Mercurial > hg > Members > kono > os9 > sbc09
annotate v09.c @ 55:8d151f303bee
FIRQ does not worked
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 23 Jul 2018 08:35:25 +0900 |
| parents | 51b437557f42 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* 6809 Simulator V09. |
| 2 | |
| 3 Copyright 1994, L.C. Benschop, Eidnhoven The Netherlands. | |
| 4 This version of the program is distributed under the terms and conditions | |
| 5 of the GNU General Public License version 2. See the file COPYING. | |
| 6 THERE IS NO WARRANTY ON THIS PROGRAM!!! | |
| 7 | |
| 8 This program simulates a 6809 processor. | |
| 9 | |
| 10 System dependencies: short must be 16 bits. | |
| 11 char must be 8 bits. | |
| 12 long must be more than 16 bits. | |
| 13 arrays up to 65536 bytes must be supported. | |
| 14 machine must be twos complement. | |
| 15 Most Unix machines will work. For MSODS you need long pointers | |
| 16 and you may have to malloc() the mem array of 65536 bytes. | |
| 17 | |
| 18 Define BIG_ENDIAN if you have a big-endian machine (680x0 etc) | |
| 19 | |
| 20 Special instructions: | |
| 21 SWI2 writes char to stdout from register B. | |
| 22 SWI3 reads char from stdout to register B, sets carry at EOF. | |
| 23 (or when no key available when using term control). | |
| 24 SWI retains its normal function. | |
| 25 CWAI and SYNC stop simulator. | |
| 26 | |
| 27 */ | |
| 28 | |
| 29 | |
| 30 #include <stdio.h> | |
| 31 #include <stdlib.h> | |
| 32 #include <strings.h> | |
| 33 #include <sys/stat.h> | |
| 34 | |
| 35 #define engine extern | |
| 36 | |
| 37 #include "v09.h" | |
| 38 | |
| 39 FILE *tracefile; | |
| 40 | |
|
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41 extern FILE *disk[]; |
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42 extern FILE *fp; // for disasm |
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43 extern char *prog; // for disasm |
| 0 | 44 extern void disasm(int,int); |
| 16 | 45 extern void do_mmu(Word,Byte); |
| 20 | 46 extern void init_term(void) ; |
| 47 | |
| 0 | 48 |
| 49 void do_trace(FILE *tracefile) | |
| 50 { | |
| 51 Word pc=pcreg; | |
| 52 Byte ir; | |
| 53 // fprintf(tracefile,"pc=%04x ",pc); | |
| 54 // ir=mem[pc++]; | |
| 55 // fprintf(tracefile,"i=%02x ",ir); if((ir&0xfe)==0x10) fprintf(tracefile,"%02x ",mem[pc]);else | |
| 56 // fprintf(tracefile," "); | |
| 57 fprintf(tracefile,"x=%04x y=%04x u=%04x s=%04x a=%02x b=%02x cc=%02x pc=", | |
| 58 xreg,yreg,ureg,sreg,*areg,*breg,ccreg); | |
| 59 fp = tracefile; | |
| 60 disasm(pc,pc); | |
| 61 } | |
| 62 | |
| 63 char *romfile = "v09.rom"; | |
| 9 | 64 long romstart = 0x8000; |
| 0 | 65 |
| 66 long | |
| 67 filesize(FILE *image) | |
| 68 { | |
| 69 struct stat buf; | |
| 70 fstat(fileno(image),&buf); | |
| 71 return buf.st_size; | |
| 72 } | |
| 73 | |
| 74 | |
| 75 void | |
| 76 read_image() | |
| 77 { | |
| 78 FILE *image; | |
| 79 if((image=fopen(romfile,"rb"))==NULL) | |
| 80 if((image=fopen("../v09.rom","rb"))==NULL) | |
| 81 if((image=fopen("..\\v09.rom","rb"))==NULL) { | |
| 82 perror("v09, image file"); | |
| 83 exit(2); | |
| 84 } | |
| 85 long len = filesize(image); | |
|
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86 /* |
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87 * |
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88 * 0x0000-0xdfff normal mem |
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89 * 0xxxxx-0xdfff rom |
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90 * 0xe000-0xe100 i/o |
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91 * 0xe000-0xffff rom |
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92 * |
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93 * discless boot |
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94 * rom image will be copyied from 0xed00-0x1xxxx |
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95 * boot copies 0x10000-0x1xxxx to os9's boot memory |
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96 */ |
| 16 | 97 #ifdef USE_MMU |
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98 /* |
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99 * In case of Coco, there is no ROM (switched out after boot ) |
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100 * 0x00000-0x0fdff normal mem |
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101 * 0x0fe00-0x0ffff ram fixed address ram including io |
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102 * 0x10000-0x7ffff ram (512Kb memory current implementation) |
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103 * it should have 2MB memory |
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104 * 0x10000-0xfffff ram |
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105 * >0x100000 lapround |
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106 * |
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107 * discless boot |
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108 * rom image will be copyied from 0xed00-0x1xxxx |
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109 * boot copies 0x10000-0x1xxxx to os9's boot memory |
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110 */ |
| 16 | 111 phymem = malloc(memsize + len - 0x2000); |
| 112 rommemsize = memsize + len - 0x2000; | |
| 113 mem = phymem + memsize - 0x10000 ; | |
| 24 | 114 mmu = &mem[0xffa0]; |
| 16 | 115 prog = (char*)mem; |
| 9 | 116 if (romstart==0x8000) { |
| 33 | 117 // romstart = memsize - 0x10000 + 0xed00 ; |
| 118 romstart = memsize ; // full 512kb mem | |
| 16 | 119 } |
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120 fread(mem+ 0xe000,len,1,image); |
| 33 | 121 mem[0xffa7] = 0x3f; |
| 9 | 122 #else |
| 16 | 123 if (romstart==0x8000) { |
| 9 | 124 romstart = 0x10000 - len; |
| 16 | 125 } |
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126 fread(mem+(romstart&0xffff),len,1,image); |
| 9 | 127 #endif |
| 0 | 128 fclose(image); |
| 129 } | |
| 130 | |
| 131 void usage(void) | |
| 132 { | |
| 9 | 133 fprintf(stderr,"Usage: v09 [-rom rom-image] [-l romstart] [-t tracefile [-tl addr] [-nt]" |
| 0 | 134 "[-th addr] ]\n[-e escchar] \n"); |
| 135 exit(1); | |
| 136 } | |
| 137 | |
| 138 | |
| 139 #define CHECKARG if(i==argc)usage();else i++; | |
| 140 | |
| 141 int | |
| 142 main(int argc,char *argv[]) | |
| 143 { | |
| 144 char *imagename=0; | |
| 145 int i; | |
| 146 int setterm = 1; | |
| 55 | 147 timerirq = 2; // use FIRQ default |
| 4 | 148 memsize = 512*1024; |
| 0 | 149 escchar='\x1d'; |
| 150 tracelo=0;tracehi=0xffff; | |
| 151 for(i=1;i<argc;i++) { | |
| 152 if (strcmp(argv[i],"-t")==0) { | |
| 153 i++; | |
| 154 if((tracefile=fopen(argv[i],"w"))==NULL) { | |
| 155 perror("v09, tracefile"); | |
| 156 exit(2); | |
| 157 } | |
| 158 tracing=1;attention=1; | |
| 159 } else if (strcmp(argv[i],"-rom")==0) { | |
| 160 i++; | |
| 55 | 161 timer = 0; // non standard rom image, don't start timer |
| 162 timerirq = 1 ; // os9 cannot handle FIRQ | |
| 0 | 163 romfile = argv[i]; |
| 9 | 164 |
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165 } else if (strcmp(argv[i],"-0")==0) { |
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166 i++; |
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167 disk[0] = fopen(argv[i],"r+"); |
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168 } else if (strcmp(argv[i],"-1")==0) { |
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169 i++; |
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31d96e2b364e
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170 disk[1] = fopen(argv[i],"r+"); |
| 0 | 171 } else if (strcmp(argv[i],"-tl")==0) { |
| 172 i++; | |
| 173 tracelo=strtol(argv[i],(char**)0,0); | |
| 174 } else if (strcmp(argv[i],"-th")==0) { | |
| 175 i++; | |
| 176 tracehi=strtol(argv[i],(char**)0,0); | |
| 177 } else if (strcmp(argv[i],"-e")==0) { | |
| 178 i++; | |
| 179 escchar=strtol(argv[i],(char**)0,0); | |
| 180 } else if (strcmp(argv[i],"-l")==0) { | |
| 181 i++; | |
| 182 romstart=strtol(argv[i],(char**)0,0); | |
| 1 | 183 } else if (strcmp(argv[i],"-nt")==0) { // start debugger at the start |
| 0 | 184 attention = escape = 1; |
| 1 | 185 timer = 0; // no timer |
| 4 | 186 } else if (strcmp(argv[i],"-m")==0) { |
| 187 i++; | |
| 188 memsize=strtol(argv[i],(char**)0,0) & ~0xffff; | |
| 189 if (memsize < 512*1024) memsize = 512*1024; | |
| 0 | 190 } else usage(); |
| 191 } | |
| 192 #ifdef MSDOS | |
| 193 if((mem=farmalloc(65535))==0) { | |
| 194 fprintf(stderr,"Not enough memory\n"); | |
| 195 exit(2); | |
| 196 } | |
| 197 #endif | |
| 198 read_image(); | |
| 20 | 199 init_term(); |
| 0 | 200 if (setterm) set_term(escchar); |
| 201 pcreg=(mem[0xfffe]<<8)+mem[0xffff]; | |
| 16 | 202 prog = (char*)mem; // for disasm |
| 0 | 203 interpr(); |
| 204 return 0; | |
| 205 } | |
| 206 |