
| 0 | 101 |
| 102 FILE *infile; | |
| 103 FILE *xfile; | |
| 20 | 104 FILE *logfile; |
| 1 | 105 FILE *disk[] = {0,0}; |
| 0 | 106 |
| 9 | 107 #ifdef USE_MMU |
| 108 extern char *prog ; // for disass | |
| 11 | 109 extern Byte * mem0(Byte *iphymem, Word adr, Byte *immu) ; |
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110 #define pmem(a) mem0(phymem,a,mmu) |
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111 #else |
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112 #define pmem(a) (&mem[a]) |
| 9 | 113 #endif |
| 114 | |
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115 |
| 20 | 116 extern int bpskip ; |
| 117 extern int stkskip ; | |
| 118 extern FILE *logfile; | |
| 0 | 119 |
| 1 | 120 void do_timer(int,int); |
| 121 void do_disk(int,int); | |
| 4 | 122 void do_mmu(int,int); |
| 0 | 123 |
| 124 int char_input(void) { | |
| 125 int c, w, sum; | |
| 126 if (!xmstat) { | |
| 127 if (infile) { | |
| 128 c = getc(infile); | |
| 129 if (c == EOF) { | |
| 130 fclose(infile); | |
| 131 infile = 0; | |
| 132 return char_input(); | |
| 133 } | |
| 134 if (c == '\n') | |
| 135 c = '\r'; | |
| 136 return c; | |
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137 } else { |
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138 usleep(100); |
| 0 | 139 return getchar(); |
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140 } |
| 0 | 141 } else if (xmstat == 1) { |
| 142 if (xidx) { | |
| 143 c = xmbuf[xidx++]; | |
| 144 if (xidx == 132) { | |
| 145 xidx = 0; | |
| 146 rcvdnak = EOF; | |
| 147 acknak = 6; | |
| 148 } | |
| 149 } else { | |
| 150 if ((acknak == 21 && rcvdnak == 21) || (acknak == 6 && rcvdnak == 6)) { | |
| 151 rcvdnak = 0; | |
| 152 memset(xmbuf, 0, 132); | |
| 153 w = fread(xmbuf + 3, 1, 128, xfile); | |
| 154 if (w) { | |
| 155 printf("Block %3d transmitted, ", blocknum); | |
| 156 xmbuf[0] = 1; | |
| 157 xmbuf[1] = blocknum; | |
| 158 xmbuf[2] = 255 - blocknum; | |
| 159 blocknum = (blocknum + 1) & 255; | |
| 160 sum = 0; | |
| 161 for (w = 3; w < 131; w++) | |
| 162 sum = (sum + xmbuf[w]) & 255; | |
| 163 xmbuf[131] = sum; | |
| 164 acknak = 6; | |
| 165 c = 1; | |
| 166 xidx = 1; | |
| 167 } else { | |
| 168 printf("EOT transmitted, "); | |
| 169 acknak = 4; | |
| 170 c = 4; | |
| 171 } | |
| 172 } else if (rcvdnak == 21) { | |
| 173 rcvdnak = 0; | |
| 174 printf("Block %3d retransmitted, ", xmbuf[1]); | |
| 175 c = xmbuf[xidx++]; /*retransmit the same block */ | |
| 176 } else | |
| 177 c = EOF; | |
| 178 } | |
| 179 return c; | |
| 180 } else { | |
| 181 if (acknak == 4) { | |
| 182 c = 6; | |
| 183 acknak = 0; | |
| 184 fclose(xfile); | |
| 185 xfile = 0; | |
| 186 xmstat = 0; | |
| 187 } else if (acknak) { | |
| 188 c = acknak; | |
| 189 acknak = 0; | |
| 190 } else | |
| 191 c = EOF; | |
| 192 if (c == 6) | |
| 193 printf("ACK\n"); | |
| 194 if (c == 21) | |
| 195 printf("NAK\n"); | |
| 196 return c; | |
| 197 } | |
| 198 } | |
| 199 | |
| 9 | 200 int do_input(int a) { |
| 0 | 201 static int c, f = EOF; |
| 18 | 202 if (a == 0+(IOPAGE&0x1ff)) { |
| 0 | 203 if (f == EOF) |
| 204 f = char_input(); | |
| 34 | 205 if (f != EOF) { |
| 0 | 206 c = f; |
| 34 | 207 mem[(IOPAGE&0xfe00) + a] = c; |
| 208 } | |
| 209 mem[(IOPAGE&0xfe00) + a] = c = 2 + (f != EOF); | |
| 210 return c; | |
| 18 | 211 } else if (a == 1+(IOPAGE&0x1ff)) { /*data port*/ |
| 0 | 212 if (f == EOF) |
| 213 f = char_input(); | |
| 214 if (f != EOF) { | |
| 215 c = f; | |
| 216 f = EOF; | |
| 34 | 217 mem[(IOPAGE&0xfe00) + a] = c; |
| 0 | 218 } |
| 219 return c; | |
| 220 } | |
| 18 | 221 return mem[(IOPAGE&0xfe00) + a]; |
| 0 | 222 } |
| 223 | |
| 224 void do_output(int a, int c) { | |
| 225 int i, sum; | |
| 18 | 226 if (a == 1+(IOPAGE&0x1ff)) { /* ACIA data port,ignore address */ |
| 0 | 227 if (!xmstat) { |
| 228 if (logfile && c != 127 && (c >= ' ' || c == '\n')) | |
| 229 putc(c, logfile); | |
| 230 putchar(c); | |
| 231 fflush(stdout); | |
| 232 } else if (xmstat == 1) { | |
| 233 rcvdnak = c; | |
| 234 if (c == 6 && acknak == 4) { | |
| 235 fclose(xfile); | |
| 236 xfile = 0; | |
| 237 xmstat = 0; | |
| 238 } | |
| 239 if (c == 6) | |
| 240 printf("ACK\n"); | |
| 241 if (c == 21) | |
| 242 printf("NAK\n"); | |
| 243 if (c == 24) { | |
| 244 printf("CAN\n"); | |
| 245 fclose(xfile); | |
| 246 xmstat = 0; | |
| 247 xfile = 0; | |
| 248 } | |
| 249 } else { | |
| 250 if (xidx == 0 && c == 4) { | |
| 251 acknak = 4; | |
| 252 printf("EOT received, "); | |
| 253 } | |
| 254 xmbuf[xidx++] = c; | |
| 255 if (xidx == 132) { | |
| 256 sum = 0; | |
| 257 for (i = 3; i < 131; i++) | |
| 258 sum = (sum + xmbuf[i]) & 255; | |
| 259 if (xmbuf[0] == 1 && xmbuf[1] == 255 - xmbuf[2] | |
| 260 && sum == xmbuf[131]) | |
| 261 acknak = 6; | |
| 262 else | |
| 263 acknak = 21; | |
| 264 printf("Block %3d received, ", xmbuf[1]); | |
| 265 if (blocknum == xmbuf[1]) { | |
| 266 blocknum = (blocknum + 1) & 255; | |
| 267 fwrite(xmbuf + 3, 1, 128, xfile); | |
| 268 } | |
| 269 xidx = 0; | |
| 270 } | |
| 271 } | |
| 18 | 272 } else if (a >= 0x40+(IOPAGE&0x1ff)) { /* disk */ |
| 11 | 273 do_disk(a,c); |
| 18 | 274 } else if (a >= 0x30+(IOPAGE&0x1ff)) { /* timer */ |
| 11 | 275 do_timer(a,c); |
| 18 | 276 } else if (a >= 0x10+(IOPAGE&0x1ff)) { /* mmu */ |
| 4 | 277 do_mmu(a,c); |
| 35 | 278 #ifdef USE_MMU |
| 279 } else { /* fixed ram */ | |
| 280 mem[ a + 0xfe00 ] = c; | |
| 281 #endif | |
| 0 | 282 } |
| 283 } | |
| 284 | |
| 285 | |
| 1 | 286 void do_timer(int a, int c) { |
| 287 struct itimerval timercontrol; | |
| 18 | 288 if (a==0x30+(IOPAGE&0x1ff) && c==0x8f) { |
| 1 | 289 timercontrol.it_interval.tv_sec = 0; |
| 290 timercontrol.it_interval.tv_usec = 20000; | |
| 291 timercontrol.it_value.tv_sec = 0; | |
| 292 timercontrol.it_value.tv_usec = 20000; | |
| 34 | 293 timer_irq = 1; |
| 1 | 294 setitimer(ITIMER_REAL, &timercontrol, NULL); |
| 34 | 295 mem[(IOPAGE&0xfe00)+a]=c; |
| 18 | 296 } else if (a==0x30+(IOPAGE&0x1ff) && c==0x80) { |
| 1 | 297 timercontrol.it_interval.tv_sec = 0; |
| 298 timercontrol.it_interval.tv_usec = 0; | |
| 299 setitimer(ITIMER_REAL, &timercontrol, NULL); | |
| 34 | 300 mem[(IOPAGE&0xfe00)+a]=c; |
| 18 | 301 } else if (a==0x30+(IOPAGE&0x1ff) && c==0x04) { |
| 1 | 302 time_t tm = time(0); |
| 303 struct tm *t = localtime(&tm); | |
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304 mem[IOPAGE+0x31] = t->tm_year; |
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305 mem[IOPAGE+0x32] = t->tm_mon; |
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306 mem[IOPAGE+0x33] = t->tm_mday; |
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307 mem[IOPAGE+0x34] = t->tm_hour; |
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308 mem[IOPAGE+0x35] = t->tm_min; |
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309 mem[IOPAGE+0x36] = t->tm_sec; |
| 1 | 310 } else { |
| 18 | 311 mem[(IOPAGE&0xfe00)+a]=c; |
| 1 | 312 } |
| 313 } | |
| 314 | |
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315 |
| 1 | 316 void do_disk(int a, int c) { |
| 18 | 317 if (a!=0x40+(IOPAGE&0x1ff)) { |
| 318 mem[(IOPAGE&0xfe00)+a]=c; | |
| 1 | 319 return; |
| 320 } | |
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321 int drv = mem[IOPAGE+0x41]; |
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322 int lsn = (mem[IOPAGE+0x42]<<16) + (mem[IOPAGE+0x43]<<8) + mem[IOPAGE+0x44]; |
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323 int buf = (mem[IOPAGE+0x45]<<8) + mem[IOPAGE+0x46]; |
| 1 | 324 if (drv > 1 || disk[drv]==0) goto error; |
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325 Byte *phy = pmem(buf); |
| 1 | 326 if (c==0x81) { |
| 327 if (lseek(fileno(disk[drv]),lsn*SECSIZE,SEEK_SET)==-1) goto error; | |
| 30 | 328 if (read(fileno(disk[drv]),phy,SECSIZE)==-1) goto error; |
| 1 | 329 } else if (c==0x55) { |
| 330 if (lseek(fileno(disk[drv]),lsn*SECSIZE,SEEK_SET)==-1) goto error; | |
| 30 | 331 if (write(fileno(disk[drv]),phy,SECSIZE)==-1) goto error; |
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332 #ifdef VDISK |
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333 } else { |
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334 do_vdisk(c); |
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335 #endif |
| 1 | 336 } |
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337 mem[IOPAGE+0x40] = 0; |
| 1 | 338 return; |
| 339 error : | |
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340 mem[IOPAGE+0x40] = 0xff; |
| 1 | 341 } |
| 342 | |
| 4 | 343 void do_mmu(int a, int c) |
| 344 { | |
| 345 #ifdef USE_MMU | |
| 346 | |
| 18 | 347 if (a==0x11+(IOPAGE&0x1ff)) { |
| 13 | 348 if (c&1) { |
| 23 | 349 mmu = &mem[0xffa8]; |
| 13 | 350 } else { |
| 23 | 351 mmu = &mem[0xffa0]; |
| 4 | 352 } |
| 353 } | |
| 18 | 354 mem[(IOPAGE&0xfe00)+a] = c; // other register such as 0xffa0-0xffaf |
| 4 | 355 #endif |
| 356 } | |
| 357 | |
| 0 | 358 void timehandler(int sig) { |
| 359 attention = 1; | |
| 360 irq = 2; | |
| 34 | 361 mem[(IOPAGE&0xfe00)+0x30] |= 0x10 ; |
| 362 // signal(SIGALRM, timehandler); | |
| 0 | 363 } |
| 364 | |
| 365 void handler(int sig) { | |
| 366 escape = 1; | |
| 367 attention = 1; | |
| 368 bpskip = 0; | |
| 369 stkskip = 0; | |
| 370 } | |
| 371 | |
| 20 | 372 void init_term(void) { |
| 373 tcgetattr(0, &termsetting); | |
| 374 tflags = fcntl(0, F_GETFL, 0); | |
| 375 } | |
| 376 | |
| 0 | 377 void set_term(char c) { |
| 378 signal(SIGQUIT, SIG_IGN); | |
| 379 signal(SIGTSTP, SIG_IGN); | |
| 380 signal(SIGINT, handler); | |
| 381 signal(SIGUSR1, handler); | |
| 382 newterm = termsetting; | |
| 383 newterm.c_iflag = newterm.c_iflag & ~INLCR & ~ICRNL; | |
| 384 newterm.c_lflag = newterm.c_lflag & ~ECHO & ~ICANON; | |
| 385 newterm.c_cc[VTIME] = 0; | |
| 386 newterm.c_cc[VMIN] = 1; | |
| 387 newterm.c_cc[VINTR] = escchar; | |
| 388 tcsetattr(0, TCSAFLUSH, &newterm); | |
| 389 fcntl(0, F_SETFL, tflags | O_NDELAY); /* Make input from stdin non-blocking */ | |
| 390 signal(SIGALRM, timehandler); | |
| 391 timercontrol.it_interval.tv_sec = 0; | |
| 392 timercontrol.it_interval.tv_usec = 20000; | |
| 393 timercontrol.it_value.tv_sec = 0; | |
| 394 timercontrol.it_value.tv_usec = 20000; | |
| 395 if (timer) | |
| 396 setitimer(ITIMER_REAL, &timercontrol, NULL); | |
| 397 } | |
| 20 | 398 |
| 399 void restore_term(void) { | |
| 22 | 400 termsetting.c_iflag = termsetting.c_iflag | INLCR | ICRNL; |
| 20 | 401 tcsetattr(0, TCSAFLUSH, &termsetting); |
| 402 fcntl(0, F_SETFL, tflags); | |
| 403 signal(SIGALRM, SIG_IGN); | |
| 404 } | |
| 405 | |
| 406 | |
| 407 | |
| 408 |